Sigma rule: Potential Malicious AppX Package Installation Attempts

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-3e7eaa50a079, updated 2023-01-12T00:00:00.000Z.

Rule

Title
Potential Malicious AppX Package Installation Attempts
Status
test
Level
medium
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-01-11
Modified
2023-01-12
File
rules/windows/builtin/appxdeployment_server/win_appxdeployment_server_mal_appx_names.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects potential installation or installation attempts of known malicious appx packages

Log source

product
windows
service
appxdeployment-server

Detection

selection:
    EventID:
        - 400
        - 401
    # Add more malicious package names
    # TODO: Investigate the packages here https://github.com/sophoslabs/IoCs/blob/master/Troj-BazarBackdoor.csv based on this report https://news.sophos.com/en-us/2021/11/11/bazarloader-call-me-back-attack-abuses-windows-10-apps-mechanism/
    PackageFullName|contains: '3669e262-ec02-4e9d-bcb4-3d008b4afac9'
condition: selection

False positives (as the rule lists them)

  • Rare occasions where a malicious package uses the exact same name and version as a legitimate application.

Tags

  • attack.stealth

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/appxdeployment_server/win_appxdeployment_server_mal_appx_names.yml

Sources and licences

  • SigmaHQ

    "Potential Malicious AppX Package Installation Attempts" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/appxdeployment_server/win_appxdeployment_server_mal_appx_names.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential Malicious AppX Package Installation Attempts",
entity page, dataset version ref-3e7eaa50a079, updated 2023-01-12T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/09d3b48b-be17-47f5-bf4e-94e7e75d09ce (accessed 2026-11-03).
Underlying source: SigmaHQ rule 09d3b48b-be17-47f5-bf4e-94e7e75d09ce, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.