Malicious Regsvr32 ShellExec_RunDLL Proxy Execution (via process_creation)
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-09-09
- Updated
- 2026-09-09
ATT&CK techniques
Defense EvasionRecon
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 regsvr32 invoking shell32.dll ShellExec_RunDLL with the unregister and silent flags, a proxy execution trick used by Raspberry Robin to run commands through a trusted binary. This LOLBIN pattern is used to evade application controls and is not produced by normal component registration.
Reporting behind it
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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