Suspicious Disabling of Google Workspace MFA (via google_workspace.admin)

title: Suspicious Disabling of Google Workspace MFA (via google_workspace.admin)
id: 9637dcc5-5786-59d9-8d11-6aabae15fdc1
status: stable
description: This rule detects when multi-factor authentication (MFA) is disabled.
references:
    - https://cloud.google.com/logging/docs/audit/gsuite-audit-logging#3
    - https://developers.google.com/admin-sdk/reports/v1/appendix/activity/admin-security-settings#ENFORCE_STRONG_AUTHENTICATION
    - https://developers.google.com/admin-sdk/reports/v1/appendix/activity/admin-security-settings?hl=en#ALLOW_STRONG_AUTHENTICATION
author: Huntrule Team
date: 2026-06-30
tags:
    - attack.impact
    - attack.defense-evasion
    - attack.persistence
    - attack.t1556
logsource:
    product: gcp
    service: google_workspace.admin
detection:
    selection_base:
        eventService: admin.googleapis.com
        eventName:
            - ENFORCE_STRONG_AUTHENTICATION
            - ALLOW_STRONG_AUTHENTICATION
    selection_eventValue:
        new_value: 'false'
    condition: all of selection*
falsepositives:
    - Unknown
level: medium