The untold story about ATM Malware

Everyone talks about ATM Malware, we can see videos in Internet hacking these machines but no one explains HOW an attacker can take control of an ATM and command it to dispense the money at will. Is it possible to control an ATM from a cell phone? What about a Man-in-the-middle attack to intercept the traffic between the ATM and the bank? Come to my talk and learn these and many other techniques used from Venezuela to Russia Hackers that are emptying ATMs without restrictions.