Suspicious Login Behavior Classified By Google (via google_workspace.login)

title: Suspicious Login Behavior Classified By Google (via google_workspace.login)
id: 66a1af24-cc34-5f61-8542-9b78b41a7fcb
status: stable
description: This rule detects Google Workspace login behavior that's classified as anomalous by Google.
references:
    - https://attack.mitre.org/techniques/T1078/004/
    - https://cloud.google.com/logging/docs/audit/gsuite-audit-logging
    - https://cloud.google.com/logging/docs/audit/understanding-audit-logs
    - https://developers.google.com/workspace/admin/reports/v1/appendix/activity/login#suspicious_login
    - https://developers.google.com/workspace/admin/reports/v1/appendix/activity/login#suspicious_login_less_secure_app
    - https://developers.google.com/workspace/admin/reports/v1/appendix/activity/login#suspicious_programmatic_login
author: Huntrule Team
date: 2026-07-17
tags:
    - attack.initial-access
    - attack.privilege-escalation
    - attack.persistence
    - attack.stealth
    - attack.t1078.004
logsource:
    product: gcp
    service: google_workspace.login
detection:
    selection:
        protoPayload.Servicename: 'login.googleapis.com'
        protoPayload.metadata.event.eventName:
            - 'suspicious_login_less_secure_app'
            - 'suspicious_login'
            - 'suspicious_programmatic_login'
    condition: selection
falsepositives:
    - Unknown
level: medium