POS malware strains such as Dexter, Alina, vSkimmer, TriForce, and OG are growing less effective. Dexter infiltrated systems with stealth, stole process lists, sorted through memory dumps to acquire payment card data. Dexter was the first POS malware family to add a keylogger to its toolset. VSkimmer updates firewall rules and makes a number of computer system changes to hide and accommodate itself. It can copy data to a USB drive when the Internet is not available for data transfers.”]
Source: https://www.csoonline.com/article/2689234/pos-malware-mayhem-pos-and-the-return-of-pos.html