Two men have pleaded guilty to their part in a multi-million dollar scheme which saw the point-of-sale computers of hundreds of Subway restaurant stores hacked into, and the details of customers' payment cards stolen.
The men - 28-year-old Iulian Dolan, of Craiova, Romania, and Cezar Butu, 27, of Ploiesti, Romania, have admitted being part of a conspiracy to commit computer fraud according to a statement by the US Department of Justice.
The guilty pleas have been offered by the men as part of a plead-bargaining deal that should see Dolan sentenced for a maximum of seven years, and Butu to be freed within 21 months - providing a sentencing judge approves.
Dolan and Butu were part of a gang of four Romanian men arrested in December last year, after - according to the DOJ - stealing the details of more than 146,000 payment cards and inflicting more than $10 million in losses.
According to the authorities, the men identified vulnerable point-of-sale (POS) systems via the internet, and managed to gain access via vulnerable remote desktop software.
Once in place, the hackers were able to plant spyware onto the POS systems to record and store data that was keyed into or swiped through the merchants' POS systems, including credit card data.
This stolen payment card data was then siphoned off to dump sites - some located in Europe, some in the United States - from where it could be used to make unauthorised charges or to transfer funds.
According to the Department of Justice, the two Romanians claim to have been working alongside Adrian-Tiberiu Oprea, another Romanian national and the alleged ring-leader of the gang, who is currently awaiting trial in the District of New Hampshire.
Of course, there's not really anything that customers of Subway could have done to avoid having their credit card data exposed by the hack - other than not shopped at Subway in the first place.
Sloppy security at the restaurant chain (with seemingly vulnerable remote desktop software on computers, with weak, guessable passwords) was enough to allow the hackers to crowbar their way in, and make away with restaurant-goers private information.
The thought of how many other public-facing firms could be similarly poorly-secured certainly leaves a nasty taste in the stomach.Follow @gcluley
Subway store image from Shutterstock.