Malicious IcedID Loader Execution via Rundll32 from Excel Macro (via process_creation)

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1059.005Visual Basic
Persistence
Priv Esc
Defense Evasion
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects Excel spawning rundll32 to load a .dat file through the DllRegisterServer export, the execution chain used by IcedID campaigns delivered through Excel 4.0 macros. A spreadsheet launching a renamed DLL export marks weaponized document execution leading to banking trojan installation.

Reporting behind it

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Malicious IcedID Loader Execution via Rundll32 from Excel Macro (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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