Suspicious Windows Service Masquerading as Windows Defend by APT41 (via registry_set)

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1543.003Windows Service
Priv Esc
- T1543.003Windows Service
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a Windows service registry key named Windows Defend, a deliberate misspelling of Windows Defender used by APT41 to blend malicious persistence with legitimate security tooling. Services impersonating security products are a defense evasion technique that grants persistent SYSTEM execution.

Reporting behind it

Related detections9 linkedT1543.003 — drag to rearrange

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Suspicious Windows Service Masquerading as Windows Defend by APT41 (via registry_set)

Pivot detection · T1543.003 · 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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