Magecart strikes again, one of the most notorious hacking groups specializes in stealing credit card details from poorly-secured e-commerce websites.
According to security researchers from RiskIQ and Trend Micro, cybercriminals of a new subgroup of Magecart, labeled as “Magecart Group 12,” recently successfully compromised nearly 277 e-commerce websites by using supply-chain attacks.
Magecart is the same group of digital credit card skimmers which made headlines last year for carrying out attacks against some big businesses including Ticketmaster, British Airways, and Newegg.
The third-party library targeted by Magecart Group 12 is by a French online advertising company, called Adverline, whose service is being used by hundreds of European e-commerce websites to display ads.
What’s more? Security researcher Yonathan Klijnsma at RiskIQ discovered that the skimmer code for MageCart Group 12 protects itself from de-obfuscation and analysis by performing an integrity check twice on itself.
Upon infection, the data-skimming code first checks if it is executed on an appropriate shopping cart web page. It does so by detecting related strings in the URL like ‘checkout,’ ‘billing,’ ‘purchase,’ ‘panier,’ which means ‘basket’ in French, and ‘kasse,’ which means ‘checkout’ in German.
Once it detects any of these strings in the URL, the script will start performing the skimming behavior by copying both the form name and values keyed in by the user on the webpage’s typing form.
The researchers also published the IOCs associated with this Group 12’s operation, which includes the domains the skimmers used for injecting their code into the affected websites and receiving the stolen payment information.