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Home Malware

False Browser updates on the rise

Paul Anderson by Paul Anderson
January 11, 2014 - Updated on May 18, 2022
in Malware
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ff shylock wm
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For those who have physically updated their browser within the last week, think back about how you did it. Did you search for the upgrade on your own, or did you acquire an update following an alert stating you need to pick up a “critical update”?

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If you had the alert and are living in the UK, then chances are you fell for the most recent malware delivery campaign that has been started prior to New Year’s Eve.  Chances are you went to some sort of free movie streaming or media site, and a harmful ad redirected you to a different website.

“The website, which is hosted in the Ukraine, uses a dual hybrid Web server setup by Apache and Nginx, with the latter identifying the victim’s browser and performing a redirect,”  a Symantec employee explained in a recent post.

On the webpage you ended up on, an alert utilizing a template equivalent to your browser type was displayed, and you also were supplied the update for download. If you had rejected the update, a JavaScript loop would’ve pushed you to remain on the website by making it difficult to close your browser until you executed a substantial number of repetitive clicks.

Browser_update

For those who have downloaded and ran the “updated browser”, you should consider that your computer has been compromised by an information-stealing Shylock Trojan, and you need to utilize an AV solution to remove it.  If you don’t have one readily available, please follow this guide to download, update and scan using Malwarebytes.

Tags: javascriptmalwareSpreading CampaignsymantecvirusWeb browser
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Paul Anderson

Paul Anderson

Editor and chief at ZeroSecurity. Expertise includes programming, malware analysis, and penetration testing. If you would like to write for ZeroSecurity, please click "Contact us" at the top of the page.

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