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

“Mr. Anon” Infostealer Attacks Start with a Fake Hotel Booking Query Email

This new attack is pretty simple to spot on the front, but should it be successful in launching its’ malicious code, it’s going to take its victims for everything of value they have on ...

New Remote “Job” Scam Tells Victims They'll Get Paid For Liking YouTube Videos

Researchers at Bitdefender warn that scammers are tricking victims with fake remote job opportunities. In this case, the scammers tell victims that they’ll get paid for liking YouTube ...

Holiday Scams Include Thousands of Impersonation Phishing Domains per Brand

Midstride in this year’s holiday shopping, it’s important to realize just how many websites exist that impersonate legitimate online retailers. More importantly, your users need to know ...

Unique Malware Used in Cyber Attacks Increases by 70% in Just One Quarter

As more cybercriminal gangs continue to enter the game, the massive increase in unique types of malware means it will become increasingly difficult to identify and stop attacks.

[IRS Alert] Three Tips To Protect Against Tax Season Refund Scams

Urging taxpayers and tax professionals to be vigilant, the Internal Revenue Service (IRS) provides some simple guidance on how to spot new scams aimed at being able to file fake tax ...

Brand New BazarCall Phishing Campaign Abuses Google Forms

A new BazarCall phishing campaign is using Google Forms to send phony invoices, according to researchers at Abnormal Security.

As the Holiday Season Ramps Up, So Do Scams Impersonating the U.S. Postal Service

Taking traditional “delayed package” scams up a notch, new phishing and smishing attack campaigns are leveraging freemium DNS services to avoid detection by security solutions.

Phishing Is Still the No. 1 Attack Vector, With Huge 144% Malicious URL Spike

Analysis of nearly a year’s worth of emails brings insight into exactly what kinds of malicious content are being used, who’s being impersonated, and who’s being targeted.

Undercover Threat: North Korean Operatives Infiltrate U.S. Companies Through Job Platforms

Researchers at Nisos warn that North Korean threat actors are impersonating skilled job seekers in order to obtain remote employment at US companies.