FBI has lead in probe of 1.2 bln stolen Web credentials
By Nate Raymond
That hacker, known as "mr.grey," was identified based on data from a cybsecurity firm that announced in August 2014 that it had determined an alleged Russian crime ring was responsible for stealing information from more than 420,000 websites, the documents said.
The papers, made public last week by a federal court in Milwaukee, Wisconsin, provide a window into the Federal Bureau of Investigation's probe of what would amount to the largest collection of stolen user names and passwords.
The court papers were filed in support of a search warrant the FBI sought in December 2014 and that was executed a month later related to email records.
The FBI investigation was prompted by last year's announcement by Milwaukee-based cybersecurity firm Hold Security that it obtained information that a
Russian hacker group it dubbed CyberVor had stolen the 1.2 billion credentials and more than 500 million email addresses.
The FBI subsequently found lists of domain names and utilities that investigators believe were used to send spam, the documents said.
The FBI also discovered an email address registered in 2010 contained in the spam utilities for a "mistergrey," documents show.
A search of Russian hacking forums by the FBI found posts by a "mr.grey," who in November 2011 wrote that if anyone wanted account information for users of Facebook, Twitter and Russian-based social network VK, he could locate the records.
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