The attacks mark a new technique for cybercriminals, who traditionally stole money from consumer banking accounts or hit ATMs with fraudulent cards or other tricks on a single machine. Over the past 18 months, some criminals have turned to bank networks, breaking in and then finding ways to make dozens of machines unload their cash simultaneously.

Source: Hackers Program Bank ATMs to Spew Cash – WSJ

Good risk programs likely would have identified this as a possibility.