Detection rules › Sigma

Github High Risk Configuration Disabled

Status
test
Severity
high
Log source
product github, service audit
Author
Muhammad Faisal (@faisalusuf)
Source
github.com/SigmaHQ/sigma

Detects when a user disables a critical security feature for an organization.

MITRE ATT&CK coverage

Event coverage

Rules detecting the same action

Other rules on this platform that filter on the same API call or operation.

Rule body yaml

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

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

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'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
actioneq
  • business_advanced_security.disabled
  • business_advanced_security.disabled_for_new_repos
  • business_advanced_security.disabled_for_new_user_namespace_repos
  • 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