MediumSigmaHQ Nasreddine Bencherchali (Nextron Systems)

AppX Package Deployment Failed Due to Signing Requirements

Detects an appx package deployment / installation with the error code "0x80073cff" which indicates that the package didn't meet the signing requirements.

Detection logic

Detection requirements

Log source product: windows
Log source service: appxdeployment_server

Known benign triggers

Legitimate AppX packages not signed by MS used part of an enterprise.

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
learn.microsoft.com/en-us/windows/win32/appxpkg/troubleshooting	Product documentation	9from 2 sources
news.sophos.com/en-us/2021/11/11/bazarloader-call-me-back-attack-abuses-windows-10-apps-mechanism/	Threat report	6
www.sentinelone.com/labs/inside-malicious-windows-apps-for-malware-deployment/	Security research	9

Detection rules

AppX Package Deployment Failed Due to Signing Requirements

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules