Red Sift - New email with URL from previously unseen sender
Detects email forensics events that contain one or more URLs where the sender in the from field has not been seen in the previous 14 days, which may indicate phishing activity or a newly observed sender.
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
- redsiftpush
- Log source service
- redsiftemailforensics_cl
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
- 6e0b70d4-0ab8-480e-9707-8ad45fc21a65
- 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