KnowBe4 Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in human and agent security including social and prompt engineering, ransomware and phishing attacks.

Stu Sjouwerman

Founder and Executive Chairman

Stu Sjouwerman (pronounced “shower-man”) is the Founder and Executive Chairman of KnowBe4, Inc., which hosts the world’s most popular integrated security awareness training and simulated phishing platform, with over 54,000 organization customers and more than 50 million users. A serial entrepreneur and data security expert with 30 years in the IT industry, Stu was the co-founder of Inc. 500 company Sunbelt Software, a multiple award-winning anti-malware software company that was acquired in 2010.


Recent Posts

BEC Scam Litigation Demonstrates How Your Company Can Be Out $500,000

The case of Arrow Truck Sales Inc. v. Top Quality Truck & Equipment tells a familiar tale, but provides insight into how the law interprets cases and who’s at fault.

New “Back to Work” HR-Themed Phishing Scam Works to Steal Internal User Credentials

Using a fake internal memo from HR, per-user custom-named email attachments, SharePoint Online, and a realistic-looking HR form, this phishing attack has all the ingredients to trick your ...

Think Tanks Targeted by APT Actors

The US Cybersecurity and Infrastructure Security Agency (CISA) and the FBI have issued a joint advisory warning that nation-state advanced persistent threat (APT) actors are targeting US ...

How Are Credential-Theft Phishing Websites Avoiding Detection? They Just Invert the Website Background

Sometimes the easiest solution is the best solution. And in the case of phishing attacks intent of stealing credentials using a fake logon page, it appears that background inversion does ...

Number of Phishing Websites Double and Unique Phishing Campaigns Triple in Q3

New data shows the bad guys have been working diligently to step up their game on both the front and back end of phishing attacks, despite still being mid-pandemic.

Maze Ransomware Group Retires (Retires!), Leaving a Gap in the Ransomware Marketplace

The news last month of the “retirement” of Maze should be a warning to organizations wondering what ransomware will come next and how much worse will it be.

KnowBe4 Fresh Content Updates from November: Including A New Holiday Training Resource Kit

Here are important fresh content updates and new features to share with you for the month of November.

Average Ransomware Payment Significantly Increases Risk

The average ransomware payout has increased by 178% over the past year, according to researchers at Atlas VPN. In Q4 2019, the payments averaged $84,000. By Q3 2020, the average payment ...

[HEADS UP] FBI Warns US Companies of BEC Scammers

The Federal Bureau Investigation is issuing warnings to US companies that are taking advantage of email auto-forwarding. If successful, this would fall right into the trap of a business ...

South African Post Office Issues Warning on Postal Phishing Attack

The South African Post Office recently issued a warning about a phishing attack. The post office advised everyone to delete the email immediately.