Wendy's takes bite out of data hack

Unusual credit card activity is off the menu at Wendy's.

Wendy's, the burger chain that made "Where's the beef?" a thing in 1984, said Wednesday it was able to "eradicate" malware on point-of-sales systems at around 300 restaurants. The malware led to unusual credit card activity beginning in autumn 2015.

The company said cybersecurity experts it hired to investigate the problem found malware was apparently installed through the use of "compromised third-party vendor credentials." The malware affected one of the sales systems used by its franchisees, but not Aloha, it's Hawaiian-themed primary POS.