Malicious NotDoor Outlook VBA Persistence via VbaProject.OTM Deployment (via process_creation)

ATT&CK techniques

Execution → Persistence

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
- T1137Office Application Startup
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects command lines that copy a staging file into the Outlook VbaProject.OTM macro container used by the NotDoor backdoor for persistence. Overwriting VbaProject.OTM lets attacker VBA code execute on Outlook startup and mail events.

Reporting behind it

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Malicious NotDoor Outlook VBA Persistence via VbaProject.OTM Deployment (via process_creation)

Pivot detection · T1059.001 · 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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