Trellix Application Control 8.x Security Technical Implementation Guide

  • Version/Release: V3R1
  • Published: 2024-06-10
  • Released: 2024-07-24
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This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.
b
A Trellix Application Control written policy must be documented to outline the organization-specific variables for application whitelisting.
CM-7 - Medium - CCI-001774 - V-213316 - SV-213316r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-PO-000100
Vuln IDs
  • V-213316
  • V-74175
Rule IDs
  • SV-213316r961479_rule
  • SV-88849
Enabling application whitelisting without adequate design and organization-specific requirements will either result in an implementation which is too relaxed or an implementation which causes denial of service to its user community. Documenting the specific requirements and trust model before configuring and deploying the Trellix Application Control software is mandatory.
Checks: C-14544r944815_chk

Consult with the ISSO/ISSM to review the organizational-specific written policy for the Trellix Application Control software. If no written policy exists, this is a finding.

Fix: F-14542r944816_fix

Document fully the written policy for the Trellix Application Control software, to include processes for password management, vetting application for whitelist/blocking, frequency of reviewing application whitelist, and settings for other requirements in this STIG. Submit the written policy to be initially approved by and maintained by the Information System Security Officer/Information System Security Manager (ISSO/ISSM/AO) at that location. Formalize a change control process to ensure changes to the written policy are made in a controlled manner. Formalize a review process requiring signed acceptance by the ISSO/ISSM/AO for any changes made to the written policy. If a formal Change Advisory Board (CAB) or Configuration Control Board (CCB) exists, the Trellix Application Control written policy must be under the CAB/CCB oversight.

b
The use of a Solidcore 8.x local Command Line Interface (CLI) Access Password must be documented in the organizations written policy.
- Medium - CCI-004061 - V-213317 - SV-213317r986195_rule
RMF Control
Severity
Medium
CCI
CCI-004061
Version
MCAC-PO-000101
Vuln IDs
  • V-213317
  • V-74219
Rule IDs
  • SV-213317r986195_rule
  • SV-88893
The Solidcore client can be configured locally at the CLI, but only when accessed with the required password. Since the Trellix Application Control configuration is to be managed by ePO policies, allowing enablement of the CLI to would introduce the capability of local configuration changes. Strict management of the accessibility of the CLI is necessary in order to prevent its misuse. The misuse of the CLI would open the system up to the possible configuration changes potentially allowing malicious applications to execute unknowingly.
Checks: C-14545r986194_chk

Note: The CLI Access is in lockdown mode by default when being managed by ePO. Since the CLI Access can be recovered for troubleshooting, this requirement needs to be met. Consult with the information system security officer (ISSO)/information system security manager (ISSM) to obtain a copy of the organization's documented policy for application whitelisting. Review the written policy for how and when the Solidcore CLI is used by the organization. If the use of the CLI is not documented in the organization's written policy, this is a finding.

Fix: F-14543r505017_fix

Follow the formal change and acceptance process to update the organization's written policy with the use of the CLI.

b
The Solidcore client Command Line Interface (CLI) Access password complexity requirements must be documented in the organizations written policy.
- Medium - CCI-004066 - V-213318 - SV-213318r986197_rule
RMF Control
Severity
Medium
CCI
CCI-004066
Version
MCAC-PO-000102
Vuln IDs
  • V-213318
  • V-74221
Rule IDs
  • SV-213318r986197_rule
  • SV-88895
The Solidcore client can be configured locally at the CLI, but only when accessed with the required password. The misuse of the CLI would open the system up to the possible configuration, allowing malicious applications to execute unknowingly. Strict management of the accessibility of the CLI is necessary in order to prevent its misuse.
Checks: C-14546r986196_chk

Note: The CLI Access is in lockdown mode by default when being managed by ePO. Since the CLI Access can be recovered for troubleshooting, this requirement needs to be met. Since the Solidcore CLI does not allow for technical enforcement of password complexity the enforcement will be via this written policy directive. Consult with the information system security officer (ISSO)/information system security manager (ISSM) to obtain a copy of the organization's documented policy for application whitelisting. Review the written policy for CLI password complexity requirements. Verify the policy requires the password to be 15 characters in length and contain a mix of at least one lowercase, one uppercase, one number, and one special character. If the written policy does not document the requirement for password complexity and/or does not specify the password must be 15 characters in length and contain a mix of at least one lowercase, one uppercase, one number, and one special character, this is a finding.

Fix: F-14544r309052_fix

Follow the formal change and acceptance process to update the written policy with the CLI password complexity requirements.

b
The Solidcore client Command Line Interface (CLI) Access Password protection process must be documented in the organizations written policy.
IA-5 - Medium - CCI-000197 - V-213319 - SV-213319r961029_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000197
Version
MCAC-PO-000103
Vuln IDs
  • V-213319
  • V-74195
Rule IDs
  • SV-213319r961029_rule
  • SV-88869
The Solidcore client can be configured locally at the CLI, but only when accessed with the required password. Since the Trellix Application Control configuration is to be managed by ePO policies, allowing enablement of the CLI to would introduce the capability of local configuration changes. Strict management of the accessibility of the CLI is necessary in order to prevent its misuse. The misuse of the CLI would open the system up to the possible configuration changes potentially allowing malicious applications to execute unknowingly.
Checks: C-14547r309054_chk

Note: The CLI Access is in lockdown mode by default when being managed by ePO. Since the CLI Access can be recovered for troubleshooting, this requirement needs to be met. Consult with the ISSO/ISSM to obtain a copy of the organization's documented policy for application whitelisting. Review the written policy for how the Solidcore client interface is used by the organization. Verify the policy identifies how the CLI password is protected. Ask the ePO admin, "What protection measures are used for the CLI password?" The protection measures should include, at a minimum, storage in a sealed envelope, which is then stored in an approved safe. Note: The envelope will contain the last access date along with those authorized to use it. If the written policy does not contain specific information on how the CLI password is protected and/or if that policy does not include, at a minimum, that the password be stored in a sealed envelope in an approved safe with the last access date noted, this is a finding.

