The rule 'GitHub Org Authentication Method Changed' is designed to detect modifications to the authentication settings of GitHub organizations. It focuses specifically on actions that alter the organization's authentication methods, such as enabling or disabling single sign-on (SSO) or related security configurations. By monitoring these changes, the rule aims to identify potential unauthorized alterations that could impact the security posture of the organization. The detection is triggered by logging changes in the GitHub audit logs where the action indicates a modification of authentication settings. The severity level is set to critical due to the potential implications of such changes on organizational security and access controls. Analysts are advised to verify if the activities were performed by legitimate administrators before taking any further actions. Additionally, the rule includes a reference link for additional information regarding GitHub authentication practices.