You can see the email spool highlighted in this screenshot of the file names in the recent dump. Kim Zetter

The hackers behind the Ashley Madison breach appear to have upped their game, if that was even possible, by taking direct aim at the company's top executive, Noel Biderman, CEO of Avid Life Media, AshleyMadison's parent company.

On the heels of releasing 10 gigabytes of data on Tuesday, they released a new, bigger batch of data that's about 20 gigabytes worth of compressed files. And while the first batch mostly exposed Ashley Madison's covert customers, this latest may prove to be more embarrassing to the company's executives. Judging by the file names in the latest dump, they appear to include email spools belonging to Ashley Madison's top executive. One file bears the name noel.biderman.mail.7z, a likely reference to Biderman.1

The new release is accompanied by the note: "Hey Noel, you can admit it's real now." The message is likely a response to assertions made by the company's former CTO this week, who tried hard to convince reporters after the first leak occurred that the data dump was fake.

Notice the hackers signed the new message with their PGP key to prove their identity. Kim Zetter

1: Updated on 8/21/2015 at 5:42 p.m. ET The email file released Thursday turned out to be corrupted and could not be opened. But the hackers released a new version of the email file on Friday.