Fix: F-14545r309055_fix

Follow the formal change and acceptance process to update the written policy with specific information on how the CLI password is protected and that the password must be stored in a sealed envelope in an approved safe with the last access date noted.

b
The requirement for scheduled Solidcore client Command Line Interface (CLI) Access Password changes must be documented in the organizations written policy.
- Medium - CCI-004066 - V-213320 - SV-213320r986199_rule
RMF Control
Severity
Medium
CCI
CCI-004066
Version
MCAC-PO-000104
Vuln IDs
  • V-213320
  • V-74197
Rule IDs
  • SV-213320r986199_rule
  • SV-88871
The Solidcore client can be configured locally at the CLI, but only when accessed with the required password. The misuse of the CLI would open the system up to the possible configuration, allowing malicious applications to execute unknowingly. Strict management of the accessibility of the CLI is necessary in order to prevent its misuse.
Checks: C-14548r986198_chk

Note: The CLI Access is in lockdown mode by default when being managed by ePO. Since the CLI Access can be recovered for troubleshooting, this requirement needs to be met. Consult with the information system security officer (ISSO)/information system security manager (ISSM) to obtain a copy of the organization's documented policy for application whitelisting. Review the written policy for how the Solidcore client interface is used by the organization. Verify the policy identifies the frequency with which the CLI password is changed. If the written policy does not contain specific information on frequency with which the CLI password is changed, this is a finding.

Fix: F-14546r309058_fix

Follow the formal change and acceptance process to update the written policy with specific information on the frequency with which the CLI password is changed.

b
The process by which the Solidcore client Command Line Interface (CLI) Access Password is made available to administrators when needed must be documented in the organizations written policy.
CM-6 - Medium - CCI-000366 - V-213321 - SV-213321r986211_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
MCAC-PO-000105
Vuln IDs
  • V-213321
  • V-74199
Rule IDs
  • SV-213321r986211_rule
  • SV-88873
The Solidcore client can be configured locally at the CLI, but only when accessed with the required password. Since the Trellix Application Control configuration is to be managed by ePO policies, allowing enablement of the CLI to would introduce the capability of local configuration changes. Strict management of the accessibility of the CLI is necessary in order to prevent its misuse. The misuse of the CLI would open the system up to the possible configuration changes potentially allowing malicious applications to execute unknowingly.
Checks: C-14549r986210_chk

Note: The CLI Access is in lockdown mode by default when being managed by ePO. Since the CLI Access can be recovered for troubleshooting, this requirement needs to be met. Consult with the information system security officer (ISSO)/information system security manager (ISSM) to obtain a copy of the organization's documented policy for application whitelisting. The policy must contain procedures for accessing the CLI password, to include the system administrator (SA) gaining access to an approved safe in order for obtaining the password. If a procedure does not exist for accessing the CLI password as described above, this is a finding.

Fix: F-14547r309061_fix

Follow the formal change and acceptance process to update the written policy to include procedures for accessing the CLI password and how the SA gains access to an approved safe in order for obtaining the password.

b
The Trellix Application Control Options Advanced Threat Defense (ATD) settings, if being used, must be confined to the organizations enclave.
- Medium - CCI-004964 - V-213322 - SV-213322r986201_rule
RMF Control
Severity
Medium
CCI
CCI-004964
Version
MCAC-PO-000106
Vuln IDs
  • V-213322
  • V-74201
Rule IDs
  • SV-213322r986201_rule
  • SV-88875
Data will be leaving the endpoint to be analyzed by the ATD. Because data could feasibly be intercepted en route, risk of outside threats is minimized by ensuring the ATD is in the same enclave as the endpoints.
Checks: C-14550r986200_chk

If an ATD server is not being used in the environment, this is Not Applicable. Consult with the information system security officer (ISSO)/information system security manager (ISSM) to review the written policy to ensure the usage of an ATD is documented. If the usage of an ATD is not documented in the written policy, this is a finding. Determine the location of the ATD being used by the organization and verify the ATD is confined to the organization's enclave. If the location of the ATD being used by the organization cannot be determined and the ATD is not confined to the organization's enclave, this is a finding.

Fix: F-14548r309064_fix

Relocate or reinstall the ATD being used by the organization to be confined to the organization's enclave.

b
The configuration of features under Trellix Application Control Options policies Enforce feature control must be documented in the organizations written policy.
CM-7 - Medium - CCI-001774 - V-213323 - SV-213323r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-PO-000108
Vuln IDs
  • V-213323
  • V-74203
Rule IDs
  • SV-213323r961479_rule
  • SV-88877
By default, the Trellix Application Control prevents installation of ActiveX controls on endpoints, enforces memory protection techniques on endpoints, and prevents MSI-installers from running on endpoints. The Feature Control allows for those safeguards to be bypassed and in doing so renders the Trellix Application Control less effective.
Checks: C-14551r944822_chk

Consult with the ISSO/ISSM to obtain a copy of the organization's documented policy for application whitelisting. Review the written policy for how the Solidcore client interface is used by the organization. Verify the written policy identifies whether additional features are enabled or not under "Enforce feature control" of the Trellix Application Control Options ePO policy. If the written policy does not identify whether additional features are enabled or not under "Enforce feature control" of the Trellix Application Control Options ePO policy, this is a finding.

