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

Mac users warned that disabling all Office macros doesn’t actually disable all Office macros

Graham Cluley warned: "It’s been almost 25 years since macro malware first reared its head, and it would be nice to think that the defences Microsoft has built into its Office suite in ...

New articles and updates from the KnowBe4 Technical Content Team

Here are all of the major items and updates our Technical Content Engineers have added to our knowledge base and KMSAT product in the last couple of months.

Specially Crafted ZIP Files Used to Bypass Secure Email Gateways

Attackers are always looking for new tricks to distribute malware without them being detected by antivirus scanners and secure email gateways. This was illustrated in a new phishing ...

The Direct Deposit Phish: Revisiting the Scene of the Crime

By Eric Howes, KnowBe4 Principal Lab Researcher. Well over a year ago we reported on the rise of a new form of CEO fraud in which malicious actors persuaded unwitting employees working in ...

Here Is A New Term For Your Cybercrime Glossary: Vendor Email Compromise (VEC)

Agari’s latest Email Fraud & Identity Deception Trends report highlights the growing threat of vendor email compromise (VEC), according to SecurityWeek. This is a variety of business ...

Exactly Why Is Replying to Phishing Attacks A Really Bad Idea?

PhishLabs warns that replying to a phishing email, even if you know it’s a scam, can lead to further attacks. Most phishing campaigns are automated and replying to them puts you on a ...

The Cold War Was Like Being Hit With A Club. Cyber War is Being Stung With A Syringe

America's Cold War with Russia was fought with the threat of mutually assured destruction using atomic weapons. Being hit with a nuke is very much like being whacked over the head with a ...

APWG Q3 Report: Phishing Attacks at Highest Level in Three Years

According to the APWG’s new Phishing Activity Trends Report, the number of phishing attacks continued to rise into the autumn of 2019. The total number of phishing sites detected by APWG ...

You Need To Start Thinking Differently About This Whole "Insider Threat" Concept

In order to defend against insider threats, you need an accurate picture of the problem. The CyberWire’s Carole Theriault spoke to a number of industry experts about insider threats and ...

Ransomware Attack Blocks Hundreds Of Law Firms From Their Trial Records

I could not come up with a better scenario to get sued by a pack of angry lawyers. Reams of digital legal documents have been held hostage under a ransomware threat to TrialWorks, a ...