According to a report from The Wall Street Journal (Warining: may be paywalled), U.S. officials are all but certain that the hacker Guccifer 2.0, who hacked the Democratic National Committee in June, is connected to a network of individuals and groups who are being shielded by the Russian government to mask its involvement in cyberintrusions. Even though the hacker denies working for the Russian government, the hacker is thought to be working with the hacking groups Fancy Bear and Cozy Bear, which have ties to the Russian government. The Wall Street Journal reports: Following successful breaches, the stolen data are apparently transferred to three different websites for publication, these people say. The websites -- WikiLeaks, DCLeaks.com and a blog run by Guccifer 2.0 -- have posted batches of stolen data at least 42 times from April to last week. Cybersecurity experts believe that DCLeaks.com and Guccifer 2.0 often work together and have direct ties to Russian hackers. Guccifer 2.0 said in a Twitter direct message sent to The Wall Street Journal that he wants to expose corruption in politics and shine light on how companies influence policy. The hacker said he also hopes to expose "global electronization." "I think I won't have a better opportunity to promote my ideas than this year," Guccifer 2.0 added in a long exchange with a Journal reporter. The Journal cannot verify the identity of the person sending messages on behalf of Guccifer 2.0, but the account is the same one that was used to publish personal information about Democrats. A posting on a blog run by Guccifer 2.0 says he is a man who was born in Eastern Europe, has been a hacker for years and fears for his safety. "I think u've never felt that feeling when u r crazy eager to shout: look everyone, this is me, this is me who'd done it," the hacker wrote to the Journal. "but u can't." WikiLeaks officials didn't respond to requests for comment on whether Russia fed them the stolen files published by WikiLeaks in July. A representative for DCLeaks.com asked the Journal to submit questions via email but hasn't responded to them. Last week, U.S. intelligence chielf James Clapper said it "shouldn't come as a big shock to people" that Russia is behind the hacking operation. While Russia has tried to interfere in U.S. elections since at least the 1960s by spying and funneling money to particular political groups, "I think it's more dramatic maybe because now they have the cyber tools," he said.