Fix: F-14549r309067_fix

Follow the formal change and acceptance process to document any features needing to be enabled.

b
The organizations written policy must include a process for how whitelisted applications are deemed to be allowed.
CM-7 - Medium - CCI-001774 - V-213324 - SV-213324r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-PO-000109
Vuln IDs
  • V-213324
  • V-74205
Rule IDs
  • SV-213324r961479_rule
  • SV-88879
Enabling application whitelisting without adequate design and organization-specific requirements will either result in an implementation which is too relaxed or an implementation which causes denial of service to its user community. Documenting the specific requirements and trust model before configuring and deploying the Trellix Application Control software is mandatory.
Checks: C-14552r944824_chk

Consult with the ISSO/ISSM to review the organizational-specific written policy for the Trellix Application Control software. Verify the written policy includes a process for how applications are vetted and deemed to be allowed. If no written policy exists, this is a finding. If written policy does not include a process for vetting applications before allowing them, this is a finding.

Fix: F-14550r309070_fix

Follow the formal change and acceptance process to update the written policy to include a process for how applications are vetted and deemed to be allowed.

b
The organizations written policy must include procedures for how often the whitelist of allowed applications is reviewed.
CM-7 - Medium - CCI-001774 - V-213325 - SV-213325r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-PO-000110
Vuln IDs
  • V-213325
  • V-74207
Rule IDs
  • SV-213325r961479_rule
  • SV-88881
Enabling application whitelisting without adequate design and organization-specific requirements will either result in an implementation which is too relaxed or an implementation which causes denial of service to its user community. Documenting the specific requirements and trust model before configuring and deploying the Trellix Application Control software is mandatory.
Checks: C-14553r944826_chk

Consult with the ISSO/ISSM to review the organizational-specific written policy for the Trellix Application Control software. Verify the written policy includes a process for how often the application whitelist is reviewed. If no written policy exists, this is a finding. If written policy does not include a process for how often the application whitelist is reviewed, this is a finding.

Fix: F-14551r309073_fix

Follow the formal change and acceptance process to update the written policy to include a process for how often the application whitelist is reviewed.

b
The Solidcore client must be enabled.
CM-7 - Medium - CCI-001774 - V-213326 - SV-213326r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000100
Vuln IDs
  • V-213326
  • V-74209
Rule IDs
  • SV-213326r961479_rule
  • SV-88883
The Application Control whitelisting must be enabled on all workstation endpoints. To enable Application Control, the Solidcore client needs to be in enabled mode.
Checks: C-14554r505019_chk

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset(s) that need the organization-specific policy and view its properties. Click on the "Products" tab. Under "Product", verify the Solidcore 8.x client is listed as a product. If exists, click on the row to review additional information. Verify status shows "Enabled". If the Solidcore 8.x client is listed as an installed product but the status is not "Enabled", this is a finding.

Fix: F-14552r944828_fix

Although there is more than one way to deploy and enable the Solidcore client, the following is the method described in the Trellix Application Control Installation Guide. From the ePO server console System Tree, select "My Organization" in the System Tree. To deploy the Solidcore 8.x client: Select "This Group and All Subgroups". Select the asset and view its properties. Click on the "Actions" button at the bottom of the screen. Select "Agent". Select "Modify Tasks on a Single System". Click "Actions". Select "New Client Task Assignment" to open the "Client Task Assignment Builder" page. Specify the task name and add descriptive information. Select the target platform, subplatform, and version. Select the "Solidcore 8.0.0" product from the "Products and components" list. Select the "Install" action. Select the language of the package. Specify the branch where to add the package. Click "Save", then click "Next to open the "Schedule" page. Specify scheduling details, then click "Next". Review details, then click "Save". To enable the Solidcore 8.x client and scan for inventory: Select "This Group and All Subgroups". Select the asset and view its properties. Click on the "Actions" button at the bottom of the screen. Select "Agent". Select "Modify Tasks on a Single System". Click "Actions". Select "New Client Task Assignment" to open the "Client Task Assignment Builder" page. Select the "Solidcore 8.0.0" product and "SC: Enable" task type, then click "Create New Task".

c
The Solidcore client Command Line Interface (CLI) must be in lockdown mode.
CM-7 - High - CCI-001762 - V-213327 - SV-213327r961470_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001762
Version
MCAC-TE-000101
Vuln IDs
  • V-213327
  • V-74211
Rule IDs
  • SV-213327r961470_rule
  • SV-88885
By default, when an endpoint's Solidcore installation is managed by the ePO server, the CLI will automatically be in lockdown mode. This will ensure the endpoint receives all of its Solidcore configuration settings from the ePO server. The CLI can, however, be activated for troubleshooting efforts during which time the ePO settings will not be enforced. Leaving the CLI in an allowed status will prevent the endpoint from receiving changes from the ePO server for the Solidcore client.
Checks: C-14555r309078_chk

Determine CLI status. Access the system being reviewed. From an operating system command line, execute the following command: sadmin status <enter> If the status for CLI is "Allowed" or "Recovered", this is a finding.

