A group hackers, who call themselves "Anonymous Ukrain"Claim that they hold 800 data of millions of stolen credit and debit cards.
To prove their claims, the hackers uploaded a part of the data to file-sharing websites and posted links to Pastebin, referring to the violated data.
The files are 300MB in size and contain information on 7 million MasterCard, Visa, Discover and American cards Express. Ορισμένοι ερευνητές υποστηρίζουν ότι τα δεδομένα προέρχονται εν μέρει από τις επιθέσεις κατά της αμερικανικής εταιρείας Target - American politicians blame hackers from Ukraine for penetration into the retail chain computers and the tapping of 40 million payment cards.
However real identity of hackers remains in question. According to security researchers at Massive PR, the hacking team behind the leak exploits the name Anonymous Ukraine, but is actually a completely different group.
Ukrainian Anonymous uses some standard social network accounts to promote their actions: @UkraineAnon on Twitter, Anon.Ukraine on Facebook, and Ukrhack on vk.com. These profiles have been used for some time, drawing attention to the unrest in Crimea, and the ongoing conflict between Russia and Ukraine.
However, none of the hackers' accounts have reported the credit card leak, which was announced through the @Op_Ukraine account. The specific profile on Twitter, which has been active for three days, has posted messages that relate exclusively to data leakage.
"We believe that someone is trying to use the name Anonymous Ukrain," said Zimmatore El Reg of Massive PR. "[The leak] was not announced by the official accounts of Anonymous social networks, which usually proudly announce such achievements."
"We have noticed, however, that data leakage is being discussed almost exclusively by the Russian Forum," the investigator noted, pointing out that Russian hackers may be behind "Anonymous Ukrain".