Credit card breach that hit Jimmy John's is larger than originally thought

An additional 108 restaurants were also affected, said credit-card processor Signature Systems

Signature Systems says the breach of its point-of-sales system that hit 216 Jimmy John's sandwich shops is actually 50 percent larger than originally thought.

The company said Friday that an additional 108 restaurants that use its payment terminals were also hit. The additional locations are independent restaurants not part of the Jimmy John's chain.

The breach is thought to have begun on June 16 when someone began gaining access to the terminals through a user name and password that are normally used to remotely manage the devices. Companies like Signature Systems use remote management so they don't have to send a technician to each store, saving time and money but also opening the devices up to just the sort of attack that happened.

It wasn't until July 30 that the company first learned there could be a problem. It took a week for the malware to be removed from most terminals, although it wasn't completely gone from just about all until mid-September. At some restaurants, the company still hasn't verified that the malware has been removed, but says the attack has been blocked.

The malware installed was capable of stealing the cardholder's name, card number, expiration data and verification code from the magnetic stripe on the back of the card.

Cards used at the affected locations in a three-month period from mid-June were potentially at risk of being compromised. The company has posted a list of all independent restaurants and the time frames in question on its website, and there's a similar list on the Jimmy John's website.

It shows, for example, that at the Roman Delight restaurant in Southampton, Pennsylvania, the malware was present for just four days in mid-June, while at Apollo Pizza in Philadelphia, the malware was present for three months.

The bad news for consumers is that Signature Systems says it's unable to identify the specific cards that were stolen, so it doesn't know the names and addresses of potential victims. The company is asking customers who used payment cards at the restaurants to watch for fraudulent charges and notify their bank if they appear.

Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service. Follow Martyn on Twitter at @martyn_williams. Martyn's e-mail address is martyn_williams@idg.com

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags malwareSignature Systems

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Martyn Williams

IDG News Service
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?