Identifies deletion of an AWS Backup vault or removal of its Vault Lock configuration via DeleteBackupVault or DeleteBackupVaultLockConfiguration. A backup vault stores recovery points, and Vault Lock enforces WORM (write-once, read-many) immutability that prevents recovery points from being deleted before their retention expires. Removing the lock defeats the primary control designed to stop ransomware from destroying backups, and deleting the vault removes the backup container entirely. Both actions are strong anti-recovery signals and are rare in normal operations.

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