Hackers hit ATM systems forcing them to dispense cash relying on certain commands sent through a smartphone. The black box ATM attack relied on a smartphone and a USB-based circuit board. Cybercriminals can hack ATM systems and force it to dispatch the cash using a smartphone, in the specific case a Samsung Galaxy 4 phone. The company has issued a firmware update to its machine that improves encryption for the communication between the cash dispenser and the ATM core system. The update also includes a feature that block the possibility to roll-back the version of the firmware, the update also blocks the possibility of hackers to make the ATM vulnerable again.”]
Source: https://securityaffairs.co/wordpress/31923/cyber-crime/hacking-atm-galaxy-4-smartphone.html