Malicious Rundll32 Loading Update DLL from AppData Custom_update with scab Export

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 loading an Update DLL from a user AppData Custom_update directory and calling the scab export, the loader execution used by DanaBot to run IcedID. This proxy execution runs the malicious module under a trusted signed binary to evade application controls.

Reporting behind it

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Malicious Rundll32 Loading Update DLL from AppData Custom_update with scab Export

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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