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

IBM: Phishing is the Most Common Way to Gain Access to Victim Networks

New research from IBM shows four reasons why phishing attacks are still effective and remains the primary attack vector in 41% of cyberattacks.

KnowBe4 Top-Clicked Phishing Email Subjects for Q2 2022 [INFOGRAPHIC]

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. We analyze 'in the wild' attacks reported via our Phish Alert Button, top subjects globally clicked on in ...

Nearly Half of Organizations Have Experienced Vishing

Forty-seven percent of organizations have experienced voice phishing (vishing) attacks over the past year, according to researchers at Mutare. Additionally, the researchers found that ...

New Report Reveals that Ransomware and Business Email Compromise Attacks Cause Nearly 70% of Cyber Incidents

Do you know your organizations true security risk and where to prioritize your resources? A new report from Palo Alto Networks sheds some light on these questions and shows multiple ...

[BEWARE] Microsoft and Facebook are the Most Abused Brands for Phishing Attempts

We all know that big brands can be exploited by bad actors in order to execute successful phishing attacks. Now a new study is showing phishing attacks leveraging big brands Microsoft and ...

Malvertising With Google Ads

Researchers at Malwarebytes warn that a large malvertising campaign is exploiting Google ads to redirect users to phishing sites.

Microsoft USB Scam Shows the Importance of Security Awareness Training

Just when you thought scammers couldn't get more tricky in their attacks, this example will prove you wrong. One of our KnowBe4 colleagues shared this LinkedIn post on a recent very ...

Ransomware Groups Get Smaller and More Social

The Colonial Pipeline ransomware attack of 2021 put infrastructure operators on notice that they were directly in the crosshairs of big ransomware gangs. The reaction of law enforcement ...

[Heads Up] Huge Losses Caused By Epidemic of ‘Pig Butchering’ Scams

Investigative reporter Brian Krebs reported today that U.S. state and federal investigators are being inundated with reports from people who’ve lost hundreds of thousands or millions of ...