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Researchers have revealed how cyber-thieves sliced into cash machines in order to infect them with malware earlier this year.
The criminals cut the holes in order to plug in USB drives that installed their code onto the ATMs.
Once the malware had been transferred they patched the holes up. This allowed the same machines to be targeted several times without the hack being discovered.
To activate the code at the time of their choosing the thieves typed in a 12-digit code that launched a special interface.
Analysis of software installed onto four of the affected machines demonstrated that it displayed the amount of money available in each denomination of note and presented a series of menu options on the ATM's screen to release each kind.
The researchers said this allowed the attackers to focus on the highest value banknotes in order to minimise the amount of time they were exposed.
Full article
Very clever thieves.