Elastic Security Detection Rules

AWS EFS File System or Mount Deleted

Last updated 7 months ago on 2025-01-15
Created 4 years ago on 2021-08-27

About

Detects 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.
Tags
Domain: CloudData Source: AWSData Source: Amazon Web ServicesTactic: ImpactLanguage: kuery
Severity
medium
Risk Score
47
MITRE ATT&CK™

Impact (TA0040)(opens in a new tab or window)

↳ Data Destruction (T1485)(opens in a new tab or window)

False Positive Examples
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.
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
filebeat-*logs-aws.cloudtrail-*
Related Integrations

aws(opens in a new tab or window)

Query
event.dataset:aws.cloudtrail and event.provider:elasticfilesystem.amazonaws.com and
event.action:(DeleteMountTarget or DeleteFileSystem) and event.outcome:success

Install detection rules in Elastic Security

Detect AWS EFS File System or Mount Deleted in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).