Malicious Cookie Stuffing Chrome Extensions with 1.4 Million Users

Experts have investigated several malicious extensions in google chrome and discovered 5 extensions with a total install base of over 1,400,000 which are highly malicious.

The extensions offer various functions such as enabling users to watch Netflix shows, shares website coupons, and allows taking screenshots of a website.   Apart from offering the access to Netflix, the extensions also track the user’s browsing activity.  Every website visited is sent to servers owned by the extension owner. They do this so that they can insert code into eCommerce websites being visited. This action modifies the cookies on the site so that the extension owner receive affiliate payment for any items purchased.

The users of the extensions are unaware of this functionality and the privacy risk of every site being visited being sent to the servers of the extension authors.  

The 5 extensions are:  

Name Extension ID Users 
Netflix Party mmnbenehknklpbendgmgngeaignppnbe 800,000 
Netflix Party 2 flijfnhifgdcbhglkneplegafminjnhn 300,000 
FlipShope – Price Tracker Extension   adikhbfjdbjkhelbdnffogkobkekkkej 80,000 
Full Page Screenshot Capture – Screenshotting   pojgkmkfincpdkdgjepkmdekcahmckjp 200,000 
AutoBuy Flash Sales gbnahglfafmhaehbdmjedfhdmimjcbed 20,000 

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