AWS KMS Customer Managed Key Disabled or Scheduled for Deletion
editAWS KMS Customer Managed Key Disabled or Scheduled for Deletion
editIdentifies 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 positives
editA 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 guide
editRule query
editevent.dataset:aws.cloudtrail and event.provider:kms.amazonaws.com and
event.action:("DisableKey" or "ScheduleKeyDeletion") and
event.outcome:success
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Impact
- ID: TA0040
- Reference URL: https://attack.mitre.org/tactics/TA0040/
-
Technique:
- Name: Data Destruction
- ID: T1485
- Reference URL: https://attack.mitre.org/techniques/T1485/