Github High Risk Configuration Disabled — Sigma Rule

Rule metadata and linked tags

Author: Muhammad Faisal (@faisalusuf). Source status: test; severity: high. Source dates: 2023-01-29 / 2024-07-22.

{
  "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"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5c0c846f2205cb89dd2db612ff7addbed86fa540c7cf57ea0d3e0d3992ac42ea

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Github High Risk Configuration Disabled
id: 8622c92d-c00e-463c-b09d-fd06166f6794
status: test
description: Detects when a user disables a critical security feature for an organization.
references:
    - https://docs.github.com/en/organizations/managing-oauth-access-to-your-organizations-data/disabling-oauth-app-access-restrictions-for-your-organization
    - 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
    - https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/enabling-features-for-your-repository/managing-security-and-analysis-settings-for-your-repository
    - https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/audit-log-events-for-your-enterprise
author: Muhammad Faisal (@faisalusuf)
date: 2023-01-29
modified: 2024-07-22
tags:
    - attack.credential-access
    - attack.persistence
    - attack.defense-impairment
    - attack.t1556
logsource:
    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:
            - 'business_advanced_security.disabled_for_new_repos'
            - 'business_advanced_security.disabled_for_new_user_namespace_repos'
            - 'business_advanced_security.disabled'
            - 'business_advanced_security.user_namespace_repos_disabled'
            - 'org.advanced_security_disabled_for_new_repos'
            - 'org.advanced_security_disabled_on_all_repos'
            - 'org.advanced_security_policy_selected_member_disabled'
            - 'org.disable_oauth_app_restrictions'
            - 'org.disable_two_factor_requirement'
            - 'repo.advanced_security_disabled'
    condition: selection
falsepositives:
    - Approved administrator/owner activities.
level: high

Original YAML and metadata in JSON

False positives

• Approved administrator/owner activities.

Source references

• https://docs.github.com/en/organizations/managing-oauth-access-to-your-organizations-data/disabling-oauth-app-access-restrictions-for-your-organization
• 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
• https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/enabling-features-for-your-repository/managing-security-and-analysis-settings-for-your-repository
• https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/audit-log-events-for-your-enterprise