According to the Dairy Queen website, they discovered evidence that the systems of some DQ locations and one Orange Julius location were infected with the widely-reported Backoff malware that is targeting retailers across the country.
The ice cream and fast food chain says 395 of its stores around the country were affected. The data breach happened between August and September.
According to their website:
You are entitled under U.S. law to one free credit report annually from each of the three nationwide consumer reporting agencies. We encourage you to remain vigilant by reviewing your account statements and monitoring your free credit reports. If you believe your payment card may have been affected, contact your bank or payment card issuer immediately.
See previous DQ post