AWS Snapshot Backup Exfiltration

 Original Source: [Sigma source]
Title: AWS Snapshot Backup Exfiltration
Status: test
Description:Detects the modification of an EC2 snapshot's permissions to enable access from another account
References:
  -https://www.justice.gov/file/1080281/download
Author: Darin Smith
Date: 2021-05-17
modified:2021-08-19
Tags:
  • -'attack.exfiltration'
  • -'attack.t1537'
Logsource:
  • product: aws
  • service: cloudtrail
Detection:
  selection_source:
    eventSource: 'ec2.amazonaws.com'
    eventName: 'ModifySnapshotAttribute'
  condition:selection_source
Falsepositives:
  -Valid change to a snapshot's permissions
Level: medium