Possible PowerShell Obfuscation Via Character Join (via ps_script)

title: Possible PowerShell Obfuscation Via Character Join (via ps_script)
id: 536f8664-d74d-5e11-8703-77f982d604eb
status: stable
description: This rule detects specific methods frequently seen used inside of PowerShell scripts to obfscuate Alias creation
references:
    - https://attack.mitre.org/techniques/T1059/001/
    - https://attack.mitre.org/techniques/T1027/
    - Internal Research
author: Huntrule Team
date: 2026-07-15
tags:
    - attack.execution
    - attack.stealth
    - attack.t1027
    - attack.t1059.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - '-Alias'
            - ' -Value (-join('
    condition: selection
falsepositives:
    - Unknown
level: low