Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a local pySigma backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,731
Ready to search
Backends
17
Loaded from pysigma-node
pySigma Versions
10
Newest: 1.3.3
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
PowerShell Downgrade Attack - PowerShell
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
PowerShell Downgrade Attack - PowerShell
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: PowerShell Downgrade Attack - PowerShell
id: 6331d09b-4785-4c13-980f-f96661356249
status: test
description: Detects PowerShell downgrade attack by comparing the host versions with the actually used engine version 2.0
references:
- http://www.leeholmes.com/blog/2017/03/17/detecting-and-preventing-powershell-downgrade-attacks/
author: Florian Roth (Nextron Systems), Lee Holmes (idea), Harish Segar (improvements)
date: 2017-03-22
modified: 2023-10-27
tags:
- attack.defense-evasion
- attack.execution
- attack.t1059.001
logsource:
product: windows
category: ps_classic_start
detection:
selection:
Data|contains: 'EngineVersion=2.'
filter_main:
Data|contains: 'HostVersion=2.'
condition: selection and not filter_main
falsepositives:
- Unknown
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/powershell/powershell_classic/posh_pc_downgrade_attack.yml