Fix: F-14553r309079_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Click "Actions". Select "New Client Task Assignment" to open the Client Task Assignment Builder page. Select the "Solidcore 8.x product", "SC: Change Local CLI Access" task type, then click "Create New Task" to open the Client Task Catalog page. Change "CLI status" to "Restrict". Click "Save".

c
The Solidcore client Command Line Interface (CLI) Access Password must be changed from the default.
CM-7 - High - CCI-001774 - V-213328 - SV-213328r961479_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001774
Version
MCAC-TE-000102
Vuln IDs
  • V-213328
  • V-74213
Rule IDs
  • SV-213328r961479_rule
  • SV-88887
The Solidcore client can be configured locally at the CLI, but only when accessed with the required password. Since the Trellix Application Control configuration is to be managed by ePO policies, allowing enablement of the CLI to would introduce the capability of local configuration changes. Strict management of the accessibility of the CLI is necessary in order to prevent its misuse. The misuse of the CLI would open the system up to the possible configuration changes potentially allowing malicious applications to execute unknowingly.
Checks: C-14556r309081_chk

This is a manual procedure to verify the CLI Access Password has been changed from its default setting by the ePO administrator. Ask the ePO admin, "Has the CLI Access Password been changed from its default setting?" If the default password is being used, this is a finding. Note: The password does not need to be divulged during the review. An interview question of the SA to validate that it is not the default is sufficient.

Fix: F-14554r944830_fix

Change the CLI password with one other than the default, using administrative password complexity. From the ePO server console System Tree, select "My Organization". In the "Configuration (Client)" category, click on the Organization's specific Configuration (Client) Trellix Default policy. In the "CLI" tab, type a password other than the default, ensuring to conform to password complexity. Confirm the password. Click "Save".

b
The organization-specific Rules policy must only include executable and dll files that are associated with applications as allowed by the organizations written policy.
CM-7 - Medium - CCI-001774 - V-213329 - SV-213329r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000103
Vuln IDs
  • V-213329
  • V-74215
Rule IDs
  • SV-213329r961479_rule
  • SV-88889
To ensure Solidcore clients are only configured to STIG and organization-specific settings, organization-specific ePO policies must be applied to all organization workstation endpoints. The Trellix Application Control installs with two Default Rules policies. The Trellix Default Rules policy includes the whitelist for commonly used applications to the platform. The Trellix Applications Default Rules policy include the whitelist for Trellix applications. Both of these policies are at the "My Organization" level of the System Tree and must be inherited by all branches of the System Tree. Organization-specific applications would be whitelisted with an organization-specific policy combined with the two Default policies into one effective policy.
Checks: C-14557r944832_chk

Obtain the organization's written policy for the Trellix Application Control software from the System or ePO Administrator. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset(s) that need the organization-specific policy. Note: The organization specific rules policy is for additional allowed applications. In the event there are Trellix Default rules that need to be excluded in an organization or on a specific asset, a copy of the Trellix Default must be used in place of the Trellix Default rules policy. In that copy, only the specific rules should be removed that the organization wants to deny. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select "Solidcore 8.x: Application Control". For the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. Identify the organization-specific Rules policy applied to the system being reviewed. Click on "Edit Policy" beside the organization-specific Rules policy. Verify the list of applications under each of the "Rules Groups" in the organization-specific Rules policy against the written policy's list of allowed applications. If the organization-specific Rules policy contains any applications not documented in the written policy as allowed, this is a finding.

Fix: F-14555r944833_fix

Obtain the organization's written policy for the Trellix Application Control software from the System or ePO Administrator. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. Remove any "Rules Groups" and/or applications under the "Rules Groups" that do not comply with the organization's written policy. If applications are required, follow the formal change and acceptance process to document the applications in the organization's written policy.

b
The Trellix Application Control Options Reputation setting must be configured to use the Trellix Global Threat Intelligence (Trellix GTI) option.
- Medium - CCI-004964 - V-213330 - SV-213330r986203_rule
RMF Control
Severity
Medium
CCI
CCI-004964
Version
MCAC-TE-000104
Vuln IDs
  • V-213330
  • V-74217
Rule IDs
  • SV-213330r986203_rule
  • SV-88891
If a Threat Intelligence Exchange (TIE) server is being used in the organization, reputation for files and certificates is fetched from the TIE server. The reputation values control execution at endpoints and are displayed on the Application Control pages on the Trellix ePO console. If the GTI is being used, reputation for files and certificates is fetched from the Trellix GTI. For both methods, the administrator can review the reputation values and make informed decisions for inventory items in the enterprise.
Checks: C-14558r986202_chk

Note: This requirement is Not Applicable on a classified SIPRNet or otherwise closed network. This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset(s) that need the organization-specific policy. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. Verify the "Use Trellix Global Threat Intelligence (Trellix GTI)" option is selected. Note: The "Trellix GTI" option must be selected, as a failover, even if an internal Trellix TIE server is configured. If the "Trellix GTI" option is not selected, this is a finding.

Fix: F-14556r944836_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. Place a check in the "Use Trellix Global Threat Intelligence (Trellix GTI)" option. Click "Save".

b
The Trellix Application Control Options Reputation-Based Execution settings, if enabled, must be configured to allow Most Likely Trusted or Known Trusted only.
CM-7 - Medium - CCI-001774 - V-213331 - SV-213331r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000105
Vuln IDs
  • V-213331
  • V-74223
Rule IDs
  • SV-213331r961479_rule
  • SV-88897
When a file is executed on an endpoint, the Application Control performs multiple checks to determine whether to allow or ban the execution. Only files with a reputation of "Most Likely Trusted", "Known Trusted" or "Might be Trusted" are considered to be allowed. By configuring the setting to only "Most Likely Trusted" or "Known Trusted", the files with a reputation of "Might be Trusted" are blocked. While this may impact operationally in the beginning, after the inventories are vetted by the administrators, files with a "Might be Trusted" value may be recategorized in that organization.
Checks: C-14559r505028_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. If Reputation-Based Execution settings is not enabled, this check is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset(s) that need the organization-specific policy. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. Verify the "Reputation-Based Execution Settings" is configured to allow binaries with "Most Likely Trusted" and above. If the allow binaries "Most Likely Trusted" and above is not selected for "Reputation-Based Execution Settings", this is a finding.

