UPDATE 2: We have received comment from the Clinton Foundation. We have also updated the story with more reporting from around the web calling the hack into question as authentic.

Guccifer 2.0, the hacker persona that has leaked data from a number of Democratic Party entities this year, claims to have struck again. Its target this time: the Clinton Foundation.

The hacker took to Twitter Tuesday afternoon with a new trove of information it claims to have taken from the Clinton Foundation, the organization set up by President Bill Clinton when he exited the White House that has come under significant scrutiny this election cycle. The leak comes just hours after a much-anticipated announcement from WikiLeaks' Julian Assange was a bust.

"I hacked the Clinton Foundation server and downloaded hundreds of thousands of docs and donors' databases," the hacker writes on the site where the data is published. "Hillary Clinton and her staff don't even bother about the information security. It was just a matter of time to gain access to the Clinton Foundation server."

The leak includes documents that, if authentic, appear to include a list of foundation donors, a list of House Financial Services Committee members and a list of financial services firms and how much funding they received through the Troubled Asset Relief Program (TARP), an initiative established in 2008 under President George W. Bush for the government to purchase toxic assets and equity from financial institutions impacted by the financial crisis.

Companies on the list include JPMorgan Chase (JPM) - Get Report , Morgan Stanley (MS) - Get Report and UBS (UBS) - Get Report . Related: Clinton and Trump Both Pose Threat to Wall St., Experts Say

"Once again, we still have no evidence Clinton Foundation systems were breached and have not been notified by law enforcement of an issue," said a Clinton Foundation official. "None of the folders or files shown are from the Clinton Foundation."

The veracity of the documents could not be confirmed. During a spot check of the documents, TheStreet could not match the names listed with public records of donors on the Clinton Foundation website.

TheHillnotes that there are a number of red flags suggesting the documents are from a previous hack of the Democratic Congressional Campaign Committee, not the Clinton Foundation. The donor list matches with DCCC contributions filed with the Federal Elections Commission, and one of the spreadsheets was allegedly created by a 2009 DCCC employee.

Guccifer 2.0 has become a thorn in the Democrats' side this election cycle. Earlier this month it released a trove of documents allegedly revealing information about the Democratic National Committee's finances, donors and network infrastructure as well as memos on tech initiatives from vice presidential nominee Tim Kaine's time as governor. It claimed responsibility for the DNC emails published by WikiLeaks ahead of the Democratic National Convention that resulted in the resignation of DNC Chair Debbie Wasserman Schultz and in August released further material, including communications from the DCCC on the Black Lives Matter movement.

In Tuesday's alleged leak, the hacker signed off with a nod to Assange: "P.S. I'm pleased to congratulate Wikileaks on their 10th anniversary!!! Julian, you are really cool! Stay safe and sound!"