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Exploit Mitigation: Prevent Credential Theft / Prevent Privilege Escalation Exclusions?

Justin Rutkowski

We are attempting to run an Active Directory migration tool on our domain controllers, the migration tool is called Quest Migration Manager. 

Sophos was originally blocking some of the background processes with the software and throwing CredGuard errors in Event Viewer. After implementing a policy were it excluded several processes and folders with the software, the error in Event Viewer went away. The software is still not working properly, and after much testing it was revealed that when we had "Prevent Credential Theft" and "Prevent Privilege Escalation" unselected in the Runtime Protection>Protect Processes portion of the policy, the software works just fine.

Since this software would need to work on about 6 or 7 domain controllers, our organization is a bit apprehensive about disabling "Prevent Credential Theft" and "Prevent Privilege escalation" on our domain controllers. Does anyone have any idea on where to begin on where we could program an exclusion in for these two processes? 

I have just about every other crucial process with the software in a global exclusion policy but the software just won't work until "Prevent Credential Theft" and "Prevent Privilege escalation" are unchecked. 



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  • 0 in reply to Odear

    Yes. Before programming ANY policy exclusions, running the software would generate a Event ID: 911 HitmanPro.Alert in Event Viewer>Windows Applications. 

    After we programmed in the exclusions for the application, the 911 Events stopped. When this alert was generated though, I only saw it on Event Viewer on the device itself. I did not see any alert entries generated within Sophos Central.

    I did see the registry entry for the WhiteThumbprints, but there doesn't appear to be any location where I can enter plugin the value data for this entry in Sophos Central?

  • 0 in reply to Justin Rutkowski

    Hi,

    Whitethumbprints are exclusively generated by our development team. You would need to create a support case (sounds like you have already) and it would need to be sent to development with an example of the EXE in question for them to eval if they can create a thumbprint. Not all requests are accepted because a thumbprint needs to be specific enough that it doesn't allow compromise of the system.

    As another note, exclusions for EXEs don't apply to the InterceptX exploit mitigation detections - so you can exclude a EXE from being scanned by the endpoint but if it stills does an action that would trigger an exploit mitigation then it will still be blocked. Some of the mitigations can have exclusions applied (ie you can unload the driver from those types of EXEs and therefore the EXE can do what it wants) - however, for the specific case of this software I couldn't give you advice on how to craft the right policy without seeing the exact behaviour of the EXE. Support should be able to though.,

    RichardP

    Program Manager, Support Readiness | CISSP | Sophos Technical Support
    Support Videos | Product Documentation | @SophosSupport | Sign up for SMS Alerts
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  • 0 in reply to RichardP

    Thank you Richard for the explanation. I suppose that explains why all my exploit mitigations were in vain and didn't do anything. I'll follow up with my support ticket to see if they can offer any insight. 

    Thank you everyone for your time and assistance.

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