Suspicious Change to Authentication Method (via auditlogs)

title: Suspicious Change to Authentication Method (via auditlogs)
id: 5a3cfb4b-b7de-5f6d-b73a-c1220c71d569
status: stable
description: This rule detects to authentication method could be an indicator of an adversary adding an auth method to the account so they can have continued access.
references:
    - https://attack.mitre.org/techniques/T1098/
    - https://attack.mitre.org/techniques/T1556/
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts
author: Huntrule Team
date: 2026-03-16
tags:
    - attack.privilege-escalation
    - attack.credential-access
    - attack.defense-impairment
    - attack.t1556
    - attack.persistence
    - attack.t1098
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        LoggedByService: 'Authentication Methods'
        Category: 'UserManagement'
        OperationName: 'User registered security info'
    condition: selection
falsepositives:
    - Unknown
level: medium