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

Valid Accounts Rank as the Top Initial Access Infection Vector, Putting a Spotlight on Credentials

As ransomware, business email compromise, and phishing attacks continue to escalate, new data sheds light on where organizations need to focus to help put a stop to attack success.

Ransomware Attacks on UK Organizations are Not Being Reported Enough, Clouding Impact

A new report from the UK’s National Cyber Security Center highlights the current state of threats in the UK, with particular focus on ransomware attacks and their impact.

Cyber Insurance Rates Begin to Stabilize as Insurers Gain Better Insight into Cyberattacks

The latest data shows that historically massive rate increases seen over the last few years are beginning to come down, primarily due to insurers having a solid understanding of the risk.

Watch Out For This Tricky New Tactic Called Clone Phishing

Researchers at Vade Secure describe a type of phishing attack dubbed “clone phishing,” in which attackers follow up a legitimate email from a trusted sender with a replica, claiming that ...

FBI director says he's 'extremely concerned' about China's ability to weaponize TikTok

Suzanne Smalley at Cyberscoop reported: "FBI Director Christopher Wray told Congress on Tuesday he is “extremely concerned” that Beijing could weaponize data collected through TikTok, the ...

[SCAM OF THE WEEK] Phishing Campaign Targets Crypto Users

Major cryptocurrency company FTX recently filed for bankruptcy, and there's a big phishing campaign on the loose targeting FTX users.

Fangxiao Domain-Spoofing for Revenue

Researchers at Cyjax describe a large phishing campaign being run by a China-based financially motivated threat actor called “Fangxiao.” The threat actor has been active since at least ...

[FREE Resource Kit] Stay Safe This Holiday Season with KnowBe4

It's the best time of the year! But also, it's the busiest time for cybercriminals. Since your users will be distracted with seasonal activities, cybercriminals will take advantage of the ...

“Hired Hand” in the Kingdom of Saudi Arabia Uses Domain Spoofing

Sometimes a social engineering campaign has a clear geographical focus, often shaped by language, holidays, or current events. In this case, the scammers are taking opportunistic ...