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

Phishing Attacks Will Likely Follow Last Week’s Global IT Outage

Organizations should expect to see phishing attacks exploiting the global IT outage that occurred last Friday, the Business Post reports.

CrowdStrike Phishing Attacks Appear in Record Time

I have been the CEO of an anti-virus software developer. We had a special acronym for catastrophic events like this, a so-called "CEE". As in Company Extinction Event. But first: Our ...

78% of Organizations Are Targets of Ransomware Attacks Two or More Times in Twelve Months

New data puts the spotlight on the frequency and impact of modern ransomware attacks, highlighting the overconfidence organizations are showing in their ability to defend and respond to ...

Cyber Threats Targeting the 2024 Paris Olympics

Our friends at the CyberWire reported: "ZeroFox and Fortinet have both published reports on threats facing the 2024 Olympics in Paris. ZeroFox says the primary cybersecurity threat will ...

Change Healthcare Ransomware Attack May Cost Nearly $2.5 Billion

The ransomware attack against UnitedHealth Group’s Change Healthcare platform is expected to cost the company up to $2.45 billion, more than a billion dollars more than was previously ...

7 in 10 Organizations Experienced a Business Email Compromise Attack in the Last 12 Months

Despite ransomware getting the lion’s share of the tech pub headlines, business email compromise (BEC) attacks are alive and well… and having a material impact.

New Ransomware Threat Group Calls Attack Victims to Ensure Payments

Analysis of new ransomware group Volcano Demon provides a detailed look into how and why calling victims ups the chances of ransomware payment.

Malvertising Campaign Impersonates Microsoft Teams

Researchers at Malwarebytes warn that a malvertising campaign is targeting Mac users with phony Microsoft Teams ads. The ads are meant to trick users into installing Atomic Stealer, a ...

[NEW FREE TOOL]: Reveal Your Network's Hidden Weaknesses with KnowBe4's BreachSim Data Exfiltration Simulator

As cyber threats evolve, the target has become crystal clear: your data. A staggering 90% of ransomware attacks now include a data exfiltration component. With this in mind, KnowBe4 has ...

SEC Fines Publicly Traded Company $2.125 Million For Negligence Before, During, and After a Ransomware Attack

According to the filing, the organization in question failed to devise controls to adequately detect, respond to, and disclose an attack that included data exfiltration and service ...