AWS EFS Fileshare Mount Modified or Deleted

calendar Oct 12, 2023 · attack.impact attack.t1485  ·
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Detects when a EFS Fileshare Mount is modified or deleted. An adversary breaking any file system using the mount target that is being deleted, which might disrupt instances or applications using those mounts.

Sigma rule (View on GitHub)

 1title: AWS EFS Fileshare Mount Modified or Deleted
 2id: 6a7ba45c-63d8-473e-9736-2eaabff79964
 3status: test
 4description: Detects when a EFS Fileshare Mount is modified or deleted. An adversary breaking any file system using the mount target that is being deleted, which might disrupt instances or applications using those mounts.
 5references:
 6    - https://docs.aws.amazon.com/efs/latest/ug/API_DeleteMountTarget.html
 7author: Austin Songer @austinsonger
 8date: 2021/08/15
 9modified: 2022/10/09
10tags:
11    - attack.impact
12    - attack.t1485
13logsource:
14    product: aws
15    service: cloudtrail
16detection:
17    selection:
18        eventSource: elasticfilesystem.amazonaws.com
19        eventName: DeleteMountTarget
20    condition: selection
21falsepositives:
22    - Unknown
23level: medium

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