mirror of
https://github.com/splunk/security_content
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Bhavin Patel
74 lines
3.2 KiB
YAML
74 lines
3.2 KiB
YAML
name: GitHub Actions Disable Security Workflow
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id: 0459f1a5-c0ac-4987-82d6-65081209f854
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version: 2
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date: '2024-05-17'
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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 the disabling of a security workflow in
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GitHub Actions. It leverages GitHub logs to identify when a workflow, excluding
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those named *security-testing*, is disabled following a push or pull request event.
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This activity is significant as it may indicate an attempt by an attacker to conceal
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malicious code by disabling security checks. If confirmed malicious, this could
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allow the attacker to introduce and persist undetected malicious code within the
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repository, potentially compromising the integrity and security of the codebase.
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data_source:
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- GitHub
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search: '`github` workflow_run.event=push OR workflow_run.event=pull_request | stats
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values(workflow_run.name) as workflow_run.name by workflow_run.head_commit.id workflow_run.event
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workflow_run.head_branch workflow_run.head_commit.author.email workflow_run.head_commit.author.name
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workflow_run.head_commit.message workflow_run.head_commit.timestamp workflow_run.head_repository.full_name
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workflow_run.head_repository.owner.id workflow_run.head_repository.owner.login workflow_run.head_repository.owner.type
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| rename workflow_run.head_commit.author.name as user, workflow_run.head_commit.author.email
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as user_email, workflow_run.head_repository.full_name as repository, workflow_run.head_branch
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as branch | search NOT workflow_run.name=*security-testing* | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `github_actions_disable_security_workflow_filter`'
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how_to_implement: You must index GitHub logs. You can follow the url in reference
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to onboard GitHub logs. Sometimes GitHub logs are truncated, make sure to disable
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it in props.conf. Replace *security-testing* with the name of your security testing
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workflow in GitHub Actions.
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known_false_positives: unknown
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references:
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- https://www.splunk.com/en_us/blog/tips-and-tricks/getting-github-data-with-webhooks.html
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tags:
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analytic_story:
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- Dev Sec Ops
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asset_type: GitHub
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confidence: 90
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impact: 30
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message: Security Workflow is disabled in branch $branch$ for repository $repository$
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mitre_attack_id:
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- T1195.002
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- T1195
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observable:
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- name: repository
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type: Other
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role:
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- Victim
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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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required_fields:
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- workflow_run.event
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- workflow_run.name
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- workflow_run.head_commit.id
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- workflow_run.event workflow_run.head_branch
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- workflow_run.head_commit.author.email
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- workflow_run.head_commit.author.name
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- workflow_run.head_commit.message
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- workflow_run.head_commit.timestamp
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- workflow_run.head_repository.full_name
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- workflow_run.head_repository.owner.id
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- workflow_run.head_repository.owner.login
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- workflow_run.head_repository.owner.type
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risk_score: 27
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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:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1195.002/github_actions_disable_security_workflow/github_actions_disable_security_workflow.log
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source: github
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sourcetype: aws:firehose:json
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