Google Cloud Service Account Modified

 1title: Google Cloud Service Account Modified
 2id: 6b67c12e-5e40-47c6-b3b0-1e6b571184cc
 3status: test
 4description: Identifies when a service account is modified in Google Cloud.
 5references:
 6    - https://cloud.google.com/iam/docs/reference/rest/v1/projects.serviceAccounts
 7author: Austin Songer @austinsonger
 8date: 2021-08-14
 9modified: 2022-10-09
10tags:
11    - attack.impact
12logsource:
13    product: gcp
14    service: gcp.audit
15detection:
16    selection:
17        gcp.audit.method_name|endswith:
18            - .serviceAccounts.patch
19            - .serviceAccounts.create
20            - .serviceAccounts.update
21            - .serviceAccounts.enable
22            - .serviceAccounts.undelete
23    condition: selection
24falsepositives:
25    - Service Account being modified may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
26    - Service Account modified from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
27level: medium