Malicious Windows Defender Disablement via MpCmdRun RemoveDefinitions

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 MpCmdRun.exe removing all antivirus definitions and disabling real-time monitoring, a defense evasion step performed by Spirals ransomware operators before deploying the encryptor.

Reporting behind it

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Malicious Windows Defender Disablement via MpCmdRun RemoveDefinitions

Pivot detection · T1685 · 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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