With the help of an Internet service provider, First Bank System Inc. said it has thwarted a credit card scam that is seen as indicative of a new wave of electronic security threats.

First Bank disclosed the incident last week, saying it learned in mid- March that valid account numbers had appeared on an Internet server. They were likely created with software that generates random numbers.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.