Malicious Event Log Tampering via wevtutil Channel Disable by FunkSec Ransomware (via process_creation)

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects use of wevtutil to disable the Security and Application event log channels, a defense-evasion action performed by FunkSec ransomware to blind logging before encryption. Adversaries turn off event channels so their tampering, service termination and encryption activity is not recorded for responders.

Reporting behind it

Related detections9 linkedT1685.001 — drag to rearrange

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Windows Process Creation: Registry Modification to Disable ETW AutoLogger via reg.exe or PowerShell

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Malicious Event Log Tampering via wevtutil Channel Disable by FunkSec Ransomware (via process_creation)

Pivot detection · T1685.001 · 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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