Multifactor Authentication Denied
User has indicated they haven't instigated the MFA prompt and could indicate an attacker has the password for the account.
Detection logic
Detection requirements
- Platform
- ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows
The rule states no platform. This is derived from the 3 ATT&CK techniques it maps to.
- Log source product
- azure
- Log source service
- signinlogs
Known benign triggers
- Users actually login but miss-click into the Deny button when MFA prompt.
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 |
|---|---|
| www.microsoft.com/security/blog/2022/03/22/dev-0537-criminal-actor-targeting-organizations-for-data-exfiltration-and-destruction/ | Only this detection cites it |
From the source
- At source
- Open at source
- Upstream identifier
- e40f4962-b02b-4192-9bfe-245f7ece1f99
- 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