Malicious DarkMe COM Object Execution via rundll32 CLSID

ATT&CK techniques

Persistence → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1546.015Component Object Model Hijacking
Priv Esc
- T1546.015Component Object Model Hijacking
Defense Evasion
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects rundll32.exe instantiating the DarkMe malware COM object by its hardcoded CLSID EA6FC2FF-7AE6-4534-9495-F688FEC7858C. This chain is used by actors exploiting the WinRAR CVE-2023-38831 zero-day to load GuLoader and Remcos. Executing malicious code through a COM CLSID abuses a trusted binary to evade detection.

Reporting behind it

Related detections9 linkedT1218.011 — drag to rearrange

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Malicious DarkMe COM Object Execution via rundll32 CLSID

Pivot detection · T1218.011 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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