Suspicious Windows PowerShell User Agent (via proxy)

title: Suspicious Windows PowerShell User Agent (via proxy)
id: da4097a0-4120-59b2-a890-fefad3085950
status: stable
description: This rule detects Windows PowerShell Web Access
references:
    - https://attack.mitre.org/techniques/T1071/001/
    - https://msdn.microsoft.com/powershell/reference/5.1/microsoft.powershell.utility/Invoke-WebRequest
author: Huntrule Team
date: 2026-02-08
tags:
    - attack.command-and-control
    - attack.t1071.001
logsource:
    category: proxy
detection:
    selection:
        c-useragent|contains: ' WindowsPowerShell/'
    condition: selection
falsepositives:
    - Unknown
level: medium