This detection rule targets unauthorized or unauthenticated access attempts to the Kubernetes API. It examines audit logs for responses with HTTP status codes 401 (Unauthorized) and 403 (Forbidden). These responses indicate that either the client lacks the necessary permissions to access the API or is using an expired authentication token, which could suggest potential malicious activity by an attacker trying to exploit stolen credentials. The rule is designed to catch these instances early, allowing teams to respond quickly to unauthorized access attempts. It is important to monitor these events as they can highlight misconfigurations in Role-Based Access Control (RBAC) policies or genuine attempts to escalate privileges.