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

Ransomware Data Theft Extortion Goes up 40% to 70% From ‘21 to ’22

A report from Palo Alto Networks’ Unit 42 found that data theft extortion occurred in 70% of ransomware attacks in 2022, compared to 40% in 2021. The researchers examined the four most ...

Users Clicking on Multiple Mobile Phishing Links Increases 637% in Just Two Years

New data shows that phishing mobile devices as an attack vector is growing in popularity – mostly because it’s increasingly working... in exponential terms.

Cyber Insurers Quietly Remove Coverage for Social Engineering and Fraudulent Instruction Claims

As cyber insurers become more experienced in what kinds of claims are being presented, and the threat action details therein, specific types of coverages are no longer being included.

Half of Organizations Report at Least Monthly Outages from Cyberattacks

New data on the current state of cybersecurity shows that organizations are experiencing challenges, falling behind, and seeing the impact of all this post-attack.

Facebook and Microsoft Top the List of Most Impersonated Brands in 2022

As scammers continue to see massive returns on their phishing attacks, the use of impersonation with well-known brands continues to circle around the dominant players.

When a USB Flash Drive is Actually a Bomb

A journalist based in Ecuador recently used a USB flash drive that was actually a legitimate bomb.

Identifying AI-Enabled Phishing

Users need to adapt to an evolving threat landscape in which attackers can use AI tools like ChatGPT to craft extremely convincing phishing emails, according to Matthew Tyson at CSO.

An Overview of Silicon Valley Bank Themed Social Engineering

Researchers at ReliaQuest warn that organizations should continue to be on the lookout for social engineering attacks related to Silicon Valley Bank (SVB).

CyberheistNews Vol 13 #12 [Heads Up] This Week's New SVB Meltdown Social Engineering Attacks

CyberheistNews Vol 13 #12 | March 21st, 2023 [Heads Up] This Week's New SVB Meltdown Social Engineering Attacks On Saturday March 11, I warned about the coming wave of phishing attacks ...

[Eye Popper] The AI Genie Has Escaped: Stanford copied ChatGPT for a few hundred bucks

Yikes. Loz Blain at NewAtlas just reported that Stanford has copied the ChatGPT AI for less than $600. The article started out with: "Stanford's Alpaca AI performs similarly to the ...