Malicious Marbled Dust OMServerService VBScript Dropped to Startup Folder

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547.001Registry Run Keys / Startup Folder
Priv Esc
- T1547.001Registry Run Keys / Startup Folder
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the creation of OMServerService.vbs inside the Start Menu Startup folder. Microsoft observed the Marbled Dust actor abusing an Output Messenger zero-day to drop this file via path traversal for persistence. Placing a VBScript in the Startup folder guarantees execution at logon, so this file event strongly indicates the espionage intrusion.

Reporting behind it

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Malicious Marbled Dust OMServerService VBScript Dropped to Startup Folder

Pivot detection · T1547.001 · 9 related

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