Suspicious Rundll32 Persistence via Registry Run Key (via registry_set)

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
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a Run key value being set to launch rundll32 at logon. The malvertising backdoor established persistence by writing a Run key that invokes rundll32 against a dropped DLL. Autorun entries that proxy execution through rundll32 are a well-known persistence and defense-evasion combination.

Reporting behind it

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Suspicious Rundll32 Persistence via Registry Run Key (via registry_set)

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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