AWS EC2 Disable EBS Encryption

 Original Source: [Sigma source]
Title: AWS EC2 Disable EBS Encryption
Status: stable
Description:Identifies disabling of default Amazon Elastic Block Store (EBS) encryption in the current region. Disabling default encryption does not change the encryption status of your existing volumes.
References:
  -https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DisableEbsEncryptionByDefault.html
Author: Sittikorn S
Date: 2021-06-29
modified:2021-08-20
Tags:
  • -'attack.impact'
  • -'attack.t1486'
  • -'attack.t1565'
Logsource:
  • product: aws
  • service: cloudtrail
Detection:
  selection:
    eventSource: 'ec2.amazonaws.com'
    eventName: 'DisableEbsEncryptionByDefault'
  condition:selection
Falsepositives:
  -System Administrator Activities
  -DEV, UAT, SAT environment. You should apply this rule with PROD account only.
Level: medium