Query: Sigma YAML for github / audit
Matching passage: Sigma rule: Detects when an organization member or an outside collaborator is added to or removed from a project board or has their. Logsource: github / audit. Rule: title: Github Outside Collaborator Detected id: eaa9ac35-1730-441f-9587-25767bde99d7 status: test description: 'Detects when an organization member or an 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 (@faisalusuf) 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.privilege-escalation - attack.persistence - attack.collection - attack.t1098.001 - attack.t1098.003 - attack.t1213.003 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: - org.remove_outside_collaborator - project.update_user_permission condition: selection falsepositives: - Validate the actor if permitted to access the repo. - Validate the Multifactor Authentication changes. level: medium
Near-miss passage: Sigma rule: Detects execution of msdt.exe using the "cab" flag which could indicates suspicious diagcab files with embedded answer f. Logsource: windows / process_creation. Rule: title: Suspicious Cabinet File Execution Via Msdt.EXE id: dc4576d4-7467-424f-9eee-fd2b02855fe0 related: - id: 6545ce61-a1bd-4119-b9be-fcbee42c0cf3 type: obsolete status: test description: Detects execution of msdt.exe using the "cab" flag which could indicates suspicious diagcab files with embedded answer files leveraging CVE-2022-30190 references: - https://twitter.com/nas_bench/status/1537896324837781506 - https://github.com/GossiTheDog/ThreatHunting/blob/e85884abbf05d5b41efc809ea6532b10b45bd05c/AdvancedHuntingQueries/DogWalk-DiagCab - https://github.com/elastic/protections-artifacts/commit/746086721fd385d9f5c6647cada1788db4aea95f#diff-9015912909545e72ed42cbac4d1e96295e8964579c406d23fd9c47a8091576a0 - https://irsl.medium.com/the-trouble-with-microsofts-troubleshooters-6e32fc80b8bd author: Nasreddine Bencherchali (Nextron Systems), GossiTheDog, frack113 date: 2022-06-21 modified: 2024-03-13 tags: - attack.stealth - attack.t1202 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \msdt.exe - OriginalFileName: msdt.exe selection_cmd: CommandLine|contains|windash: ' -cab ' condition: all of selection_* falsepositives: - Legitimate usage of ".diagcab" files level: medium