At least one brand of ATM can be robbed by sending the machine a text message, then walking up and collecting the ejected cash. The ATMs, which in this case are actually Windows PCs, need to be running Windows XP and need to be infected with a Trojan called Backdoor.Ploutus.B or simply Ploutus, which can only be installed by loading a CD into the ATMs optical-disk reader. Criminals also have to open the plastic cowling covering the ATMs innards to access the computer.