Fix: F-14557r505029_fix

If Reputation-Based Execution settings is not enabled, this check is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. Place a check in the "Reputation-Based Execution Settings: Allow binaries with" check box and select "Most Likely Trusted" from the drop-down selection box. Click "Save".

b
The Trellix Application Control Options Advanced Threat Defense (ATD) settings must not be enabled unless an internal ATD is maintained by the organization.
- Medium - CCI-004964 - V-213332 - SV-213332r986205_rule
RMF Control
Severity
Medium
CCI
CCI-004964
Version
MCAC-TE-000106
Vuln IDs
  • V-213332
  • V-74225
Rule IDs
  • SV-213332r986205_rule
  • SV-88899
This option will automatically send files with a specific file reputation to ATD for further analysis. This option is not selected by default and must only be selected if an ATD is being used.
Checks: C-14560r986204_chk

If an ATD server is not being used in the environment, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset(s) that need the organization-specific policy. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. Verify the option for sending binaries for analysis under the "Advanced Threat Defense (ATD) settings" is selected. Consult with the information system security officer (ISSO)/information system security manager (ISSM) to review the written policy to verify the usage of an ATD is documented. If the option for sending binaries for analysis under the "Advanced Threat Defense (ATD) settings" is selected and the written policy does not include documentation on the usage of an ATD, this is a finding.

Fix: F-14558r505032_fix

If an ATD server is not being used in the environment, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. Place a check in the "Advanced Threat Defense (ATD) settings: Send binaries" check box. Click "Save". Update the written policy to ensure the usage of an ATD is documented.

b
The Trellix Application Control Options Advanced Threat Defense (ATD) settings, if being used, must be configured to send all binaries with a reputation of Might be Trusted and below for analysis.
- Medium - CCI-004964 - V-213333 - SV-213333r986207_rule
RMF Control
Severity
Medium
CCI
CCI-004964
Version
MCAC-TE-000107
Vuln IDs
  • V-213333
  • V-74227
Rule IDs
  • SV-213333r986207_rule
  • SV-88901
When the file reputation of "Might be Trusted" is configured for being forwarded to ATD, all files with the reputation of "Might be Trusted", "Unknown", "Might be Malicious", "Most Likely Malicious" and "Known Malicious" are forwarded to the ATD. The files with "Might be Trusted" reputation may be redesignated as "Trusted" after analysis.
Checks: C-14561r986206_chk

This requirement is only applicable to Windows platforms. For Mac and Linux platforms, this is Not Applicable. If an ATD server is not being used in the environment, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. If the option for sending binaries for analysis under the "Advanced Threat Defense (ATD) settings" is selected, verify the level of binaries to be sent for analysis is "Might be Trusted" and below. If the level of binaries to be sent for analysis is not "Might be Trusted", this is a finding.

Fix: F-14559r505035_fix

If an ATD server is not being used in the environment, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. In the drop-down selection box of the "Advanced Threat Defense (ATD) settings: Send binaries" option, select "Might be Trusted". Click "Save".

b
The Trellix Application Control Options Advanced Threat Defense (ATD) settings, if being used, must be configured to only send binaries with a size of 5MB or less.
- Medium - CCI-004964 - V-213334 - SV-213334r986209_rule
RMF Control
Severity
Medium
CCI
CCI-004964
Version
MCAC-TE-000108
Vuln IDs
  • V-213334
  • V-74229
Rule IDs
  • SV-213334r986209_rule
  • SV-88903
Since binaries can be large, the file size must be limited to avoid congestion on the network and degradation on the endpoint when sending the binaries to the ATD.
Checks: C-14562r986208_chk

This requirement is only applicable to Windows platforms. For Mac and Linux platforms, this is Not Applicable. If an ATD server is not being used in the environment, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. If the option for sending binaries for analysis under the "Advanced Threat Defense (ATD) settings" is selected, verify the "Limit file size to" option is set to 5 MB or less. If the "Limit file size to" option is not set to 5 MB or less, this is a finding.

Fix: F-14560r505038_fix

If an ATD server is not being used in the environment, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. Select the "Reputation" tab. In the drop-down selection box of the "Advanced Threat Defense (ATD) settings: Limit file save" text box, enter a value of 5 MB or less. Click "Save".

b
Organization-specific Trellix Applications Control Options policies must be created and applied to all endpoints.
CM-7 - Medium - CCI-001774 - V-213335 - SV-213335r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000109
Vuln IDs
  • V-213335
  • V-74231
Rule IDs
  • SV-213335r961479_rule
  • SV-88905
To ensure Solidcore clients are only configured to STIG and organization-specific settings, organization-specific ePO policies must be applied to all organization workstation endpoints rather than resorting to the Trellix Applications Control (Default) policy.
Checks: C-14563r944842_chk

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)" that is specific for the asset being reviewed. If the only "Application Control Options" policy applied to the system is the "Trellix Default" policy, this is a finding.

Fix: F-14561r944843_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Actions" column, select "Edit Assignment" for the "Application Control Options (Windows) Category". Next to "Assigned policy:", click on drop-down selection box and choose an organization-specific Application Control Options policy for the asset being reviewed. Click "Save". If no organization-specific Application Control Options policy exist, click on "New Policy". Choose "Trellix Default" for "Create a policy based on this existing policy". Type a unique Policy Name. Click "OK". Configure the "Self-Approval", "End User Notifications", "Features", "Inventory", and "Reputation" tabs according to the organization's written policy and remaining STIG settings.

b
The Trellix Application Control Options policy must be configured to disable Self-Approval.
CM-7 - Medium - CCI-001774 - V-213336 - SV-213336r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000110
Vuln IDs
  • V-213336
  • V-74233
Rule IDs
  • SV-213336r961479_rule
  • SV-88907
The Trellix Application Control Self-Approval feature allows the user to take an action when a user tries to run a new or unknown application.
Checks: C-14564r505043_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Self-Approval" tab, verify the "Enable Self-Approval" check box is not selected. If the "Enable Self-Approval" check box is selected, this is a finding.

