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
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pySigma Versions
10
Newest: 1.3.3
Translation Workspace
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Active Rule
COLDSTEEL RAT Cleanup Command Execution
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
COLDSTEEL RAT Cleanup Command Execution
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: COLDSTEEL RAT Cleanup Command Execution
id: 88516f06-ebe0-47ad-858e-ae9fd060ddea
status: test
description: Detects the creation of a "rundll32" process from the ColdSteel persistence service to initiate the cleanup command by calling one of its own exports. This functionality is not present in "MileStone2017" and some "MileStone2016" samples
references:
- https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/cold-steel/NCSC-MAR-Cold-Steel.pdf
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-04-30
tags:
- attack.persistence
- attack.defense-evasion
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\svchost.exe'
ParentCommandLine|contains:
- ' -k msupdate'
- ' -k msupdate2'
- ' -k alg'
Image|endswith: '\rundll32.exe'
CommandLine|contains:
- 'UpdateDriverForPlugAndPlayDevicesW'
- 'ServiceMain'
- 'DiUninstallDevice'
condition: selection
falsepositives:
- Unlikely
level: critical
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2023/Malware/COLDSTEEL/proc_creation_win_malware_coldsteel_cleanup.yml