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

Funds Transfer Fraud Has Increased 35% Since the Onset of COVID-19

With reported losses from thousands of dollars to well over $1 million, funds transfer fraud represents 27% of cyber insurance claims in 2020.

Business Email Compromise attacks increase 67% Leading to Fraud, Ransomware, and Data Breaches

Involved in 60% of cybersecurity insurance claims, Business Email Compromise (BEC) is growing in interest by cybercriminals as the initial malicious action as part of a larger attack.

CISA’s Advice on Countering Phishing

The US Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency (CISA) has published an advisory on best practices to thwart email-based phishing attacks. The ...

Ransomware Dominates 41% of all Cyber Insurance Claims in H1 2020

Just-released data from cyber insurer Coalition shows massive increases in both the frequency of ransomware attacks and the ransom demand with Maze and Ryuk leading the way.

Fake Alert Scams: Actually Unwanted Programs

Mobile tech support scams are on the rise, according to researchers at Sophos. These scams are similar to traditional desktop tech support scams, in that they try to frighten the user ...

The Dangerous Attraction of Original Gangsters

Users need to be mindful of the ways in which hackers can take over their accounts, according to Brian Krebs. Krebs says his experience as the owner of an “OG” Gmail address made him ...

Extradited Member of a U.K. Scammer Highlights How His Gang Took Banks for $2 Million

Details on how this global gang of cybercriminals used spoofing and impersonation methods to social engineer banks time and time again shows how effective these tactics are.

CyberheistNews Vol 10 #37 [Heads Up] How to Check Your Email Rules for Maliciousness. Do This Now.

CyberheistNews Vol 10 #37 [Heads Up] How to Check Your Email Rules for Maliciousness. Do This Now. Roger Grimes wrote: "Email rules have been used maliciously for decades. Learn about ...

Email and SMS Phishing Campaign Impersonates Lloyds Bank

A convincing phishing campaign is targeting customers of Lloyds Bank, Infosecurity Magazine reports. Law practice Griffin Law warns that more than 100 people have reported receiving ...

Legitimate Services, but still Hook, Line, and Sinker

A malware distribution campaign is abusing organizations’ contact forms to send malicious emails designed to catch the attention of companies’ customer support personnel. The attackers ...