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

Lazarus Group Uses New Technique to Avoid Detection

North Korea’s Lazarus group is using an interesting method to evade security measures, according to researchers at Malwarebytes. The threat actor is sending phishing emails with malicious ...

Evil Corp Tries to Work Around U.S. Treasury Sanctions Using Hades Ransomware

The cybercriminal group linked to over $100 Million in financial damages has pivoted their execution strategy to bypass sanctions that prevent U.S. companies from paying them ransom.

New Ransomware Task Force Shares Actions To Disrupt Ransomware Cyber Crime

The Ransomware Task Force, a public-party coalition of more than 50 experts, has shared a framework of actions to disrupt the ransomware business model.

Phishing Campaign Abuses Contact Forms

Attackers are abusing websites’ contact forms to send malicious emails to the websites’ owners, according to researchers at Microsoft. The emails contain bogus copyright claims with a ...

Mobile is a Problem: 97% of Organizations Experienced Mobile Attacks in 2020

Everything from applications, social apps, OS vulnerabilities and even mobile device management acted as initial attack vectors troubling nearly every single organization globally.

Cybercriminals Use Job-Specific Social Media Platforms to Target UK Citizens With Fake Accounts

At least 10,000 UK citizens have been targeted by nation-state actors via fake LinkedIn accounts over the past five years, the BBC reports. Ken McCallum, Director-General of MI5, said ...

Phishing Tactics Help Legitimate Pension Fund to Secure Meetings with Prospective Customers

Security researchers uncover a marketing campaign that takes a page from the cybercriminal phishing handbook to “trick” pensioners to have an introductory call with their fund expert.

The Darkside Ransomware Group Is the Dangerous Poster Child for Today’s Ransomware-as-a-Service

Looking beyond the “older” RaaS threat groups like Ryuk, DoppelPaymer, and Revil, today’s modern ransomware-as-a-service operator is far more business-like and specific in execution.

A Legitimate Charity Prompts Scam Imitators

Scammers are impersonating philanthropist Mackenzie Scott, the billionaire ex-wife of Jeff Bezos, the New York Times reports. Scott prefers to give money directly and contacts charities ...

FBI Obtains Authorization to Access US Servers to Remove Webshells Due to Exchange Vulnerability

Your server could have been compromised and the FBI was trying to mitigate the issue without you even knowing it yet.