Configure the Gatekeeper Enhancement MPM

1. Configure a new malware protection rule.
   Select PoliciesMalwareProtection Modules.
2. Select macOS as the operating system (the Gatekeeper Enhancement MPM is not supported on Windows endpoints).
3. From the action menu
   , select Add.
4. Select Gatekeeper Enhancement and configure the rule settings:
   • Activation—Select On to enable the gatekeeper enhancement MPM or Off to disable it.
   • Action—Select the action to take when Traps detects a child process which does not match or exceed the configured signature level: Block the behavior (Prevention), or permit the behavior and log the issue (Notification). Alternatively, you can choose to Inherit the behavior from the preceding rule in the rule hierarchy.
     To view additional details about the default policy, select Policies > Malware > Protection Modules, and then select Show Default Rules from the action menu.
   • User Alert—Specify the notification behavior when Traps detects a child process which does not match or exceed the configured signature level, either On to notify the user, or Off to suppress notifications. Alternatively, you can choose to Inherit the behavior from the preceding rule in the rule hierarchy.
5. Select the signature Verification Level:
   • By Parent—(Default) The child process must match the signature level of the parent process.
   • Block All—Block all child processes regardless of signature level.
   • Apple System—The child process must be signed by Apple.
   • Mac App Store—The child process must be signed by the App Store.
   • Developers—The child process must be signed by a registered developer.
6. (Optional) Whitelist child processes run from specific locations:
   1. Select the add folder icon
      .
   2. Enter the full path for the child process, for example:

      /Applications/myapp1.app/Contents

   3. Repeat the process to add any additional child processes, if desired.
   4. Select the Whitelist Action to Merge or Override the child process list with lists defined in other user-defined or default policy rules for the parent process.
      If multiple rules exist for the same parent process that specify Whitelist Action: Merge, Traps consolidates the Whitelist. If multiple rules exist for the same parent process that specify Whitelist Action: Override, only the most recent rule (with the highest ID number) takes precedence.

      If multiple rules exist for the same parent process but use different list behaviors (for example, one as a whitelist and one as a blacklist), only the most recent rule (with the highest ID number) takes precedence.
7. Select the Processes tab and Add one or more source (parent) processes to which Traps will apply the Gatekeeper Enhancement MPM. As you type, the ESM Console provides auto-completion based on the list of processes defined in the ESM Console.
8. (Optional) Add Conditions to the rule. By default, a new rule does not contain any conditions.
   To specify a condition, select the Conditions tab, select the condition in the Conditions list, and then Add it to the Selected Conditions list. Repeat this step to add more conditions, as needed. You can also define new Conditions.
9. (Optional) Define the Target Objects to which to apply the rule.
   To define a smaller subset of target objects, select the Objects tab, and then enter one or more AD Users, AD Computers, AD Groups, AD Organizational Unit, Existing Endpoints, or Existing Groups in the Include or Exclude areas. The Endpoint Security Manager queries Active Directory to verify the users, computers, groups, or organizational units. The ESM Console also offers autocompletion as you type for existing endpoints and existing virtual groups.
10. (Optional) Review the rule name and description. The ESM Console automatically generates the rule name and description based on the rule details but permits you to change these fields, if needed.
    To override the autogenerated name, select the Name tab, clear the Activate automatic description option, and then enter a rule name and description of your choice.
11. Save the exploit protection rule.
    Do either of the following:

    • Save the rule without activating it. This option is only available for inactive, cloned, or new rules. When you are ready to activate the rule, select the rule from the PoliciesExploitProtection Modules page and then click Activate.
    • Apply the rule to activate it immediately.

    After saving or applying a rule, you can return to the Protection Modules page at any time to Delete or Deactivate the rule.