UAC Bypass Using Windows Media Player - Registry

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About the rule

Rule Type

Standard

Rule Description

Detects the pattern of UAC Bypass using Windows Media Player osksupport.dll (UACMe 32)

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Registry value modified" AND (OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Store\C:\Program Files\Windows Media Player\osk.exe" OR (OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Store\C:\Program Files\Windows Media Player" AND OBJECTVALUENAME = "osk.exe")) AND INFORMATION = "Binary Data" select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Christian Burkard (Nextron Systems)