Guccifer 2.0, the hacker who took credit for the attack on the Democratic National Committee (DNC) servers, has leaked more files from the DNC servers, this time containing personally identifiable information (PII), along with more of the party's financial records.

Earlier this week, security firm CrowdStrike announced that it discovered the presence of malware on DNC's servers, linked to two cyber-espionage groups, Cozy Bear and Fancy Bear, known to have ties to the Russian government.

The company said that it found evidence that one of the groups stole two files from DNC servers, among which, one was a report on the party's main rival, Republican Presidential Candidate Donald Trump.

A day later, a hacker by the name of Guccifer 2.0 penned a blog post claiming responsibility for the DNC hack, blasting CrowdStrike and its report.

To prove he was the man behind the data breach, the hacker released eleven files and said he gave more files to WikiLeaks, which would be publishing them soon.

The hacker wanted to shame CrowdStrike by saying, "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?"

Hacker leaks more files to prove Democratic Party members are lying

Following his initial data dump, Debbie Schultz, a member of the Democratic Party, told the media that the hacker didn't manage to steal any files that contained sensitive information.

It appears the hacker is keeping a close eye on US politics, because a day later, Guccifer released 20 more files, and this time, he made sure to include documents that contained the personal details of Democratic Party donors, along with some of the party's financial records.

The hacker leaked a series of Excel spreadsheets containing the names, email addresses, occupations, and phone numbers of thousands of donors.

The hacker also leaked files that contained an analysis of Hillary Clinton's speech and body language, along with various memos and reports exchanged by DNC staffers.

Previously, in its first data dump, the hacker released a list of files with Democratic Party donors but with no personal details, the DNC report on Trump, along with a report stolen from Clinton's computer marked with the "secret" watermark.

Some security experts are pointing out that, in spite of the hacker coming forward and claiming responsibility, he may still be one of the members of the suspected Russian cyber-espionage groups, trying to shift public focus away from his government.