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AWS KMS Customer Managed Key Disabled or Scheduled for Deletion

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AWS KMS Customer Managed Key Disabled or Scheduled for Deletion

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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.cloudtrail-*

Severity: medium

Risk score: 47

Runs every: 10m

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

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Cloud
  • Data Source: AWS
  • Data Source: Amazon Web Services
  • Data Source: AWS KMS
  • Use Case: Log Auditing
  • Tactic: Impact

Version: 106

Rule authors:

  • Xavier Pich

Rule license: Elastic License v2

Investigation guide

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Setup

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The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

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

Framework: MITRE ATT&CKTM

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