AWS EFS File System or Mount Deleted
Elastic Stack Serverless Security
Detects when a EFS File System or Mount is deleted. An adversary could break any file system using the mount target that is being deleted, which might disrupt instances or applications using those mounts. The mount must be deleted prior to deleting the File System, or the adversary will be unable to delete the File System.
Rule type: query
Rule indices:
- filebeat-*
- logs-aws*
Severity: medium
Risk score: 47
Runs every: 10m
Searches indices from: now-60m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)
Maximum alerts per execution: 100
References:
- https://docs.aws.amazon.com/efs/latest/ug/API_DeleteFileSystem.html
- https://docs.aws.amazon.com/efs/latest/ug/API_DeleteMountTarget.html
Tags:
- Elastic
- Cloud
- AWS
- Continuous Monitoring
- SecOps
- Data Protection
Version: 1
Rule authors:
- Austin Songer
Rule license: Elastic License v2
The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
event.dataset:aws.cloudtrail and event.provider:elasticfilesystem.amazonaws.com and
event.action:(DeleteMountTarget or DeleteFileSystem) and event.outcome:success
Framework: MITRE ATT&CKTM
Tactic:
- Name: Impact
- ID: TA0040
- Reference URL: https://attack.mitre.org/tactics/TA0040/
Technique:
- Name: Data Destruction
- ID: T1485
- Reference URL: https://attack.mitre.org/techniques/T1485/