Suspicious Run Key Persistence Executing regsvr32

ATT&CK techniques

Persistence → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547.001Registry Run Keys / Startup Folder
Priv Esc
- T1547.001Registry Run Keys / Startup Folder
Defense Evasion
- T1218.010Regsvr32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a Run registry autostart value whose data invokes regsvr32, a persistence method observed in the AppleSeed triple-combo campaign that added a TripServiceUpdate entry launching regsvr32 against a malicious DLL. It captures the establishment of boot persistence combined with signed-binary proxy execution. Detecting this is important because legitimate autostart entries seldom call regsvr32 with install switches to load a DLL at logon.

Reporting behind it

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Suspicious Startup Persistence via Registry Run Key Pointing to Script

Suspicious Run Key Persistence Executing regsvr32

Pivot detection · T1547.001 · 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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