Sigma rule: Github SSH Certificate Configuration Changed

Rule

Title

Github SSH Certificate Configuration Changed

Status

test

Level

medium

Author

Romain Gaillard (@romain-gaillard)

Date

2024-07-29

File

rules/application/github/audit/github_ssh_certificate_config_changed.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when changes are made to the SSH certificate configuration of the organization.

Log source

product

github

service

audit

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

Detection

selection:
    action:
        - 'ssh_certificate_authority.create' # An SSH certificate authority for an organization or enterprise was created.
        - 'ssh_certificate_requirement.disable' # The requirement for members to use SSH certificates to access an organization resources was disabled.
condition: selection

False positives (as the rule lists them)

• Allowed administrative activities.

Tags

• attack.initial-access
• attack.persistence
• attack.privilege-escalation
• attack.stealth
• attack.t1078.004

MITRE ATT&CK ids this rule names

• T1078.004

References

• https://docs.github.com/en/enterprise-cloud@latest/organizations/managing-git-access-to-your-organizations-repositories/about-ssh-certificate-authorities
• https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/audit-log-events-for-your-enterprise#ssh_certificate_authority

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/application/github/audit/github_ssh_certificate_config_changed.yml