Fix: F-14562r505044_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Self-Approval" tab, de-select the "Enable Self-Approval" check box. Click "Save".

b
The Trellix Application Control Options policy End User Notification, if configured by organization, must have all default variables replaced with the organization-specific data.
CM-7 - Medium - CCI-001774 - V-213337 - SV-213337r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000111
Vuln IDs
  • V-213337
  • V-74235
Rule IDs
  • SV-213337r961479_rule
  • SV-88909
The "User Message" option will show a dialog box when an event is detected and display the organization-specified text in the message.
Checks: C-14565r944846_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. If "End User Notification" is not used by the organization, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "End User Notification" tab, determine if the "User Message:" option "Show the messages dialog box when an event is detected and display the specified text in the message." is selected. If "Show the messages dialog box when an event is detected and display the specified text in the message." is not selected, this is Not Applicable. If "Show the messages dialog box when an event is detected and display the specified text in the message." is selected, consult with the ISSO/ISSM to review the organizational-specific written policy for the Trellix Application Control software. Verify the usage of "End User Notification" is documented in the written policy and verify criteria for configuration. If "End User Notification:" variables are not configured to written documentation, this is a finding. If "End User Notification" is not documented in written policy, this is a finding.

Fix: F-14563r505047_fix

If "End User Notification" is not used by the organization, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "End User Notification" tab, select or de-select the "Show the messages dialog box when an event is detected and display the specified text in the message." based upon organization's written policy. If "Show the messages dialog box when an event is detected and display the specified text in the message." is de-selected based upon written policy, populate "Helpdesk Information" with information from the written policy. Click "Save". If "Show the messages dialog box when an event is detected and display the specified text in the message." is selected based upon written policy, populate "Helpdesk Information" with information from the written policy. Click "Save".

b
The Trellix Application Control Options policies Enforce feature control memory protection must be enabled.
CM-7 - Medium - CCI-001774 - V-213338 - SV-213338r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000112
Vuln IDs
  • V-213338
  • V-74237
Rule IDs
  • SV-213338r961479_rule
  • SV-88911
By default, the Trellix Application Control prevents installation of ActiveX controls on endpoints, enforces memory protection techniques on endpoints, and prevents MSI-installers from running on endpoints. The Feature Control allows for those safeguards to be bypassed and in doing so renders the Trellix Application Control less effective. Because ENS and HIPs have many more types of memory protection techniques than Trellix Application Control, memory protection must be explicitly disabled.
Checks: C-14566r505049_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset(s) that need the organization-specific policy. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Features" tab, review options selected. If the "Enforce feature control" check box is not selected and/or "Memory protection" is selected, this is a finding.

Fix: F-14564r505050_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Features" tab, place a check in the "Enforce feature control" check box. Remove the check in the "Memory protection" check box. Select or de-select remaining features, based upon written policy. Click "Save".

b
Enabled features under Trellix Application Control Options policies Enforce feature control must not be configured unless documented in written policy and approved by ISSO/ISSM.
CM-7 - Medium - CCI-001774 - V-213339 - SV-213339r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000113
Vuln IDs
  • V-213339
  • V-74239
Rule IDs
  • SV-213339r961479_rule
  • SV-88913
By default, the Trellix Application Control prevents installation of ActiveX controls on endpoints, enforces memory protection techniques on endpoints, and prevents MSI-installers from running on endpoints. The "Feature Control" allows for those safeguards to be bypassed and in doing so renders the Trellix Application Control less effective.
Checks: C-14567r505052_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Features" tab, review options selected. If the "Enforce feature control" check box is selected with any features, consult with the ISSO/ISSM to review the written policy and ensure the usage of additional features are documented. If the usage of additional features are not documented in the written policy, this is a finding.

Fix: F-14565r505053_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Features" tab, remove any features selected. If features are required technically that are not documented in the organization's written policy, document the use of those features following the formal change and acceptance process as documented in the organization's written policy.

b
The Trellix Application Control Options Inventory option must be configured to hide OS Files.
CM-7 - Medium - CCI-001774 - V-213340 - SV-213340r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000114
Vuln IDs
  • V-213340
  • V-74241
Rule IDs
  • SV-213340r961479_rule
  • SV-88915
By default, the Windows operating system files are excluded from the inventory. By selecting this option, the overwhelming the inventory with legitimate Windows Files in the \Windows folder which are signed by the Microsoft certificate and all files in the \Windows\winsxs folder will not be included in the inventory.
Checks: C-14568r944850_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Inventory" tab, review options selected. If the "Hide Windows OS Files: Inventory items signed with Microsoft certificates will not be sent to Trellix ePO." option is not selected, this is a finding.

