Sigma rule: Suspicious Login Activity Classified By Google

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-9a88163e9ea3, updated 2026-09-14T00:00:00.000Z.

Rule

Title
Suspicious Login Activity Classified By Google
Status
experimental
Level
medium
Author
Tom Kluter
Date
2026-04-28
Modified
2026-09-14
File
rules/cloud/gcp/gworkspace/login/gcp_gworkspace_suspicious_login.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Google Workspace login activity that's classified as suspicious by Google.

Log source

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

False positives (as the rule lists them)

  • Legitimate logins

Tags

  • attack.initial-access
  • attack.privilege-escalation
  • attack.persistence
  • attack.stealth
  • attack.t1078.004

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/gcp/gworkspace/login/gcp_gworkspace_suspicious_login.yml

Sources and licences

  • SigmaHQ

    "Suspicious Login Activity Classified By Google" by Tom Kluter (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/gcp/gworkspace/login/gcp_gworkspace_suspicious_login.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Suspicious Login Activity Classified By Google",
entity page, dataset version ref-9a88163e9ea3, updated 2026-09-14T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/38360161-76c4-4283-842e-efcf997dafc8 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 38360161-76c4-4283-842e-efcf997dafc8, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.