Suspicious Scheduled Task Executing Rundll32 DLL Export by Ordinal

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1053.005Scheduled Task
Persistence
- T1053.005Scheduled Task
Priv Esc
- T1053.005Scheduled Task
Defense Evasion
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a scheduled task that launches rundll32.exe against a DLL export referenced by ordinal number which the IcedID actor used to persist an hourly loader on the compromised host and this matters because scheduled execution of an ordinal DLL export by rundll32 is atypical for legitimate software and reflects malware persistence.

Reporting behind it

Related detections9 linkedT1053.005 — drag to rearrange

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Suspicious Scheduled Task Executing Rundll32 DLL Export by Ordinal

Pivot detection · T1053.005 · 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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