A new kind of point-of-sale malware similar to that which struck Target is being sold in underground markets. The malware was found on VirusTotal, a website where people can submit malware samples to see if one of several dozen security applications detects it. 

It had also been advertised on an underground carding website, where people buy and sell stolen payment card data. Retailers across the USA have been hit hard by malware that scans the volatile memory of computers connected to point-of-sale systems, which handle card payments. It appears to share some of the same source code as Dexter and other characteristics of Chewbacca.