AWS EFS Fileshare Modified or Deleted

Description

Detects when a EFS Fileshare is modified or deleted. You can't delete a file system that is in use. If the file system has any mount targets, the adversary must first delete them, so deletion of a mount will occur before deletion of a fileshare.

Query · sigma

selection:
  eventSource: elasticfilesystem.amazonaws.com
  eventName: DeleteFileSystem
condition: selection

Known false positives

  • Unknown
Raw source AWS EFS Fileshare Modified or Deleted · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: AWS EFS Fileshare Modified or Deleted
id: 25cb1ba1-8a19-4a23-a198-d252664c8cef
status: test
description: |
  Detects when a EFS Fileshare is modified or deleted.
  You can't delete a file system that is in use.
  If the file system has any mount targets, the adversary must first delete them, so deletion of a mount will occur before deletion of a fileshare.
references:
    - https://docs.aws.amazon.com/efs/latest/ug/API_DeleteFileSystem.html
author: Austin Songer @austinsonger
date: 2021-08-15
modified: 2022-10-09
tags:
    - attack.impact
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: elasticfilesystem.amazonaws.com
        eventName: DeleteFileSystem
    condition: selection
falsepositives:
    - Unknown
level: medium

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