Ruler
MITRE ATT&CK: S0358 View on attack.mitre.org
Aliases: Ruler
- First seen
- 2017-07-01 00:00:00
- Malware type
- exploit-kit
- Operating systems
- windows, office-suite
- Profile updated
- 2026-07-07 15:33:14
Context
Ruler is a tool to abuse Microsoft Exchange services. It is publicly available on GitHub and the tool is executed via the command line. The creators of Ruler have also released a defensive tool, NotRuler, to detect its usage.
Detection coverage
- 1 Sigma rules
Malware & tools used
- Outlook Rules (attack-pattern)
- Outlook Forms (attack-pattern)
- Outlook Home Page (attack-pattern)
- Email Account (attack-pattern)
Used by threat actors
- APT33 (threat-actor)
Reports & references
- MITRE ATT&CK — S0358 (report)
- github.com — Notruler (report)
- github.com — Ruler (report)