PowerShell Execution from WinGet Configuration Remoting Server

[rule]
description = """
Identifies PowerShell script execution where the hosting process is ConfigurationRemotingServer.exe (the WinGet
Configuration remoting worker). This may indicate the abuse of the WinGet Configuration COM API to run
attacker-controlled DSC through Microsoft-signed binaries.
"""
id = "f1a2b3c4-d5e6-4789-a012-3456789abcde"
license = "Elastic License v2"
name = "PowerShell Execution from WinGet Configuration Remoting Server"
os_list = ["windows"]
reference = ["https://github.com/DylanDavis1/DSCourier"]
version = "1.0.1"

query = '''
api where process.name : "ConfigurationRemotingServer.exe" and
  process.Ext.api.name == "AmsiScanBuffer" and
  process.Ext.api.parameters.app_name == "PowerShell" and 
  not process.Ext.api.parameters.buffer in ("$false", "$PSHome") and 
  not process.Ext.api.parameters.content_name : 
               ("?:\\Users\\*\\AppData\\Local\\Microsoft\\WinGet\\Configuration\\Modules\\PSDesiredStateConfiguration\\*.psm1", 
                "?:\\Program Files\\WindowsApps\\Microsoft.DesktopAppInstaller_*.psm1") and 
  not (process.Ext.api.parameters.size >= 20000 and process.Ext.api.parameters.buffer : "################*Microsoft Corporation*##############*") and  
  not (process.Ext.api.parameters.size == 1782 and process.Ext.api.parameters.buffer : "*Localized MSFT_ScriptResource.strings.psd1*")
'''

min_endpoint_version = "8.16.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
[[threat.technique.subtechnique]]
id = "T1059.001"
name = "PowerShell"
reference = "https://attack.mitre.org/techniques/T1059/001/"



[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"


[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

[internal]
min_endpoint_version = "8.16.0"