Hackers can trick ATMs into spitting out unlimited amounts of cash, regardless of the customer’s balance. They can also schedule the illicit withdrawals for holidays and weekends, when the ATMs are extra flush. The Secret Service is calling this strategy Unlimited Operations. A recent ATM theft netted over $40 million in fraud using only 12 debit card accounts, the council says. The hackers have actually been targeting bank employees with phishing scams in order to get their malware installed on the banks’ computer systems.”]
Source: https://gizmodo.com/atm-hackers-have-figured-out-how-to-withdraw-unlimited-1557714644