This detection rule monitors for the deletion of backup catalogs, a critical event that may indicate malicious activity or unauthorized changes to backup systems. Specifically, it focuses on Event ID 524 from the Microsoft Windows Backup service, which is logged when a backup catalog is deleted. The alert is designed to inform administrators of potential security risks related to data loss or the circumvention of backup processes, which could be indicative of an attack utilizing defense evasion techniques. The rule operates under the assumption that backup deletions should be closely monitored to prevent the loss of valuable recovery options and to detect potentially malicious actions. In the context of cybersecurity, understanding these deletion events is vital, as they can signal efforts to compromise data integrity and can be a precursor to more serious security incidents.