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

Scam Service Attempts to Bypass Multi-factor Authentication

A scam operation called “Estate” has attempted to trick nearly a hundred thousand people into handing over multi-factor authentication codes over the past year, according to Zack ...

Phishing and Pretexting Dominate Social Engineering-Related Data Breaches

New data shows that despite the massive evolution of the cybercrime economy, threat actors are sticking with the basics in social engineering attacks, with a goal at stealing data.

FBI Warns of AI-Assisted Phishing Campaigns

The US Federal Bureau of Investigation’s (FBI’s) San Francisco division warns that threat actors are increasingly using AI tools to improve their social engineering attacks.

How Come Unknown Attack Vectors are Surging in Ransomware Infections?

Trend analysis of ransomware attacks in the first quarter of this year reveals a continual increase in the number of "unknown" initial attack vectors, and I think I understand why.

Attackers Leveraging XSS To Make Phishing Emails Increasingly Evasive

Attackers are exploiting Reflected Cross-Site Scripting (XSS) flaws to bypass security filters, according to a new report from Vipre. This technique allows attackers to send benign links ...

Alert: Nova Scotians Hit by Surge of Sophisticated Spear Phishing Scams

The Royal Canadian Mounted Police (RCMP) in Nova Scotia is warning of spear phishing attacks that impersonate company managers. The scammers text company employees requesting a payment to ...

New Research: Number of Successful Ransomware Attacks Rise 29% in a Just One Year

New analysis of Q1’s ransomware attacks uncovers a single group responsible for the majority and discusses what makes them so successful.

Reality Hijacked: Deepfakes, GenAI, and the Emergent Threat of Synthetic Media

"Reality Hijacked" isn't just a title—it's a wake-up call. The advent and acceleration of GenAI is redefining our relationship with 'reality' and challenging our grip on the truth.

[Beware] Ransomware Targets Execs' Kids to Coerce Payouts

Just when you think bad actors cannot sink any lower, they find a way to. In a recent chilling evolution of ransomware tactics, attackers are now also targeting the families of corporate ...

Ransomware Detection Time Shortens by 44% as Organizations Attempt to Keep Up with Attackers

New data shows organizations are improving their ability to detect and respond to ransomware attacks, but is it fast enough to make a difference and stop attacks?