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

AppX Package Deployment Failed Due to Signing Requirements

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

AppX Package Deployment Failed Due to Signing Requirements

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: AppX Package Deployment Failed Due to Signing Requirements
id: 898d5fc9-fbc3-43de-93ad-38e97237c344
status: test
description: |
    Detects an appx package deployment / installation with the error code "0x80073cff" which indicates that the package didn't meet the signing requirements.
references:
    - https://www.sentinelone.com/labs/inside-malicious-windows-apps-for-malware-deployment/
    - https://learn.microsoft.com/en-us/windows/win32/appxpkg/troubleshooting
    - https://news.sophos.com/en-us/2021/11/11/bazarloader-call-me-back-attack-abuses-windows-10-apps-mechanism/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-11
modified: 2025-12-03
tags:
    - attack.defense-evasion
logsource:
    product: windows
    service: appxdeployment-server
detection:
    selection:
        EventID: 401
        ErrorCode: '0x80073cff' # Check ref section to learn more about this error code
    condition: selection
falsepositives:
    - Legitimate AppX packages not signed by MS used part of an enterprise.
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_appxdeployment_server_appx_package_deployment_failed_signing_requirements.yml