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https://github.com/splunk/security_content
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Eric
65 lines
3.9 KiB
YAML
65 lines
3.9 KiB
YAML
name: GitHub Enterprise Disable 2FA Requirement
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id: 5a773226-ebd7-480c-a819-fccacfeddcd9
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version: 2
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date: '2025-05-02'
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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 Enterprise.
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The detection monitors GitHub Enterprise audit logs for 2FA requirement changes by tracking actor details, organization information,
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and associated metadata. For a SOC, identifying disabled 2FA requirements is critical as it could indicate attempts to weaken
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account security controls. Two-factor authentication is a fundamental security control that helps prevent unauthorized access even if
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passwords are compromised. Disabling 2FA requirements could allow attackers to more easily compromise accounts through password-based attacks.
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The impact of disabled 2FA includes increased risk of account takeover, potential access to sensitive code and intellectual property, and
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compromise of the software supply chain. This activity could be part of a larger attack chain where an adversary first disables
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security controls before attempting broader account compromises.
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data_source:
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- GitHub Enterprise Audit Logs
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search: '`github_enterprise` action=org.disable_two_factor_requirement OR action=business.disable_two_factor_requirement
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| fillnull
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| stats count min(_time) as firstTime max(_time) as lastTime by actor, actor_id, actor_is_bot, actor_location.country_code, business, business_id, user_agent, action
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| eval user=actor
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `github_enterprise_disable_2fa_requirement_filter`'
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how_to_implement: You must ingest GitHub Enterprise logs using Audit log streaming as described in this documentation 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-streaming-to-splunk using a Splunk HTTP Event Collector.
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known_false_positives: unknown
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references:
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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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- 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-streaming-to-splunk
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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
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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: http:github
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sourcetype: httpevent
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