“The hacker is believed to have stolen the IDs of 1.5 million Facebook users. If accurate, that means one out of every 300 Facebook users may have been victimized. Kirllos is selling the information on an underground hacker website, according to VeriSign’s iDefense Labs. The cybersecurity company estimates that kirllos has sold around 700,000 accounts so far, but VeriSign was unable to verify if any of the accounts are legitimate accounts belonging to real Facebook users.

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(Facebook Accounts Sold by Russian Hacker Kirllos; User Logins For Sale – ABC News)