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 Attacks in 2021 Have Increased Nearly Three-fold in the First Half of the Year

New data analyzed by NCC Group’s Research Intelligence and Fusion Team highlights a massive uptick in the number of ransomware attacks, further establishing it as the number one security ...

Your KnowBe4 Fresh Content Updates from August

With 18 new pieces of training content added this month, check out the always fresh content update highlights and new features from the month of August.

BEC and the Underworld's Resources

Researchers at Intel 471 have observed cybercriminals outsourcing talent for business email compromise (BEC) attacks. This tactic lowers the bar of entry for BEC attacks, which are ...

Large Phishing Campaign Abuses Open Redirects

Researchers at Microsoft have observed a widespread phishing campaign that’s abusing open redirectors to fool users into visiting credential-harvesting pages. Open redirects are often ...

U.K. Organizations See Double the Number of Ransomware Attacks in the First Half of 2021

New analysis of ransomware incidents reported to the UK's Information Commissioner's Office (ICO) in the first half of 2021 show a massive rise when compared to 2020.

Cryptominers are Tricked out of Cryptocurrency Using Phishing Scams Involving the Purchase of Mining Equipment

The leveraging of Google Docs, a spoofed website, a realistic-feeling buying process, and asking for payment in cryptocurrency is all it takes to separate victims from thousands of ...

Cybercriminals Can Post Jobs on LinkedIn Posing as Any Employer They Want

Lax verification around what company is offering a given job on LinkedIn allows attackers to create bogus job postings for malicious purposes.

A COVID-19 Phishing Caper

A new phishing campaign is exploiting the ongoing uncertainty about company policies related to COVID-19, according to Roger Kay at INKY. The campaign uses emails that purport to come ...

A Look at a Ransomware Affiliate

The US Federal Bureau of Investigation (FBI) has issued an advisory describing a ransomware affiliate that calls itself “OnePercent Group,” the Record reports. The Record notes that the ...