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

[Heads-Up] North Korean Malware Found On Indian Nuclear Plant's Network

I am not a happy camper. This is exactly why I have been insisting on security awareness training for employees at critical infrastructure organizations. This could have been a Real Life ...

Lessons Learned From Vishing Robocall Attacks In Mandarin

Among the specialized forms of vishing are those that target specific language communities. Chinese-speaking people in the US and around the world are increasingly being targeted with ...

Ransomware Attack Causes School 'District-Wide Shutdown'

A ransomware attack hitting Las Cruces Public Schools forced the district to shut down the entire computer system to contain the infection.

Vishing, from (not) the Bank

We saw yesterday how phishing affects the financial sector. Here we see another, related trend: impersonation attacks that purport to be from the victim’s bank.

[NEW FEATURE] KnowBe4 Assessments Help Gauge Proficiency of Your Users in Security Awareness and Sentiment Towards Security Culture

Social engineering attacks continue to be the leading cause of compromised networks and data breaches. Today, organizations of all sizes are susceptible to these attacks and are ...

A Recent Spate Of Spear Phishing Attacks Is Targeting The Financial Industry

Phishing attacks are getting harder to spot, especially as more attackers realize the value of targeted, well-crafted phishing attacks, according to Johannes Ullrich, the dean of research ...

Phishing Attack Targets Humanitarian Organizations

Researchers at Lookout have discovered an ongoing phishing campaign targeting humanitarian non-governmental organizations (NGOs), including UNICEF and the Red Cross. The infrastructure ...

Phishing in Office 365's Pond

Heimdal Security has come across a phishing campaign that uses compromised accounts to target Microsoft users. The attackers use email and social media accounts they’ve already breached ...

Data Breaches Devastate Small Businesses in 2019 with 10 Percent Closing Their Doors

A new report from the National Cyber Security Alliance sheds some light on how prepared small and medium size businesses are and what the aftermath of a data breach really looks like.