Malicious UAC Bypass via DllHost ICMLuaUtil Elevated COM Interface in ValleyRat Campaign (via process_creation)

ATT&CK techniques

Priv Esc → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1548.002Bypass User Account Control
Defense Evasion
- T1548.002Bypass User Account Control
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects DllHost.exe launched with the ICMLuaUtil elevated COM CLSID 3E5FC7F9-9A51-4367-9063-A120244FBEC7, the auto-elevation interface abused by the Silver Fox ValleyRat loader to bypass User Account Control. Adversaries leverage this elevated COM object to obtain administrator rights without a prompt, making detection valuable for catching privilege escalation during the intrusion.

Reporting behind it

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Malicious UAC Bypass via DllHost ICMLuaUtil Elevated COM Interface in ValleyRat Campaign (via process_creation)

Pivot detection · T1548.002 · 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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