Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
46 lines
2.3 KiB
YAML
46 lines
2.3 KiB
YAML
title: Github Self Hosted Runner Changes Detected
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id: f8ed0e8f-7438-4b79-85eb-f358ef2fbebd
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status: test
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description: |
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A self-hosted runner is a system that you deploy and manage to execute jobs from GitHub Actions on GitHub.com.
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This rule detects changes to self-hosted runners configurations in the environment. The self-hosted runner configuration changes once detected,
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it should be validated from GitHub UI because the log entry may not provide full context.
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author: Muhammad Faisal (@faisalusuf)
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date: 2023-01-27
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references:
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- https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners#about-self-hosted-runners
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- https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-security-settings-for-your-organization/reviewing-the-audit-log-for-your-organization#search-based-on-operation
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tags:
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- attack.impact
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- attack.discovery
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- attack.collection
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- attack.defense-evasion
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- attack.persistence
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- attack.privilege-escalation
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- attack.initial-access
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- attack.t1526
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- attack.t1213.003
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- attack.t1078.004
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logsource:
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product: github
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service: audit
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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'
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detection:
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selection:
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action:
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- 'org.remove_self_hosted_runner'
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- 'org.runner_group_created'
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- 'org.runner_group_removed'
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- 'org.runner_group_runner_removed'
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- 'org.runner_group_runners_added'
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- 'org.runner_group_runners_updated'
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- 'org.runner_group_updated'
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- 'repo.register_self_hosted_runner'
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- 'repo.remove_self_hosted_runner'
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condition: selection
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falsepositives:
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- Allowed self-hosted runners changes in the environment.
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- A self-hosted runner is automatically removed from GitHub if it has not connected to GitHub Actions for more than 14 days.
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- An ephemeral self-hosted runner is automatically removed from GitHub if it has not connected to GitHub Actions for more than 1 day.
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level: low
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