A North Korean hacking agency has devised a new way to trick ATMs into releasing large quantities of cash. The scheme is targets switch application servers. The switch application server is used to communicate with the bank to validate a user’s account details for a requested transaction, such as a withdrawal.
The hackers first infected these servers with malware. Next, they attempt to make a withdrawal. The malware infected server sends back a fake affirmative response which then makes the ATM think the request has been accepted. The bank never gets notified.
https://thehackernews.com/2018/10/bank-atm-hacking.html
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