Elastic Security Detection Rules

Unusual Linux User Discovery Activity

Last updated 7 months ago on 2025-01-15
Created 5 years ago on 2020-09-03

About

Looks for commands related to system user or owner discovery from an unusual user context. This can be due to uncommon troubleshooting activity or due to a compromised account. A compromised account may be used to engage in system owner or user discovery in order to identify currently active or primary users of a system. This may be a precursor to additional discovery, credential dumping or privilege elevation activity.
Tags
Domain: EndpointOS: LinuxUse Case: Threat DetectionRule Type: MLRule Type: Machine LearningTactic: Discovery
Severity
low
Risk Score
21
MITRE ATT&CK™

Discovery (TA0007)(opens in a new tab or window)

↳ System Owner/User Discovery (T1033)(opens in a new tab or window)

False Positive Examples
Uncommon user command activity can be due to an engineer logging onto a server instance in order to perform manual troubleshooting or reconfiguration.
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Machine Learning
Integration Pack
Prebuilt Security Detection Rules
Related Integrations

auditd_manager(opens in a new tab or window)

endpoint(opens in a new tab or window)

Query

Install detection rules in Elastic Security

Detect Unusual Linux User Discovery Activity 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).