In December last year, a piece of malware known as Dexter was discovered to be infecting point of sale systems across the globe and allowing criminals to gain access to customer credit card information. It made headlines but was caught early enough that the damage seemed to be minimal.

That was until this month when it was announced that bank's in South Africa have lost tens of millions of rand after it was discovered that a number of fast food locations had their POS terminals and servers infected with malware.

According to Payments Association of South Africa Chief Executive Officer Walter Volker, who spoke with TechCentral, there wasn't a single bank in the country that wasn't affected by the attack.

"It took quite a while to get to the bottom of [this incident], because it was not the standard Dexter malware, which has been around for a while, and which many antivirus software programs can pick up," Volker told the news source. "This one was a variant that was changed to [avoid detection] by the antivirus software."

The malware worked by infiltrating the POS software solution and waiting for the system to process a customer's credit card. It would then copy the information and send it to the criminal's hub, where it was sold and used to create a duplicate card that was used at the original customer's expense.

With the help of an experienced payment solution provider that specializes in POS security, any organization can take steps to ensure all customer information that is passed through their point of sale terminal is safe from cybercriminals.