The group that identifies itself as ‘Guccifer 2.0’ claimed responsibility for posting the data on Friday night on their WordPress blog, CNN reported.
In the trove of information released, ‘Guccifer 2.0’ also uploaded files to the blog post that contained contact information of staff members and campaign aides along with login information to subscription services used by the Democratic Congressional Campaign Committee (DCCC), including Washington newspapers.
“As previously noted, the DCCC has been the target of a cyber security incident, and we are cooperating with federal law enforcement in their ongoing investigation,” DCCC Press Secretary Meredith Kelly said in a statement late Friday.
“We are aware of reports that documents claimed to be from our network have been released and are investigating their authenticity,” CNN quoted Kelly as saying.
According to cyber experts, there was no way to verify the identity of the individual or group known as Guccifer 2.0.
The name is a reference to a Romanian hacker who pleaded guilty to hacking several prominent politicians and figures, including former Presidents George W. Bush and George H.W. Bush, who went online by Guccifer, CNN reported citing the experts as saying.
Last month, Democratic presidential nominee Hillary Clinton’s presidential campaign along with other Democratic Party organisations was hacked as part of a larger cyber attack. It followed two data breaches involving the Democratic National Committee (DNC) and the DNCC.