Potential Credential Access via DuplicateHandle in LSASS

Last updated 4 months ago on 2025-03-20

Created 4 years ago on 2021-09-27

About

Identifies suspicious access to an LSASS handle via DuplicateHandle from an unknown call trace module. This may indicate an attempt to bypass the NtOpenProcess API to evade detection and dump LSASS memory for credential access.

Tags

Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Credential AccessData Source: SysmonLanguage: eql

Severity

medium

Risk Score

MITRE ATT&CK™

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

↳ OS Credential Dumping (T1003)(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: winlogbeat-*logs-windows.sysmon_operational-*
Related Integrations: windows(opens in a new tab or window)
Query

process where host.os.type == "windows" and event.code == "10" and

 /* LSASS requesting DuplicateHandle access right to another process */
 process.name : "lsass.exe" and winlog.event_data.GrantedAccess == "0x40" and

 /* call is coming from an unknown executable region */
 winlog.event_data.CallTrace : "*UNKNOWN*"

Install detection rules in Elastic Security

Detect Potential Credential Access via DuplicateHandle in LSASS 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).