After federal prosecutors unsealed indictments this week against four men they say were responsible for a 2014 intrusion into Yahoo’s systems<br />that affected 500 million user accounts, data on one billion accounts — stolen in another attack on the company a year earlier — appeared to remain available on underground hacker forums on Friday.<br />One Billion Yahoo Accounts Still for Sale, Despite Hacking Indictments -<br />By VINDU GOELMARCH 17, 2017<br />SAN FRANCISCO — For sale: one billion Yahoo accounts, $200,000 or best offer.<br />He said the person or people behind the 2013 intrusion probably sold, traded or were<br />forced to share their access to Yahoo’s systems with Russian intelligence services.<br />The two Russian intelligence agents indicted in the 2014 breach are accused of using<br />that access to conduct their own spying operation with the assistance of Mr. Belan and another conspirator in Canada.<br />Alex Holden, founder of Hold Security, a cybersecurity firm, said one prevailing<br />theory in the industry was that Mr. Belan capitalized on the earlier breach.<br />Alexsey Belan, the technical expert who was charged with breaking into Yahoo’s systems in<br />2014 at the behest of two Russian intelligence officers, has a long record of cybercrime.<br />In 2013, Mr. Belan struck again, hacking into Evernote<br />and Scribd, two digital document storage services, according to a federal indictment filed against him that June.
