The GCP KMS Key Version Disabled or Destroyed detection rule monitors the operations of Google Cloud Key Management Service (KMS) to identify any instances where a key version has been marked as disabled or is scheduled for destruction. Such actions can be indicative of an attempt to manage access to encrypted data, effectively enabling attackers to hinder data recovery efforts during a ransomware attack. The detection utilizes GCP Audit Logs to assess the state of KMS key versions and helps identify potential abuse of permissions associated with cryptographic key operations. This rule is classified as experimental and operates based on the severity level 'Info'. It aims to guide incident response to potential ransomware incidents by correlating the disabling or destruction of keys with other suspicious activity within the cloud environment.