Malicious Windows Defender Exclusion Added (via registry_set)

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 new Windows Defender exclusion entries for paths or processes, a defense evasion step used by Raspberry Robin to prevent detection of its payloads. Attacker-driven exclusion writes let malware run unscanned, so unexpected additions to the Defender Exclusions keys are high-value indicators.

Reporting behind it

Related detections9 linkedT1685 — drag to rearrange

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Suspicious Defender Exclusion Added via Add-MpPreference by GachiLoader

Suspicious TCC AppleEvents Reset via tccutil

Malicious Defender Real Time Monitoring Disabled via Set-MpPreference

Windows Defender Tampering via Set-MpPreference and Exclusions

Suspicious Windows Defender Real-Time Protection Disabled via Policy Registry by Cephalus Ransomware

Suspicious Microsoft Defender Path Exclusion of User Directories (via process_creation)

Malicious Windows Defender Tampering via Set-MpPreference (via process_creation)

Malicious Windows Defender Exclusion Added (via registry_set)

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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