Its Micros system Oracle, which you have probably used to pay for something by debit or credit card has been breached.
At present, it is not yet known how big the data is, but a source told the researcher Krebs journalist that 700 systems may have been affected.
A hacker group known as the Carbanak Gang (referred to by Krebs as "a Russian organized cybercrime group" accused of stealing more than $ 1 billion from banks and retailers in recent years) is believed to be responsible for the breach.
Oracle acknowledged the hack, stating that it was “detected malicious codeς σε ορισμένα συστήματα της Micros” και ζήτησε από τους πελάτες της να αλλάξουν τους κωδικούς πρόσβασης που συνδέονται με τα MICROS point-of-sale.
Investigators believe the breach began on a single system internally network of Oracle, and spread through a Micros "ticket portal" that usesfor customer assistance.
From there, hackers managed to steal user names and passwords from Micros users when they were logged on to the Web portal to check the answer bills or to manage their accounts.
It is not known how this particular hack can affect it. The most likely scenario is that hackers gained access to Micros, to put malware at the point-of-sale and steal credit card information.
Oracle is still investigating the violation but has not yet announced how deeply the hackers have reached.