An alleged hacker has claimed responsibility for a year-long breach at the Democratic National Convention and has released multiple documents in an attempt to prove it.
On Wednesday, an individual using the moniker 'Guccifer 2.0' disputed security firm CrowdStrike's attribution of a recently disclosed hack at the DNC:
"Worldwide known cyber security company CrowdStrike announced that the Democratic National Committee (DNC) servers had been hacked by 'sophisticated' hacker groups. I’m very pleased the company appreciated my skills so highly))) But in fact, it was easy, very easy. Guccifer may have been the first one who penetrated [Democratic presidential nominee] Hillary Clinton’s and other Democrats’ mail servers. But he certainly wasn’t the last. No wonder any other hacker could easily get access to the DNC’s servers. Shame on CrowdStrike: Do you think I’ve been in the DNC’s networks for almost a year and saved only 2 documents? Do you really believe it?"
The DNC called CrowdStrike back in April to investigate suspicious network activity detected by its IT teams.
In a blog post published on Wednesday, the security firm stated it found two Russian threat actors had infiltrated the DNC's network: COZY BEAR and FANCY BEAR. It also reported that neither of the groups had accessed financial or donor information.
Contesting these findings, Guccifer 2.0 published a 237-page dossier of what appears to be the DNC's opposition research on Republican presidential nominee Donald Trump. They also published a file that appears to list about two dozen people who donated at least $500,000 to the DNC as well as files containing other donor information and attendance information for fundraising events.
These documents' authenticity could not be verified as of this writing.
For its part, CrowdStrike is standing by its findings:
"CrowdStrike stands fully by its analysis and findings identifying two separate Russian intelligence-affiliated adversaries present in the DNC network in May 2016. On June 15, 2016 a blog post to a WordPress site authored by an individual using the moniker Guccifer 2.0 claiming credit for breaching the Democratic National Committee. This blog post presents documents alleged to have originated from the DNC. Whether or not this posting is part of a Russian Intelligence disinformation campaign, we are exploring the documents¹ authenticity and origin. Regardless, these claims do nothing to lessen our findings relating to the Russian government’s involvement, portions of which we have documented for the public and the greater security community."
Guccifer 2.0 has passed the remaining documents they allegedly stole from the DNC to WikiLeaks, who "will publish them soon."
The alleged hacker could not be reached for comment by Motherboard on Thursday.