Elastic Security Detection Rules

Potential Linux Local Account Brute Force Detected

Last updated a month ago on 2024-10-17
Created a year ago on 2023-07-26

About

Identifies multiple consecutive login attempts executed by one process targeting a local linux user account within a short time interval. Adversaries might brute force login attempts across different users with a default wordlist or a set of customly crafted passwords in an attempt to gain access to these accounts.
Tags
Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: Credential AccessData Source: Elastic Defend
Severity
medium
Risk Score
47
MITRE ATT&CK™

Credential Access (TA0006)(opens in a new tab or window)

↳ Brute Force (T1110)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.*
Related Integrations

endpoint(opens in a new tab or window)

Query
sequence by host.id, process.parent.executable, user.id with maxspan=1s
  [process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.name == "su" and 
   not process.parent.name in (
     "bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh", "fish", "clickhouse-server", "ma", "gitlab-runner",
     "updatedb.findutils", "cron", "perl", "sudo", "java", "cloud-app-identify", "ambari-sudo.sh"
   )
  ] with runs=10

Install detection rules in Elastic Security

Detect Potential Linux Local Account Brute Force Detected 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).