Because that's where the money is

No, not a caper flick (starring Sean Connery as the evil genius?), but an actual Euro ATM robbery...and another, and....;

The thefts came to light in July after the lender involved noticed several its ATMs were being emptied despite their use of safes to protect the cash inside.

After surveillance was increased, the bank discovered the criminals were vandalising the machines to use the infected USB sticks.

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.

The masterminds even protected themselves against employee theft:

To counter this risk the software required the thief to enter a second code in response to numbers shown on the ATM's screen before they could release the money.

The correct response varied each time and the thief could only obtain the right code by phoning another gang member and telling them the numbers displayed.

If they did nothing the machine would return to its normal state after three minutes. 

Now, if they can patent their business plan, and take it public, they can make it really big.