South African bank Postbank was robbed of $6.7 million earlier this month. But the thieves didn't need masks and guns to pull off the job — just computers.

To pull off the heist, the hackers created a backdoor into one of the bank's computers. From that hacked computer, they were able to access the rest of the network and issue the commands to distribute the $6.7 million to different accounts owned by the thieves. Those accounts were promptly emptied via ATM visits.

Since the crime didn't raise any red flags with its automated fraud-detection programs, bank employees failed to notice the money was missing until the bank re-opened after the New Year's holiday.

The police and the South African government are currently investigating the crime. Because of the level of knowledge of the bank's security system, it is believed that the hackers were either employees or acting with an employee's assistance.

[Image credit: pasukaru76]

(Source)

This article was written by Fox Van Allen and originally appeared on Tecca

More from Tecca: