AWS Snapshot Backup Exfiltration

Description

Detects the modification of an EC2 snapshot's permissions to enable access from another account

Query · sigma

selection_source:
  eventSource: ec2.amazonaws.com
  eventName: ModifySnapshotAttribute
condition: selection_source

Known false positives

  • Valid change to a snapshot's permissions
Raw source AWS Snapshot Backup Exfiltration · Sigma
Esc
Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: AWS Snapshot Backup Exfiltration
id: abae8fec-57bd-4f87-aff6-6e3db989843d
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

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.