Renamed PsExec Service Execution

Description

Detects suspicious launch of a renamed version of the PSEXESVC service with, which is not often used by legitimate administrators

Query · sigma

selection:
  OriginalFileName: psexesvc.exe
filter:
  Image: C:\Windows\PSEXESVC.exe
condition: selection and not filter

Known false positives

  • Legitimate administrative tasks
Raw source Renamed PsExec Service Execution · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Renamed PsExec Service Execution
id: 51ae86a2-e2e1-4097-ad85-c46cb6851de4
status: test
description: Detects suspicious launch of a renamed version of the PSEXESVC service with, which is not often used by legitimate administrators
references:
    - https://learn.microsoft.com/en-us/sysinternals/downloads/psexec
    - https://www.youtube.com/watch?v=ro2QuZTIMBM
author: Florian Roth (Nextron Systems)
date: 2022-07-21
tags:
    - attack.execution
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        OriginalFileName: 'psexesvc.exe'
    filter:
        Image: 'C:\Windows\PSEXESVC.exe'
    condition: selection and not filter
falsepositives:
    - Legitimate administrative tasks
level: high

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