Electronics

Google to ban JavaScript attachments in Gmail

Google to ban JavaScript attachments in Gmail”

Gmail also blocks password protected files and archives as these, too, can be used to send malicious payloads.

Google has announced that it will soon prohibit users from sending Javascript files over email, according to a post on the official blog for GSuite, Google's business and enterprise tools. "More hackers are using ".js" files as malicious programs and this could potentially harm users.

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If you're not familiar with web development, JavaScript is a common language used when developing web applications, and JS files are often loaded as part of web pages.

Thus, if someone tries to attach a JavaScript file to an email via Gmail, a warning message will be displayed and the file will be blocked from attachment. However, opening an unknown JS file on Windows can be risky, as it runs inside Windows Script Host by default. Most of these file types have always been abused by cybercriminals to send malware via email. The company says that when you attempt to attach the file type once the restriction is in place, you'll be presented with a warning explaining the reasoning. "Hiding JavaScript under a zip file or any similar compressed file will not work either as the new algorithm can still detect that there is a ".js" file in the attachment.

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In the name of security, Gmail will begin a permanent ban on attachments with.js file extensions on February 13, 2017. Based on the images floating around the web, banned files can not be uploaded as an attachment. The notification "Blocked for security reasons!" will also be displayed. If a password protects them, you can not send them either.

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