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

Passwords are Reused 64% of the Time as the Number of Passwords to Remember Reaches Over 100

New data focusing on user cyber hygiene around password use shows users are repeatedly reusing passwords across multiple applications and environments, despite the rise in breaches.

KnowBe4's Position On Recent Russian Aggression

The unprovoked attack on the Ukrainian people, and subsequent humanitarian crisis it has caused, is an unacceptable act of aggression by the Russian state. While we do not currently ...

Up and To the Right: Ransomware Attacks Grow by 105% in 2021

New data from Sonicwall shows the numbers of nearly every type of attack growing in 2021, with concerns by organizations about attacks and their aftermath at an all-time high.

83% of all Successful Ransomware Attacks Featured Double and Triple Extortion

With 2021 being the “testing ground” for ransomware extortion, 2022 is showing signs of ransomware gangs settling in on proven extortion tactics to ensure payment.

Social Engineering a Major Factor in Cyberattack on Camera Maker Axis Communications

As details of the February attack continue to be divulged, it becomes evident that cybercriminals were able to get past both users and security controls.

Domains Associated with Phishing Directed Against Ukraine

Researchers from Secureworks’ Counter Threat Unit (CTU) are tracking phishing domains used by the “MOONSCAPE” threat actor to target users in Ukraine. The researchers note that Ukraine’s ...

Phishing Impersonation and Attack Trends in 2021

Facebook overtook Microsoft as the most impersonated brand in phishing attacks last year, according to a new report from Vade Secure.

CyberheistNews Vol 12 #10 [Heads Up] A New Phishing Attack Warns About A Suspicious Russian Login

[Heads Up] A New Phishing Attack Warns About A Suspicious Russian Login Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #10 | Mar. 8th., 2022 [Heads Up] A New Phishing ...

[World Premiere] KnowBe4’s New Season 4 of Netflix-Style Security Awareness Video Series - ‘The Inside Man’

We’re thrilled to announce the long-awaited fourth season of the award-winning KnowBe4 Original Series - ‘The Inside Man’ is now available in the KnowBe4 ModStore!

FBI: Ransomware gang breached 52 US critical infrastructure orgs

The US Federal Bureau of Investigation (FBI) says the Ragnar Locker ransomware gang has breached the networks of at least 52 organizations from multiple US critical infrastructure sectors.