Fix: F-14566r944851_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. From the "Policy" column, select the policy associated with the Category "Application Control Options (Windows)". On the "Inventory" tab, place a check in the "Inventory: Hide Windows OS Files: Inventory items signed with Microsoft certificates will not be sent to Trellix ePO." check box. Click "Save".

b
The Trellix Application Control Options Inventory interval option must be configured to pull inventory from endpoints on a regular basis not to exceed seven days.
CM-7 - Medium - CCI-001774 - V-213341 - SV-213341r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000115
Vuln IDs
  • V-213341
  • V-74243
Rule IDs
  • SV-213341r961479_rule
  • SV-88917
When Trellix Application Control is deployed on a system, it creates a whitelist of all executable binaries and scripts present on the system. The whitelist contains all authorized files, and only files that are present in the whitelist are allowed to execute. An executable binary, script, or process that is not in the whitelist is said to be unauthorized and is prevented from running. Trellix Application Control uses a centralized repository of trusted applications and dynamic whitelisting to reduce manual maintenance effort. Running frequent Pull Inventory tasks ensures inventory information does not become stale. There must be the minimum interval between consecutive inventory pull runs (when the inventory information is fetched from the endpoints). By default, this value is seven days and is the recommended setting. Pulling at an interval of greater than seven days will allow for the inventory of endpoints to become stale.
Checks: C-14569r944853_chk

Note: For VDI workstations that are reset copies of a VDI master image, this requirement is Not Applicable. For VDI master images, once an inventory is pulled after updates, further inventory is not required. Note: This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. Consult with the ISSO to determine the endpoints used for the sampling of inventory pulls. From the Trellix ePO console, select Menu >> Systems >> System Tree. If sampling is a group, select the group in the System Tree and switch to the “Assigned Client Tasks” tab. Otherwise, select each endpoint on the “Systems” page and then click Actions >> Agent >> Modify Tasks on a Single System. Confirm a client task exists with an “SC: Pull Inventory” task type. Review the task properties to validate the task is configured to run at least as frequently as every seven days and tasks randomize the inventory pulls. If a sampling of endpoints does not have a “Pull Inventory” task type applied and/or the “Pull Inventory” task is not configured to run at least as frequently as every seven days at randomized intervals, this is a finding.

Fix: F-14567r944854_fix

From the Trellix ePO console, select Menu >> Systems >> System Tree. To apply a client task to a group, select a group in the System Tree and switch to the "Assigned Client Tasks" tab. To apply a client task to an endpoint, select the endpoint on the "Systems" page and then click Actions >> Agent >> Modify Tasks on a Single System. Click Actions >> New Client Task Assignment to open the "Client Task Assignment Builder" page. Select "Solidcore 8.x" for the product and "SC: Pull Inventory" for the task type and then click "Create New Task" to open the "Client Task Catalog" page. Specify the task name and add any descriptive information. Click "Save". Click "Next" to open the "Schedule" page. Schedule the task to run at least as frequently as every seven days and then click "Next". Review and verify the task details and then click "Save".

b
The Trellix Applications Default Rules policy must be part of the effective rules policy applied to every endpoint.
CM-7 - Medium - CCI-001774 - V-213342 - SV-213342r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000117
Vuln IDs
  • V-213342
  • V-74247
Rule IDs
  • SV-213342r961479_rule
  • SV-88921
To ensure Solidcore clients are only configured to STIG and organization-specific settings, organization-specific ePO policies must be applied to all organization workstation endpoints. The Trellix Application Control installs with two Default Rules policies. The Trellix Default Rules policy includes the whitelist for commonly used applications to the platform. The Trellix Applications Default Rules policy include the whitelist for Trellix applications. Both of these policies are at the "My Organization" level of the System Tree and must be inherited by all branches of the System Tree. Organization-specific applications would be whitelisted with an organization-specific policy combined with the two Default policies into one effective policy.
Checks: C-14570r944856_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. For the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. Verify that the Trellix Applications Default Rules policy is part of the assigned policies applied to the system being reviewed. If the Trellix Applications Default Rules policy is not part of the assigned polices applied to the system being reviewed, this is a finding.

Fix: F-14568r944857_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. For the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. Click on the "New Policy Instance" button at the bottom of the screen. Scroll down to locate the new policy instance just created. Click on the drop-down selection box for "Assigned policy:" and choose "Trellix Applications (Trellix Default)". Select the "Locked (prevent breaking inheritance below this point)" radio button. Click "Save".

b
A copy of the Trellix Default Rules policy must be part of the effective rules policy applied to every endpoint.
CM-7 - Medium - CCI-001774 - V-213343 - SV-213343r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000118
Vuln IDs
  • V-213343
  • V-74249
Rule IDs
  • SV-213343r961479_rule
  • SV-88923
To ensure Solidcore clients are only configured to STIG and organization-specific settings, an organization-specific ePO policies must be applied to all organization workstation endpoints. The Trellix Application Control installs with two Default Rules policies. The Trellix Default Rules policy includes the whitelist for commonly used applications to the platform. The Trellix Applications Default Rules policy include the whitelist for Trellix applications. Both of these policies are at the My Organization level of the System Tree and must be inherited by all branches of the System Tree. Organization-specific applications would be whitelisted with an organization-specific policy combined with the two Default policies into one effective policy.
Checks: C-14571r944859_chk

This requirement is only applicable to Windows platforms. For MAC and Linux platforms, this is Not Applicable. From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. For the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. Verify that a Rules policy copied from the Trellix Default Rules policy is part of the assigned policies applied to the system being reviewed. If a Rules policy copied from the Trellix Default Rules policy is not part of the assigned policies applied to the system being reviewed, this is a finding.

