Suspicious MoustachedBouncer Scheduled Task Running Executable from SMB Share via Schtasks (via process_creation)

ATT&CK techniques

Execution → Priv Esc

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

What it detects

This rule detects creation of a scheduled task that executes the masquerading binary OfficeBroker.exe, a technique used by the MoustachedBouncer espionage group against foreign diplomats in Belarus to run a payload from an SMB share every minute. Attackers rely on scheduled tasks for stealthy execution and persistence, so catching this reveals active backdoor tasking.

Reporting behind it

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Suspicious MoustachedBouncer Scheduled Task Running Executable from SMB Share via Schtasks (via process_creation)

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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