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.

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Indexed Rules

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Backends

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CLI Versions

Newest: 2.0.2

Translation Workspace

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Active Rule

Unsigned AppX Installation Attempt Using Add-AppxPackage - PsScript

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

Unsigned AppX Installation Attempt Using Add-AppxPackage - PsScript

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: Unsigned AppX Installation Attempt Using Add-AppxPackage - PsScript
id: 975b2262-9a49-439d-92a6-0709cccdf0b2
related:
    - id: 37651c2a-42cd-4a69-ae0d-22a4349aa04a
      type: similar
    - id: 9a025188-6f2d-42f8-bb2f-d3a83d24a5af
      type: similar
status: test
description: Detects usage of the "Add-AppxPackage" or it's alias "Add-AppPackage" to install unsigned AppX packages
references:
    - https://learn.microsoft.com/en-us/windows/msix/package/unsigned-package
    - https://twitter.com/WindowsDocs/status/1620078135080325122
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-31
tags:
    - attack.persistence
    - attack.defense-evasion
logsource:
    product: windows
    category: ps_script
    definition: Script Block Logging must be enable
detection:
    selection_cmdlet:
        ScriptBlockText|contains:
            - 'Add-AppPackage '
            - 'Add-AppxPackage '
    selection_flag:
        ScriptBlockText|contains: ' -AllowUnsigned'
    condition: all of selection_*
falsepositives:
    - Installation of unsigned packages for testing purposes
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_script/posh_ps_install_unsigned_appx_packages.yml