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Disabled MFA to Bypass Authentication Mechanisms

Detection for when multi factor authentication has been disabled, which might indicate a malicious activity to bypass authentication mechanisms.

MITRE ATT&CK

T1556

defense-evasioncredential-accesspersistence

Detection Query

selection:
  eventSource: AzureActiveDirectory
  eventName: Disable Strong Authentication.
  status: success
condition: selection

Author

@ionsor

Created

2022-02-08

Data Sources

azureactivitylogs

Platforms

azure

References

https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-userstates

Tags

attack.defense-evasionattack.credential-accessattack.persistenceattack.t1556

Raw Content

title: Disabled MFA to Bypass Authentication Mechanisms
id: 7ea78478-a4f9-42a6-9dcd-f861816122bf
status: test
description: Detection for when multi factor authentication has been disabled, which might indicate a malicious activity to bypass authentication mechanisms.
references:
    - https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-userstates
author: '@ionsor'
date: 2022-02-08
tags:
    - attack.defense-evasion
    - attack.credential-access
    - attack.persistence
    - attack.t1556
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        eventSource: AzureActiveDirectory
        eventName: 'Disable Strong Authentication.'
        status: success
    condition: selection
falsepositives:
    - Authorized modification by administrators
level: medium