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Microsofthas disabled the ms-appinstaller protocol handler as default after it found new evidence of hackers using it to deploymalware.
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There, they trick them into downloading malware.
A second distribution vector is phishing through Microsoft Teams, the company said.
The handler is disabled in the App Installer version 1.21.3421.0 or higher.
This is not the first time MSIX Windows app package files were abused in malware distribution,TheHackerNewssays.
Whats more, Microsoft disabled the handler once before, in February last year.