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
Windows AppX Deployment Unsigned Package Installation
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Windows AppX Deployment Unsigned Package Installation
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: Windows AppX Deployment Unsigned Package Installation
id: 9a025188-6f2d-42f8-bb2f-d3a83d24a5af
related:
- id: 37651c2a-42cd-4a69-ae0d-22a4349aa04a
type: similar
- id: 975b2262-9a49-439d-92a6-0709cccdf0b2
type: similar
status: experimental
description: Detects attempts to install unsigned MSIX/AppX packages using the -AllowUnsigned parameter via AppXDeployment-Server events
references:
- https://docs.microsoft.com/en-us/powershell/module/appx/add-appxpackage
- https://www.splunk.com/en_us/blog/security/msix-weaponization-threat-detection-splunk.html
author: Michael Haag, Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-11-03
tags:
- attack.defense-evasion
- attack.execution
- attack.t1204.002
- attack.t1553.005
logsource:
product: windows
service: appxdeployment-server
detection:
selection:
EventID: 603
Flags: '8388608'
condition: selection
falsepositives:
- Legitimate installation of unsigned packages for legitimate purposes such as development or testing
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/builtin/appxdeployment_server/win_appxpackaging_server_unsigned_package_installation.yml