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

Warning: A New Ransomware Cartel Has Formed Sharing Techniques, Code, and Infrastructure

In a new twist, security researchers at Analyst1 have identified four Russian ransomware gangs that actively work together to coordinate attacks, data leaks, and more.

U.K. Employees Pose a Major Cybersecurity Risk to Business as They Return to the Office

After well over a year of getting used to working from home, as U.K. employees look to head back into the office, new data shows they don’t see themselves as a cyber risk (which makes ...

77% of Organizations Are Unable to Access Systems or Networks Post-Ransomware Attack

The fallout after a ransomware attack is more devastating than previously thought. New data spells out what you should really expect after being hit with ransomware.

Phishing Attacks Surged in Q2 2021

Phishing activity increased dramatically in the second quarter of 2021, according to a recent report by Vade. The company observed 4.2 billion phishing emails in June alone.

Milanote Exploited to Host Phishing Content

Researchers at Avanan warn that attackers are exploiting the collaboration and note-taking app Milanote to host phishing links.

Remote Employees Adopt Bad Cybersecurity Habits While Working from Home

A new report focused on businesses looking to bring employees back to the office makes it very clear that security leaders are concerned, as remote workers have been anything but secure.

U.S. State Department Issues a Reward for Information on Foreign Cybercriminals Targeting Critical Infrastructure

In the wake of cyberattacks targeting U.S. infrastructure organizations, the U.S. government is stepping up measures to identify foreign threat actors and bring them to justice.

Updated Ransomware Simulator Now With 23 Latest Infection Scenarios

As ransomware techniques continue to evolve, two new ransomware strains, DearCry and Black Kingdom, were blamed for the huge Microsoft Exchange server attacks earlier this year, which ...

Microsoft Takes Down Homoglyph Domains

Microsoft has taken legal action to shut down eighteen domains that were being used in business email compromise (BEC) attacks. The sites in question used homoglyphs to impersonate ...