Use of Legacy Authentication Protocols
Alert on when legacy authentication has been used on an account
Detection logic
Detection requirements
- Platform
- ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows
The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.
- Log source product
- azure
- Log source service
- signinlogs
Known benign triggers
- User has been put in acception group so they can use legacy authentication
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
References
| Reference | Cited by |
|---|---|
| learn.microsoft.com/en-gb/entra/architecture/security-operations-privileged-accounts | 3 |
From the source
- At source
- Open at source
- Upstream identifier
- 60f6535a-760f-42a9-be3f-c9a0a025906e
- Tagged by the source as
- attack.credential-accessattack.initial-accessattack.persistenceattack.privilege-escalationattack.stealth
Licence
- Published under
- Detection Rule License 1.1Read the licence
- Attribution
- Required
Authorship
- Written by
- Published
- Aug 26, 2026
- Version
- 1