Malicious Rundll32 Loading an Export From a User Path (via process_creation)

ATT&CK techniques

Defense Evasion

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

What it detects

This rule detects rundll32.exe executing a named or ordinal export from a DLL located in AppData, ProgramData or Temp, the execution behavior IcedID and Bumblebee use to run a downloaded loader. Rundll32 export execution from user-writable paths is a defense-evasion technique tracked in the Red Canary Threat Detection Report. Detecting these invocations surfaces malware loaders running under a signed binary.

Reporting behind it

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Malicious Rundll32 Loading an Export From a User Path (via process_creation)

Pivot detection · T1218.011 · 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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