Office ASR rule triggered from browser spawned office process.
The attacker sends a spearphishing email to a user. The email contains a link which points to a website that eventually presents the user a download of an MS Office document. This document contains a malicious macro.…
Description
The attacker sends a spearphishing email to a user. The email contains a link which points to a website that eventually presents the user a download of an MS Office document. This document contains a malicious macro. The macro triggers one of the ASR rules. This detection looks for Office ASR violations triggered by an Office document opened from a browser. Note: be aware that you need to have the proper ASR rules enabled for this detection to work.
Detection logic
Detection requirements
- Platform
- Identity ProviderLinuxmacOSOffice SuiteSaaSWindows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source product
- microsoftthreatprotection
- Log source service
- deviceevents
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
No references are available for this detection.
From the source
- At source
- Open at source
- Upstream identifier
- 30580043-2451-4d35-b49f-065728529f4a
- Tagged by the source as
- InitialAccess
Licence
- Published under
- MIT LicenseRead the licence
- Attribution
- Required
- Obtained under
- MITRead the origin licence
Authorship
- Published
- Sep 1, 2026
- Version
- 1