AWS EFS File System or Mount Deleted
editAWS EFS File System or Mount Deleted
editDetects when an 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: 100 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Potential false positives
editFile 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 guide
editRule query
editevent.dataset:aws.cloudtrail and event.provider:elasticfilesystem.amazonaws.com and event.action:(DeleteMountTarget or DeleteFileSystem) and event.outcome:success
Threat mapping
editFramework: 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 history
edit- Version 100 (8.5.0 release)
-
- Formatting only
- Version 5 (8.4.0 release)
-
-
Updated query, changed from:
event.dataset:aws.cloudtrail and event.provider:elasticfilesystem.amazonaws.com and event.action:(DeleteMountTarget or DeleteFileSystem) and event.outcome:success
-
- Version 3 (8.2.0 release)
-
- Formatting only
- Version 2 (8.1.0 release)
-
- Formatting only