Remote LSASS Process Access Through Windows Remote Management — Sigma Rule

Rule metadata and linked tags

Author: Patryk Prauze - ING Tech. Source status: stable; severity: high. Source dates: 2019-05-20 / 2023-11-29.

{
  "category": "process_access",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b4a9bbf215e5f903f668819aaa546b1a9ee8257332eeae94fad63d9d4d454c42

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Remote LSASS Process Access Through Windows Remote Management
id: aa35a627-33fb-4d04-a165-d33b4afca3e8
status: stable
description: Detects remote access to the LSASS process via WinRM. This could be a sign of credential dumping from tools like mimikatz.
references:
    - https://pentestlab.blog/2018/05/15/lateral-movement-winrm/
author: Patryk Prauze - ING Tech
date: 2019-05-20
modified: 2023-11-29
tags:
    - attack.credential-access
    - attack.execution
    - attack.t1003.001
    - attack.t1059.001
    - attack.lateral-movement
    - attack.t1021.006
    - attack.s0002
logsource:
    category: process_access
    product: windows
detection:
    selection:
        TargetImage|endswith: '\lsass.exe'
        SourceImage|endswith: ':\Windows\system32\wsmprovhost.exe'
    filter_main_access:
        GrantedAccess: '0x80000000'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://pentestlab.blog/2018/05/15/lateral-movement-winrm/