Citibank ATM Breach

Hackers broke into Citibank’s ATMs inside 7-Eleven stores earlier this year and stole customers’ PIN codes.  The hackers netted millions of dollars. The thieves were able to access the PIN numbers by attacking the back-end computers responsible for approving the cash withdrawals.  Hackers are targeting the ATM system’s infrastructure, which often uses Microsoft’s Windows operating system.  It’s unclear how many Citibank customers were affected by the breach, which extended at least from October 2007 to March of this year.  Citibank has nearly 5,700 ATMs inside 7-Eleven stores.