On the day many expected WikiLeaks to dump incendiary documents about Democratic presidential nominee Hillary Clinton, the hacker known as 'Guccifer 2.0' stole the show, claiming to have hacked the Clinton Foundation.

"Many of you have been waiting for this, some even asked me to do it," Guccifer 2.0 wrote in a blog post on Tuesday. "So, this is the moment. I hacked the Clinton Foundation server and downloaded hundreds of thousands of docs and donors' databases."

But the hacker's latest alleged feat appears to be a complete lie.

Shortly after the hacker's blog post, officials from the Clinton Foundation denied it.

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

And as The Hill noted, many of the individuals who appear in the alleged Clinton Foundation donors' list are actually not donors, according to the foundation's own public disclosure. And some of the people in the list appear to be contributors to the Democratic Congressional Campaign Committee (DCCC), which was also allegedly hacked by Guccifer 2.0.

Even the Daily Caller, hardly a pro-Clinton news outlet, wrote that "a review of the newly released documents reveals no information about the Clinton Foundation."

All things considered, it seems like Guccifer 2 is lying.

The hacker said that the foundation denials don't matter "for this is just a tiny part of the files I got from their server."

"They'll see, they'll see," he told Motherboard via Twitter direct message. "Nancy Pelosi also denied that her pc was hacked but it was."

Guccifer 2.0 surfaced in late June, claiming to be the hacker behind the data breach of the Democratic National Committee, which security experts and the company that investigated it suspect was conducted by Russian government spies.

At the time, Guccifer 2.0 claimed to be a lone Romanian hacker trying to expose the "illuminati," and denied being Russian. But he could not actually speak Romanian, and numerous experts believed he was just a rather clumsy attempt by the Russian government to cover up their own hack.

In the following weeks, as researchers poured over the evidence, it became clear that all signs pointed to Russia being behind the DNC hack, and not a lone hacker named Guccifer 2.0 who loves Gucci and women, as he described himself in an exclusive interview with Motherboard. And while there's still no conclusive proof, the hacker's evolution from an almost clueless hacktivist to a sophisticated, professional leaker, seemed to confirm the theory.

This latest release, designed to make it look like the Clinton Foundation was another victim in his seemingly endless series of data breaches, seems to confirm what everyone already suspected.

This story has been updated to include Guccifer 2.0's comments.