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

Ad Network Uses Advanced Malware Technique To Conceal Cryptojacking Ads

I blogged a few days ago about a method to embed a crypto-mining script in a Word doc. Turns out an ad network has done an even better job! Arstechnica wrote: "Domain-name algorithms are ...

Financial phishing accounts for over 50% of all phishing attacks for the first time

In 2017 Kaspersky Lab’s anti-phishing technologies detected over 246 million user attempts to visit different kinds of phishing pages. Of those, over 53 per cent were attempts to visit a ...

Hackers Invade German Ministries of Defense and Foreign Affairs

Foreign hackers have invaded secure networks of various German government departments. According to German and Dutch media, the Ministries of Foreign Affairs and Defense were among the ...

Organizations Are Failing To Learn From Phishing And Ransomware Attacks

Warwick Ashford, security editor at ComputerWeekly had an interesting observation after reading CyberArk's latest cyber threat report: "Organisations are failing to learn from cyber ...

Defender Comes To Aid Of Older Microsoft Windows Versions

Antivirus companies are not going to like this. Microsoft blogged that their Windows Defender Advanced Threat Protection (ATP) security service soon will be coming to Win7 and Win8.1 ...

Annabelle: The Terrifying New Ransomware Variant

A new ransomware variant called Annabelle has been discovered, which seems to have been designed to ‘show off the skills’ of the developer who created it, by being as difficult to deal ...

Which phishing messages have a near 100% click rate?

Zeljika at HelpnetSecurity had a great summary of Wombat's latest State of the Phish report: "Training employees to spot phishing emails, messages and phone calls can’t be done just once ...

The Class Action Litigation Consequences of Business Email Compromise Attacks

Sunil Shenoi, Seth Traxler and Gianni Cutri are partners at Kirkland & Ellis LLP and advise clients on a variety of data security issues, including responding to data security ...

2,000 Systems Down Due To SamSam Ransomware Infection At Colorado Department of Transportation

February 22, the attack hit CDOT’s computers, encrypted files and demanded to pay the ransom in Bitcoins. Security officials shut down more than 2,000 employee computers while they ...

Insider Trading Can Pose Cyber Security Risks Says SEC Chair Clayton

Securities and Exchange Commission Chair Jay Clayton warned today insider trading by executives from undisclosed hacks and weak protections can pose cyber security risks to the reputation ...