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

Phishing and Impersonated Brands

Microsoft is still the most impersonated brand for phishing campaigns, according to researchers at Vade Secure. The security firm spotted 30,621 unique Microsoft-related phishing URLs in ...

A Ransomware Victim Refuses to Pay

Video game studio CD Projekt Red, makers of The Witcher series and Cyberpunk 2077, have disclosed a ransomware attack, WIRED reports. The attackers claimed to have stolen source code for ...

New Novel Campaign Targeting Security Researchers Uses Really Creative Social Engineering to Fool Victims

Pretending to be security researchers themselves, this group of cybercriminals went to great lengths to make sure legitimate security researchers would fall for the attack.

New Phishing Scam Uses Fake PPP Loans to Trick Victims into Giving Up Personal Information

Taking advantage of people’s need for financial assistance, these scammers pose as a bank offering “forgivable business loans to individuals impacted by the pandemic.”

Dutch Intelligence Agencies Warn About Chinese and Russian Cyber Espionage

Chinese and Russian state hackers threaten the Dutch economy. Three Dutch intelligence agencies jointly sound the alarm about digital espionage in financial newspaper Het Financieele ...

[Heads Up] Growing Collaboration Among Criminal Groups Heightens Ransomware Triple Threat

Increased communication and collaboration among cybercrime groups is heightening the ransomware threat for the healthcare sector, according to the Cyber Threat Intelligence League (CTI ...

[Scary?] AI Can Now Learn To Manipulate Human Behavior

The Conversation just published something I have been worried about for a while now. Scary? Could be getting that way sometime soon. They said: "Artificial intelligence (AI) is learning ...

Phishing for Love

Valentine’s Day-themed phishing campaigns are spiking, researchers at Check Point warn. There was a 29% increase in Valentine’s Day-related phishing domains last month, compared to a 6% ...

[New E-Book] Comprehensive Anti-Phishing Guide

Spear phishing emails remain a top attack vector for the bad guys, yet most companies still don’t have an effective strategy to stop them.

[HEADS UP] NHS Issues Warning as UK COVID-19 Vaccine Scams Are Still Running Rampant

The National Health Service (NHS) in the UK recently sent a warning that cybercriminals are using social engineering tactics to target people wanting a COVID-19 vaccine email that is ...