Sigma rule: New Github Organization Member Added

Rule

Title

New Github Organization Member Added

Status

test

Level

informational

Author

Muhammad Faisal (@faisalusuf)

Date

2023-01-29

File

rules/application/github/audit/github_new_org_member.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product

github

service

audit

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

Detection

selection:
    action:
        - 'org.add_member'
        - 'org.invite_member'
condition: selection

False positives (as the rule lists them)

• Organization approved new members

Tags

• attack.persistence
• attack.t1136.003

MITRE ATT&CK ids this rule names

• T1136.003

References

• 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

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/application/github/audit/github_new_org_member.yml