Detects when a single AWS resource is running multiple read-only, discovery API calls in a 10-second window. This behavior could indicate an actor attempting to discover the AWS infrastructure using compromised credentials or a compromised instance. Adversaries may use this information to identify potential targets for further exploitation or to gain a better understanding of the target's infrastructure.

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Identifies deletion of imported key material from an AWS KMS customer managed key via DeleteImportedKeyMaterial. Keys created with an external key material origin (BYOK) rely on key material that the customer imports. Deleting that material immediately makes the key unusable and renders all data encrypted under it inaccessible, with no recovery window. Unlike ScheduleKeyDeletion, which enforces a pending deletion period of 7 to 30 days, this action takes effect instantly, making it an attractive primitive for cloud ransomware and data-destruction attacks. Because this operation only applies to external-origin keys and is rare in normal operations, its use by an unexpected principal warrants prompt review.

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Identifies use of the S3 CopyObject API where the destination object is encrypted using an AWS KMS key from an external AWS account. This behavior may indicate ransomware-style impact activity where an adversary with access to a misconfigured S3 bucket encrypts objects using a KMS key they control, preventing the bucket owner from decrypting their own data. This technique is a critical early signal of destructive intent or cross-account misuse.

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