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

Australian Beverage Manufacturer Shutdown IT Systems After Cyberattack

A cyberattack forced Australian beverage manufacturer Lion to shut down its IT system, interrupting manufacturing and orders, the company disclosed on June 9.

Japan CERT: 75% of BEC Email Scams Involve the Forgery of an Invoice from a Business Partner

New research from the Japan Computer Emergency Response Team provides needed insight into what tactics and methods are used as part of Business Email Compromise scams.

Multifactor Authentication Versus Credential Stuffing?

You shouldn’t assume multi-factor authentication will protect your accounts from credential stuffing attacks, according to Gerhard Giese at Akamai. Credential stuffing is a type of ...

Sharp Increase Of Phishing "From" Dutch Tax Authority

The Dutch Tax Authority saw a sharp increase in reports of phishing emails and text messages made to look like they came from the Tax Authority since the start of the coronavirus crisis. ...

Maze Ransomware “Cartel” Adds More Ransomware Gangs to its Data Leak Platform

It’s one thing if you’re up against one ransomware cybercriminal group. But what happens when they start acting like the good guys and joining forces?

Pretexting Defined

Pretexting is a social engineering tactic in which an attacker attempts to gain information, access, or money by tricking a victim into trusting them, according to Josh Fruhlinger at CSO ...

[HEADS UP] Recent Phishing Attack in Germany Hits Coronavirus Task Force

An ongoing phishing attack has been targeting executives of a company working to provide the German coronavirus task force with protective gear. The company is multinational and more than ...

The Enduring Threat of Ransomware During COVID-19

Ransomware attacks continue to blight organizations of all sizes and sectors. The number of incidents involving ransomware reported to Beazley Breach Response (BBR) Services in the first ...

[EXCLUSIVE] Indian Cyber Firm Spied on Investors and Politicians Across the Globe

A little-known Indian IT firm offered its phishing services to help clients spy on more than 10,000 email accounts over a period of seven years.

Why BEC Punches Above Its Weight

Business email compromise (BEC) attacks are particularly insidious because they don’t use malware payloads or malicious URLs. That’s a reminder from Evan Reiser, CEO and co-founder of ...