title: Github Outside Collaborator Detected
id: eaa9ac35-1730-441f-9587-25767bde99d7
status: experimental
description: Detects  when an organization member or outside collaborator is added to or removed from a project board or has their permission level changed or when an owner removes an outside collaborator from an organization or when two-factor authentication is required in an organization and an outside collaborator does not use 2FA or disables 2FA.
author: Muhammad Faisal
date: 2023/01/20
references:
    - https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-security-settings-for-your-organization/reviewing-the-audit-log-for-your-organization#audit-log-actions
    - https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-two-factor-authentication-for-your-organization/requiring-two-factor-authentication-in-your-organization
tags:
    - attack.t1098.001
    - attack.t1213.003
    - attack.t1098.003
logsource:
    product: github
    service: audit
detection:
    selection:
        operation: 'authentication'
        action:
            - 'project.update_user_permission'
            - 'org.remove_outside_collaborator'
    condition: selection
fields:
    - 'action'
    - 'actor'
    - 'org'
    - 'actor_location.country_code'
falsepositives:
    - Validate the actor if permitted to access the repo.
    - Validate the Multifactor Authentication changes.
level: medium