Fix: F-14569r944860_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. For the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. Click on the "New Policy Instance" button at the bottom of the screen. Scroll down to locate the new policy instance just created. Click on the drop-down selection box for "Assigned policy:" and choose "Trellix Default)". Select the "Locked (prevent breaking inheritance below this point)" radio button. Click "Save".

b
The organization-specific Rules policies must be part of the effective rules policy applied to all endpoints.
CM-7 - Medium - CCI-001774 - V-213344 - SV-213344r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000119
Vuln IDs
  • V-213344
  • V-74251
Rule IDs
  • SV-213344r961479_rule
  • SV-88925
To ensure Solidcore clients are only configured to STIG and organization-specific settings, an organization-specific ePO policies must be applied to all organization workstation endpoints. The Trellix Application Control installs with two Default Rules policies. The Trellix Default Rules policy includes the whitelist for commonly used applications to the platform. The Trellix Applications Default Rules policy include the whitelist for Trellix applications. Both of these policies are at the "My Organization" level of the System Tree and must be inherited by all branches of the System Tree. Organization-specific applications would be whitelisted with an organization-specific policy combined with the two Default policies into one effective policy.
Checks: C-14572r944862_chk

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. For Windows Platforms, select the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. For MAC/Linux Platforms,select the "Application Control Rules (Unix)" Category, click on "Edit Assignments" under the "Actions" column. Verify that there exists at least one organization-specific Rules policy as part of the assigned policies applied to the system being reviewed. If an organization-specific Rules policy is not part of the assigned polices applied to the system being reviewed, this is a finding. If the only "Application Control Rules" policy applied to the system is the "Trellix Default" policy, this is a finding.

Fix: F-14570r505068_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: Application Control. For Windows Platforms, for the "Application Control Rules (Windows)" Category, click on "Edit Assignments" under the "Actions" column. For MAC/Linux Platforms, for the "Application Control Rules (Unix)" Category, click on "Edit Assignments" under the "Actions" column. Click on the "New Policy Instance" button at the bottom of the screen. Scroll down to locate the new policy instance just created. Click on the drop-down selection box for "Assigned policy:" and choose the organization-specific policy for the system being reviewed. If one does not exist, click "New Policy" and create a new policy based upon organization's written policy. Click "Save".

b
The organization-specific Solidcore Client Policies must be created and applied to all endpoints.
CM-7 - Medium - CCI-001774 - V-213345 - SV-213345r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000120
Vuln IDs
  • V-213345
  • V-74253
Rule IDs
  • SV-213345r961479_rule
  • SV-88927
Trellix Application Control is deployed with default policies. To ensure the default policies are not used and that an organization knowingly configures their systems to their own configuration requirements, organization-specific policies will need to be created.
Checks: C-14573r944864_chk

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: General. From the "Policy" column, select the policy associated with the Category "Configuration (Client)" that is specific to the organization. If the only "Configuration (Client)" policy applied to the system is the "Trellix Default" policy, this is a finding.

Fix: F-14571r944865_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: General. From the "Actions" column, select "Edit Assignment" for the "Solidcore (Client)" Category. Next to "Assigned policy:", click on the drop-down selection box and choose an organization-specific "Solidcore (Client)" policy. Click "Save". If no organization-specific Solidcore (Client) policy exists, click on "New Policy". Choose "Trellix Default" for "Create a policy based on this existing policy". Type a unique Policy Name. Click "OK".

b
The Throttling settings must be enabled and configured to settings according to organizations requirements.
CM-7 - Medium - CCI-001774 - V-213346 - SV-213346r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000121
Vuln IDs
  • V-213346
  • V-74255
Rule IDs
  • SV-213346r961479_rule
  • SV-88929
The throttling settings regulate the data flow between the clients and Trellix ePO. The value for each category defines the number of entries that will be sent to the Trellix ePO daily. Clients start caching for the defined category when the specified threshold value is reached. After the cache is full, new data for that category is dropped and not sent to the Trellix ePO. As such, settings must be high enough to allow for all data to reach the Trellix ePO.
Checks: C-14574r505073_chk

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: General. From the "Policy" column, select the policy associated with the Category "Configuration (Client)" that is specific to the organization and select the "Throttling" tab. Verify the "Enable Throttling" check box is selected. Verify the throttling settings are configured according to organization's written policy. If the "Enable Throttling" check box is not selected, this is a finding. If the throttling settings do not match the organization's written policy or the settings are not documented in the written policy, this is a finding.

Fix: F-14572r505074_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: General. From the "Policy" column, select the policy associated with the Category "Configuration (Client)" that is specific to the organization and select the "Throttling" tab. Place a check in the "Enable Throttling" check box. Configure the throttling settings based upon organization's written policy. Click "Save".

b
The Solidcore Client Exception Rules must be documented in the organizations written policy.
CM-7 - Medium - CCI-001774 - V-213347 - SV-213347r961479_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
MCAC-TE-000123
Vuln IDs
  • V-213347
  • V-74257
Rule IDs
  • SV-213347r961479_rule
  • SV-88931
When exceptions are created for applications, it results in potential attack vectors. As such, exceptions should only be created with a full approval by the local ISSO/ISSM. The organization's entire written policy requires approval by the ISSO/ISSM/AO and is required to be under CAB/CCB oversight.
Checks: C-14575r505076_chk

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset to be validated. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: General. For Windows platforms, from the "Policy" column, select the policy associated with the Category "Exception Rules (Windows)" that is specific to the organization. For Unix Platforms, from the "Policy" column, select the policy associated with the Category "Exception Rules (Unix)" that is specific to the organization. If the "Exception Rules" policy applied to the system has exceptions documented, verify the exceptions are documented in the organization's written policy. If the Exceptions are not documented, this is a finding.

Fix: F-14573r505077_fix

From the ePO server console System Tree, select the "Systems" tab. Select "This Group and All Subgroups". Select the asset. Select "Actions". Select "Agent". Select "Modify Policies on a Single System". From the product pull-down list, select Solidcore 8.x: General. For Windows Platforms, from the "Policy" column, select the policy associated with the Category "Exception Rules (Windows)" that is specific to the organization. For MAC/Unix Platforms, from the "Policy" column, select the policy associated with the Category "Exception Rules (Unix)" that is specific to the organization. Remove any exceptions which are not documented in the organization's written policy. If any exceptions are required, follow the formal change and acceptance process to document the required exceptions in the organization's written policy.