RoguePlanet CVE-2026-50656: Defender Quarantine Artifact Overwrite via wermgr.exe
This rule monitors for suspicious activity involving wermgr.exe and Windows Defender quarantine directory. It detects wermgr.exe being written to or executed from non-standard temporary paths (often associated with potential junction-redirected payload execution), non-MsMpEng processes writing to the Windows Defender quarantine folder, and the creation of NTFS Alternate Data Streams (ADS) named :WDFOO within temporary directories.
Splunk (SPL)
