AWS EFS File System or Mount Deletededit
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: 10 minutes
Searches indices from: now-60m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- AWS
- Continuous Monitoring
- SecOps
- Data Protection
Version: 2 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.1.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Potential false positivesedit
File System or Mount being deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. File System Mount deletion by unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Investigation guideedit
## Config The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
Rule queryedit
event.dataset:aws.cloudtrail and event.provider:elasticfilesystem.amazonaws.com and event.action:(DeleteMountTarget or DeleteFileSystem) and event.outcome:success
Threat mappingedit
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/
Rule version historyedit
- Version 2 (8.1.0 release)
-
- Formatting only