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

FBI Finds Phishing Sites Abusing Search Results and Ads to Steal Banking Credentials

The US Federal Bureau of Investigation has sent out a private industry notification (PIN) warning that cybercriminals are using search engine ads and search results to spread phishing ...

A  New Smishing Trojan is Out and About

Researchers at Pradeo have observed a new Android malware campaign that uses text messages asking victims to pay a small fee for a delivery. The messages contain a link that will install ...

New QuickBooks-Themed Phishing Attack Seeks to Infect Victims with Dridex Malware

Purporting to be invoices and payment reminders, this new campaign targets users of the popular accounting software to install the banking trojan on its victims endpoints.

Email-Based Threats Increase 64% as Attacks Grow in Sophistication and Volume

New data from Mimecast shows how email-based threats are not only the greatest perceived concern, but are proving to be the reason for increased experienced attacks.

Phishing Scammers Remove ‘External Sender’ Email Warnings Impersonating Internal Users

With little more than some CSS and HTML coding, a security researcher demonstrates how easy it is to eliminate security warnings placed on email messages by security products.

Wine-Themed Phishing Attacks Have Turned Sour During the Pandemic

Scammers took advantage of people’s desire to order wine online during the pandemic, Decanter reports. Researchers at Recorded Future disclosed in a recent report that wine-related ...

Huge Business Email Compromise Campaign Targets More Than 120 Organizations

According to Bleeping Computer, Microsoft reported that a large business email compromise (BEC) campaign has targeted dozens of organizations. The industries targeted varied from real ...

Fake Court Order Used to Take Over Domains

Motherboard reports that a scammer used a phony court order to trick a domain registrar into giving them control over a domain that posted links to dark web drug markets. The scammer then ...

Student’s Attempt to Pirate Software Leads to Ryuk Ransomware Attack

Bleeping Computer recently reported that a student attempted to pirate expensive data visualization software, which resulted in a Ryuk ransomware attack.