Execution of Powershell Script in Public Folder

Description

This rule detects execution of PowerShell scripts located in the "C:\Users\Public" folder

Query · sigma

selection:
  Image|endswith:
  - \powershell.exe
  - \pwsh.exe
  CommandLine|contains:
  - -f C:\Users\Public
  - -f "C:\Users\Public
  - -f %Public%
  - -fi C:\Users\Public
  - -fi "C:\Users\Public
  - -fi %Public%
  - -fil C:\Users\Public
  - -fil "C:\Users\Public
  - -fil %Public%
  - -file C:\Users\Public
  - -file "C:\Users\Public
  - -file %Public%
condition: selection

Known false positives

  • Unlikely
Raw source Execution of Powershell Script in Public Folder · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Execution of Powershell Script in Public Folder
id: fb9d3ff7-7348-46ab-af8c-b55f5fbf39b4
status: test
description: This rule detects execution of PowerShell scripts located in the "C:\Users\Public" folder
references:
    - https://www.mandiant.com/resources/evolution-of-fin7
author: Max Altgelt (Nextron Systems)
date: 2022-04-06
modified: 2022-07-14
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\powershell.exe'
            - '\pwsh.exe'
        CommandLine|contains:
            - '-f C:\Users\Public'
            - '-f "C:\Users\Public'
            - '-f %Public%'
            - '-fi C:\Users\Public'
            - '-fi "C:\Users\Public'
            - '-fi %Public%'
            - '-fil C:\Users\Public'
            - '-fil "C:\Users\Public'
            - '-fil %Public%'
            - '-file C:\Users\Public'
            - '-file "C:\Users\Public'
            - '-file %Public%'
    condition: selection
falsepositives:
    - Unlikely
level: high

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