.. /Verclsid.exe

Star

Paths:

• C:\Windows\System32\verclsid.exe
• C:\Windows\SysWOW64\verclsid.exe

Resources:

• https://gist.github.com/NickTyrer/0598b60112eaafe6d07789f7964290d5
• https://bohops.com/2018/08/18/abusing-the-com-registry-structure-part-2-loading-techniques-for-evasion-and-persistence/

Acknowledgements:

• Nick Tyrer (@NickTyrer)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/process_creation/proc_creation_win_verclsid_runs_com.yml
• Splunk: https://github.com/splunk/security_content/blob/a1afa0fa605639cbef7d528dec46ce7c8112194a/detections/endpoint/verclsid_clsid_execution.yml

Execute

1. Used to verify a COM object before it is instantiated by Windows Explorer

   verclsid.exe /S /C {CLSID}

   Use case

   Run a com object created in registry to evade defensive counter measures

   Privileges required

   User

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1218.012