mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Eric McGinnis
68 lines
4.1 KiB
YAML
68 lines
4.1 KiB
YAML
name: GitHub Enterprise Repository Deleted
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id: f709e736-3e6c-492f-b865-bc7696cc24a7
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version: 8
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creation_date: '2025-01-15'
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modification_date: '2026-05-13'
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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 a user deletes a repository in GitHub Enterprise. The detection monitors GitHub Enterprise audit logs for repository deletion events, which could indicate unauthorized removal of critical source code and project resources. For a SOC, identifying repository deletions is crucial as it may signal account compromise, insider threats, or malicious attempts to destroy intellectual property and disrupt development operations. The impact could be severe, potentially resulting in permanent loss of source code, documentation, project history, and other critical assets if proper backups are not maintained. Repository deletion could halt development workflows, cause significant business disruption, and require substantial effort to restore from backups if available. Additionally, unauthorized repository removal could be part of a larger attack campaign aimed at destroying or compromising enterprise assets.
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data_source:
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- GitHub Enterprise Audit Logs
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search: |-
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`github_enterprise` action=repo.destroy
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| stats count min(_time) as firstTime max(_time) as lastTime
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BY actor, actor_id, actor_is_bot,
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actor_location.country_code, business, business_id,
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org, org_id, repo,
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repo_id, user_agent, visibility,
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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_enterprise_repository_deleted_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: No false positives have been identified at this time.
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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 ("$user$") | 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: 7d
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latest_offset: "0"
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intermediate_findings:
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entities:
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- field: user
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type: user
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score: 20
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message: $user$ deleted a repository in GitHub Enterprise
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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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analytic_story:
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- GitHub Malicious Activity
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- NPM Supply Chain Compromise
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asset_type: GitHub
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mitre_attack_id:
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- T1485
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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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category: 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/T1485/github_delete_repository/github.json
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source: http:github
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sourcetype: httpevent
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test_type: unit
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