Suspicious PowerShell Remote Session Creation (via ps_script)

title: Suspicious PowerShell Remote Session Creation (via ps_script)
id: 5238d653-b1b8-50ec-8c6a-928e79a8d975
status: stable
description: This rule detects threat actors may misuse PowerShell commands and scripts for execution. PowerShell is a powerful interactive command-line interface and scripting environment included in the Windows operating system
references:
    - https://attack.mitre.org/techniques/T1059/001/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1059.001/T1059.001.md#atomic-test-10---powershell-invoke-downloadcradle
    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/new-pssession?view=powershell-7.4
author: Huntrule Team
date: 2026-06-26
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - 'New-PSSession'
            - '-ComputerName '
    condition: selection
falsepositives:
    - Unknown
level: medium