Microsoft last week announced that it's temporarily disabling the MSIX ms-appinstaller protocol handler in Windows following evidence that a security vulnerability in the installer component was exploited by threat actors to deliver malware such as Emotet, TrickBot, and Bazaloader.
MSIX, based on a combination of .msi, .appx, App-V and ClickOnce installation technologies, is a universal Windows http://dlvr.it/SJZv07
