New Github Organization Member Added

Detects when a new member is added or invited to a github organization.

Sigma rule (View on GitHub)

 1title: New Github Organization Member Added
 2id: 3908d64a-3c06-4091-b503-b3a94424533b
 3status: test
 4description: Detects when a new member is added or invited to a github organization.
 5author: Muhammad Faisal (@faisalusuf)
 6date: 2023/01/29
 7references:
 8    - https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-security-settings-for-your-organization/reviewing-the-audit-log-for-your-organization#dependabot_alerts-category-actions
 9tags:
10    - attack.persistence
11    - attack.t1136.003
12logsource:
13    product: github
14    service: audit
15    definition: 'Requirements: The audit log streaming feature must be enabled to be able to receive such logs. You can enable following the documentation here: https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/streaming-the-audit-log-for-your-enterprise#setting-up-audit-log-streaming'
16detection:
17    selection:
18        action:
19            - 'org.add_member'
20            - 'org.invite_member'
21    condition: selection
22falsepositives:
23    - Organization approved new members
24level: informational

References

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