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AWS KMS Customer Managed Key Disabled or Scheduled for Deletionedit

Identifies attempts to disable or schedule the deletion of an AWS KMS Customer Managed Key (CMK). Deleting an AWS KMS key is destructive and potentially dangerous. It deletes the key material and all metadata associated with the KMS key and is irreversible. After a KMS key is deleted, the data that was encrypted under that KMS key can no longer be decrypted, which means that data becomes unrecoverable.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-aws*

Severity: medium

Risk score: 47

Runs every: 10 minutes

Searches indices from: now-60m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • AWS
  • Continuous Monitoring
  • SecOps
  • Log Auditing
  • Impact

Version: 1

Added (Elastic Stack release): 8.6.0

Rule authors: Xavier Pich

Rule license: Elastic License v2

Potential false positivesedit

A KMS customer managed key may be disabled or scheduled for deletion by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Key deletions by unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guideedit












Rule queryedit








event.dataset:aws.cloudtrail and event.provider:kms.amazonaws.com and
event.action:("DisableKey" or "ScheduleKeyDeletion") and
event.outcome:success











Threat mappingedit




Framework: MITRE ATT&CKTM














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