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How to create an Application Control exception or stop sysfer.dll injection into a process with Endpoint Protection


Article ID: 181736


Updated On:


Endpoint Protection


The Symantec Endpoint Protection (SEP) and Symantec Endpoint Security (SES) Application Control feature relies on injection of a DLL (sysfer.dll) into processes being launched on the machine. Some applications may be incompatible with this behavior. How can a particular process be excluded from Application Control monitoring with SEP/SES?


Exception (or exclusion) policies can be created in the Symantec Endpoint Protection Manager (SEPM) under Policies - Exceptions:

  • With SEP 14.x Application Control exceptions are created via: Add - Windows Exceptions - File - then check the Application Control checkbox.


Exception (or exclusion) policies can be created in ICDm portal for SES clients under the Default Allow List Policy 
  • With SES Application Control Exceptions are created via: Excluded by Filename - Device Control or Excluded by Path - Device Control


Note: A reboot is necessary for the exclusions to apply.


To verify that the exception has been correctly implemented, the Microsoft Process Explorer tool can be used to check if sysfer.dll was injected inside the process.