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 live sigma-cli backend, then reveal pipelines only when you actually need them.

Browse Rules Explore Ecosystem

Indexed Rules

3,707

Ready to search

Backends

Live from sigconverter.io

CLI Versions

Newest: 2.0.2

Translation Workspace

Shape the rule before it leaves Phoenix

Tune Translation

Active Rule

Suspicious PowerShell Download and Execute Pattern

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

Suspicious PowerShell Download and Execute Pattern

Using Splunk · Default · sigma-cli 2.0.2

Translation controls

Adjust the rule on the left, then regenerate when you want a fresh backend-native query.

BackendSplunkFormatDefaultVersion2.0.2

title: Suspicious PowerShell Download and Execute Pattern
id: e6c54d94-498c-4562-a37c-b469d8e9a275
related:
    - id: 3b6ab547-8ec2-4991-b9d2-2b06702a48d7
      type: derived
status: test
description: Detects suspicious PowerShell download patterns that are often used in malicious scripts, stagers or downloaders (make sure that your backend applies the strings case-insensitive)
references:
    - https://gist.github.com/jivoi/c354eaaf3019352ce32522f916c03d70
    - https://www.trendmicro.com/en_us/research/22/j/lv-ransomware-exploits-proxyshell-in-attack.html
author: Florian Roth (Nextron Systems)
date: 2022-02-28
modified: 2022-03-01
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains: # make sure that your backend applies the strings case-insensitive
            - 'IEX ((New-Object Net.WebClient).DownloadString'
            - 'IEX (New-Object Net.WebClient).DownloadString'
            - 'IEX((New-Object Net.WebClient).DownloadString'
            - 'IEX(New-Object Net.WebClient).DownloadString'
            - ' -command (New-Object System.Net.WebClient).DownloadFile('
            - ' -c (New-Object System.Net.WebClient).DownloadFile('
    condition: selection
falsepositives:
    - Software installers that pull packages from remote systems and execute them
level: high

CLI command

Copy the exact command to reproduce this translation locally.

sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_powershell_susp_download_patterns.yml