Explore the vulnerabilities of Point of Sale (POS) terminals in this 31-minute Black Hat conference talk. Delve into the world of cloned terminals and fake merchant accounts as speakers Aleksei Stennikov and Timur Yunusov uncover how these devices, despite multiple layers of protection, end up on the dark market. Examine the hardware, software, service mode, and file system of POS terminals, with a focus on the MX Series Verifone. Gain insights into the "Rules of POSWorld" and understand the potential risks associated with hands-on payment devices. Learn about the security challenges facing POS systems and the implications for merchants and consumers alike.