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Nasreddine Bencherchali
11c909f725
* Add YAML formatting and validation infrastructure - Add yamlfmt configuration (.yamlfmt) with 4-space indent, LF line endings - Add yamllint configuration (.yamllint) for syntax validation (detections/ only) - Add pre-commit hook for automatic YAML formatting - Add CI validation script with unified error output - Add GitHub Actions workflow for PR validation - Add documentation for setup and usage - Support custom yamlfmt binary path via --yamlfmt-path flag * comment yaml check from pre-commit * apply yamlfmt * Update yaml-validation.yml * Update yaml-validation.yml * application folder search formatting * cloud folder search formatting * web folder search formatting * network folder search formatting * endpoint folder search formatting * resolve first conflict * apply formatting * remove additional pipe * Update README.md * update versions * restore and update formatting (#3920) --------- Co-authored-by: Bhavin Patel <bhavin.j.patel91@gmail.com>
64 lines
3.8 KiB
YAML
64 lines
3.8 KiB
YAML
name: GitHub Organizations Disable 2FA Requirement
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id: 3ed0d6ba-4791-4fa8-a1ef-403e438c7033
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version: 5
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date: '2026-02-25'
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author: Patrick Bareiss, Splunk
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status: production
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type: Anomaly
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description: The following analytic detects when two-factor authentication (2FA) requirements are disabled in GitHub Organizations. The detection monitors GitHub Organizations audit logs for 2FA requirement changes by tracking actor details, organization information, and associated metadata. For a SOC, identifying disabled 2FA requirements is critical as it could indicate attempts to weaken account security controls. Two-factor authentication is a fundamental security control that helps prevent unauthorized access even if passwords are compromised. Disabling 2FA requirements could allow attackers to more easily compromise accounts through password-based attacks. The impact of disabled 2FA includes increased risk of account takeover, potential access to sensitive code and intellectual property, and compromise of the software supply chain. This activity could be part of a larger attack chain where an adversary first disables security controls before attempting broader account compromises.
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data_source:
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- GitHub Organizations Audit Logs
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search: |-
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`github_organizations` vendor_action=org.disable_two_factor_requirement
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| fillnull
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| stats count min(_time) as firstTime max(_time) as lastTime
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BY actor, actor_id, actor_ip,
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actor_is_bot, actor_location.country_code, business,
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business_id, org, org_id,
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user_agent, vendor_action
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| eval user=actor
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `github_organizations_disable_2fa_requirement_filter`
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how_to_implement: You must ingest GitHub Organizations logs using Splunk Add-on for Github using a Personal Access Token https://splunk.github.io/splunk-add-on-for-github-audit-log-monitoring/Install/ .
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known_false_positives: No false positives have been identified at this time.
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references:
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- https://splunk.github.io/splunk-add-on-for-github-audit-log-monitoring/Install/
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- https://www.googlecloudcommunity.com/gc/Community-Blog/Monitoring-for-Suspicious-GitHub-Activity-with-Google-Security/ba-p/763610
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drilldown_searches:
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- name: View the detection results for - "$user$"
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search: '%original_detection_search% | search user = "$user$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$user$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: $user$ disabled 2FA requirement in GitHub Organizations
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risk_objects:
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- field: user
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type: user
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score: 25
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threat_objects:
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- field: user_agent
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type: http_user_agent
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tags:
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analytic_story:
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- GitHub Malicious Activity
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asset_type: GitHub
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mitre_attack_id:
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- T1562.001
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- T1195
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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security_domain: network
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/github_disable_two_factor_requirement/github.json
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source: github
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sourcetype: github:cloud:audit
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