Malicious Marbled Dust Backdoor Executing from Public Videos Directory
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-10-14
- Updated
- 2026-10-14
ATT&CK techniques
C2Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
Exfiltration
Impact
What it detects
This rule detects execution of OMServerService.exe from the c\users\public\videos path. Microsoft attributed this GoLang backdoor to Marbled Dust in the Output Messenger espionage campaign. A service executable running from a world-writable public media folder is a clear misplacement of a legitimate-looking name, marking it as the deployed backdoor.
Reporting behind it
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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