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How to block malicious JavaScript files in Windows environments

December 30, 2020

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There have been several recent reports of fake updaters that spoof Google Chrome, Mozilla Firefox, and Internet Explorer landing pages. When the user clicks on the upgrade option, a JavaScript file is downloaded and executes malware. You have several options to block or change the default behavior to better protect workstations.

Block JavaScript at the email gateway

First and foremost, block .js and .jse file types at the email gateway. There is no logical reason to be receiving or sending JavaScript files to the average user.

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