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Hundreds of E-commerce Websites Injected with Skimming Code That Steals Payment card Data

Hundreds of E-commerce sites infected with the malicious skimming code that steals the customer payment card from checkout pages.

The malicious code found inserted with number of e-commerce websites providing various services such as ticketing, touring, flight booking services and shopping cart sites.

According to TrendMicro analysis report, 277 e-commerce sites found injected with the malicious skimming codes. With further analysis researchers observed that the e-commerce websites are mot directlu compromised.

The skimming codes are injected through the third-party JavaScript library provided by the French online advertising company Adverline. This allows the website that embedded with third-party libraries to load the skimming code.

“Unlike other online skimmer groups that directly compromise their target’s shopping cart platforms, Magecart Groups 5 and 12 attack third-party services used by e-commerce websites by injecting skimming code to JavaScript libraries they provide.”

The inserted skimmer script capable of reading the payment information entered on the checkout pages by the users and send the data to the attacker’s server.

With Adverline’s case Magecart Group 12 embedded the skimming toolkit employs two obfuscated scripts, the first script capable of reverse engineering and the second one is the skimmer.

The first script constantly check for browser debugger console and cleand the messages to deter detection and analysis. Second script checks for the pages that contains following strings such as “checkout,” “billing,” and “purchase.

If the script finds any of the targeted string the script will get executed and perform the skimming activity. The captured payment data including random number, e-commerce website’s domain are sent through HTTP post request with Base64 coding.

According to RiskIQ’s analysis, the Group 12 built its own infrastructure in September 2018 and the group will not inject URL with a script tag, instead, it uses a small snippet with a base64 encoded URL.

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