SwimSnake AutoRecoverDat.dll Execution via rundll32 or regsvr32 (via process_creation)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1218.010Regsvr32
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects rundll32.exe or regsvr32.exe executing AutoRecoverDat.dll, the module the SwimSnake (Silver Fox) group drops into the user AppData Embarcadero folder to load shellcode and deploy the WinOS backdoor. Adversaries proxy execution of the malicious DLL through trusted signed binaries to evade application controls, making early detection critical for catching the loader before backdoor communication.

Reporting behind it

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SwimSnake AutoRecoverDat.dll Execution via rundll32 or regsvr32 (via process_creation)

Pivot detection · T1218.010 · 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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