A Russian-linked hacker has taken credit for the leak of alleged cell phone numbers and email addresses of nearly all Democrats in the House of Representatives. The hacker claims to be responsible for infiltrating several Democratic organizations.
The leak, which came on Friday, was a part of a large release of documents hacked from the Democratic Congressional Campaign Committee. Last month, the DCCC admitted that it had been hacked.
DCCC event memos, the campaign overviews of certain House races and committee passwords were also leaked.
The hacker, who goes by the name Guccifer 2.0, also claims to be the mastermind behind the Democratic National Committee intrusion.
“All of you may have heard about the DCCC hack,” Guccifer 2.0 said in a blog post. “As you see I wasn’t wasting my time! It was even easier than in the case of the DNC breach.”
Researchers say Guccifer 2.0 is merely a front for a well-known hacking group that has ties to Russia’s military intelligence agency known as Fancy Bear. The group has been linked to several cyberattacks at the DNC and the DCCC.
Kelly Ward, DCCC executive director, advised lawmakers to avoid answering calls from unknown numbers and opening unsolicited emails.
While the Democratic Party has been the central focus of the cyber-attacks, researchers say that the hackers may have also targeted Republican lawmakers.