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Detection rules › Sigma

Google Workspace Granted Domain API Access

Status
test
Severity
medium
Log source
product gcp, service google_workspace.admin
Author
Austin Songer
Source
github.com/SigmaHQ/sigma

Detects when an API access service account is granted domain authority.

MITRE ATT&CK coverage

TacticTechniques
Persistence
Privilege Escalation

Telemetry coverage

PlatformRecord / event type
Google WorkspaceAUTHORIZE_API_CLIENT_ACCESS: API Client Access Authorize

Rule body

title: Google Workspace Granted Domain API Access
id: 04e2a23a-9b29-4a5c-be3a-3542e3f982ba
status: test
description: Detects when an API access service account is granted domain authority.
references:
    - https://cloud.google.com/logging/docs/audit/gsuite-audit-logging#3
    - https://developers.google.com/admin-sdk/reports/v1/appendix/activity/admin-domain-settings#AUTHORIZE_API_CLIENT_ACCESS
author: Austin Songer
date: 2021-08-23
modified: 2023-10-11
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1098
logsource:
    product: gcp
    service: google_workspace.admin
detection:
    selection:
        eventService: admin.googleapis.com
        eventName: AUTHORIZE_API_CLIENT_ACCESS
    condition: selection
falsepositives:
    - Unknown

level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    eventService: admin.googleapis.com
    eventName: AUTHORIZE_API_CLIENT_ACCESS

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
eventNameeq
  • AUTHORIZE_API_CLIENT_ACCESS
field:"aws::eventName" kind:eq value:"AUTHORIZE_API_CLIENT_ACCESS"
eventServiceeq
  • admin.googleapis.com
field:"gcp::service_name" kind:eq value:"admin.googleapis.com"