Valid dumps shop offer credit card’s information. In history there are a lot of carder’s cases. In 2013, the American chain of stores Target was subjected to the largest attack. In it, the criminals used the scheme «compromising the supply chain», which was not yet particularly popular at that time. After infecting one of the contractors, the attackers managed to break into a supermarket chain, compromise the entire Windows domain, and break into the operating system directly at the checkout counters. On these systems, so-called RAM-scraping Trojans were launched, which scanned the memory in search of patterns of magnetic stripe tracks. When the tracks were detected, the Trojan forwarded them to the C&C server installed in the internal network, which then sent this information to the external network.