title: Suspicious Login Activity Classified By Google
id: 38360161-76c4-4283-842e-efcf997dafc8
status: experimental
description: Detects Google Workspace login activity that's classified as suspicious by Google.
references:
- 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: Tom Kluter
date: 2026-04-28
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:
- Legitimate logins
level: medium