Chrome Extension “Video Downloader GetThemAll 30.0.2” might contain malware

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So I have been using this extension for a while and all of a sudden it was disabled. When going to the extension to see what happened, Chrome reports that the extension contains malware and for this reason it is disabled.

What could have happened?

As it happened to other popular extensions, it could have been modified to include malicious behavior, transferred ownership to potential malicious owners, have been hacked or update included policy violating feature (e.g., download from YouTube)–but we don’t know. There is also a rumor that the extension was mining cryptocurrency. It is time to analyze version 30.0.2 in details in order to understand what information could have leaked, if any.

Though GetThemAll 30.0.3 is already available on Chrome web store, probably it is better to stay away until further results on what happened on the previous version.

A quick look at the diff of version 30.0.2 and 30.0.3 shows, the earlier has a suspicious obfuscated “background.js” file that accesses the images/video_help.png file, which also exists only in version 30.0.2.

Cheers

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