Sigma rule: New Application in AppCompat

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-980937fea53f, updated 2023-08-17T00:00:00.000Z.

Rule

Title
New Application in AppCompat
Status
test
Level
informational
Author
Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
Date
2020-05-02
Modified
2023-08-17
File
rules/windows/registry/registry_set/registry_set_new_application_appcompat.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

A General detection for a new application in AppCompat. This indicates an application executing for the first time on an endpoint.

Log source

product
windows
category
registry_set

Detection

selection:
    TargetObject|contains: '\AppCompatFlags\Compatibility Assistant\Store\'
condition: selection

False positives (as the rule lists them)

  • This rule is to explore new applications on an endpoint. False positives depends on the organization.
  • Newly setup system.
  • Legitimate installation of new application.

Tags

  • attack.execution
  • attack.t1204.002

MITRE ATT&CK ids this rule names

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/registry/registry_set/registry_set_new_application_appcompat.yml

Sources and licences

  • SigmaHQ

    "New Application in AppCompat" by Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_new_application_appcompat.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: New Application in AppCompat",
entity page, dataset version ref-980937fea53f, updated 2023-08-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/60936b49-fca0-4f32-993d-7415edcf9a5d (accessed 2026-11-03).
Underlying source: SigmaHQ rule 60936b49-fca0-4f32-993d-7415edcf9a5d, 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.