Hundreds of millions of accounts and passwords from some of the most popular email services have been stolen and are circulating among Russian hackers.
The majority of the accounts are from Mail.ru, but many are also from Gmail, Yahoo Mail, and Microsoft Hotmail, according to Alex Holden, founder of Hold Security.
Holden has previously unveiled the cyberattacks on JP Morgan and Target.
This is one of the biggest cyberattacks in the past 2 years, Reuters reports.
Holden said a Russian hacker had dumped 1.17 billion records on an internet forum. After eliminating duplicates, Holden found that there was account information on 57 million of the 64 million Mail.ru accounts, and login information for tens of millions of Gmail, Yahoo Mail, and Microsoft Hotmail.
