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.
Indexed Rules
3,707
Ready to search
Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
ScreenSaver Registry Key Set
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
ScreenSaver Registry Key Set
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: ScreenSaver Registry Key Set
id: 40b6e656-4e11-4c0c-8772-c1cc6dae34ce
status: test
description: Detects registry key established after masqueraded .scr file execution using Rundll32 through desk.cpl
references:
- https://twitter.com/VakninHai/status/1517027824984547329
- https://twitter.com/pabraeken/status/998627081360695297
- https://jstnk9.github.io/jstnk9/research/InstallScreenSaver-SCR-files
author: Jose Luis Sanchez Martinez (@Joseliyo_Jstnk)
date: 2022-05-04
modified: 2023-08-17
tags:
- attack.defense-evasion
- attack.t1218.011
logsource:
product: windows
category: registry_set
detection:
selection:
Image|endswith: '\rundll32.exe'
registry:
TargetObject|contains: '\Control Panel\Desktop\SCRNSAVE.EXE'
Details|endswith: '.scr'
filter:
Details|contains:
- 'C:\Windows\System32\'
- 'C:\Windows\SysWOW64\'
condition: selection and registry and not filter
falsepositives:
- Legitimate use of screen saver
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/registry/registry_set/registry_set_scr_file_executed_by_rundll32.yml