Elastic Security Detection Rules

Authentication via Unusual PAM Grantor

Last updated 7 months ago on 2025-01-15
Created a year ago on 2024-03-06

About

This rule detects successful authentications via PAM grantors that are not commonly used. This could indicate an attacker is attempting to escalate privileges or maintain persistence on the system by modifying the default PAM configuration.
Tags
Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: Credential AccessTactic: PersistenceData Source: Auditd ManagerLanguage: kuery
Severity
medium
Risk Score
47
MITRE ATT&CK™

Persistence (TA0003)(opens in a new tab or window)

↳ Create or Modify System Process (T1543)(opens in a new tab or window)

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

↳ Modify Authentication Process (T1556)(opens in a new tab or window)

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

Definition

Rule Type
New Terms Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
auditbeat-*logs-auditd_manager.auditd-*
Related Integrations

auditd_manager(opens in a new tab or window)

Query
event.category:authentication and host.os.type:linux and event.action:authenticated and event.outcome:success and
auditd.data.grantors:(* and not (pam_rootok or *pam_cap* or *pam_permit*))

Install detection rules in Elastic Security

Detect Authentication via Unusual PAM Grantor 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).