Disabled MFA to Bypass Authentication Mechanisms

calendar Oct 23, 2025 · attack.defense-evasion attack.credential-access attack.persistence attack.t1556  ·
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Detection for when multi factor authentication has been disabled, which might indicate a malicious activity to bypass authentication mechanisms.

Sigma rule (View on GitHub)

 1title: Disabled MFA to Bypass Authentication Mechanisms
 2id: 7ea78478-a4f9-42a6-9dcd-f861816122bf
 3status: test
 4description: Detection for when multi factor authentication has been disabled, which might indicate a malicious activity to bypass authentication mechanisms.
 5references:
 6    - https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-userstates
 7author: '@ionsor'
 8date: 2022-02-08
 9tags:
10    - attack.defense-evasion
11    - attack.credential-access
12    - attack.persistence
13    - attack.t1556
14logsource:
15    product: azure
16    service: activitylogs
17detection:
18    selection:
19        eventSource: AzureActiveDirectory
20        eventName: 'Disable Strong Authentication.'
21        status: success
22    condition: selection
23falsepositives:
24    - Authorized modification by administrators
25level: medium

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