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

Mark Cuban’s MetaMask wallet drained nearly $900,000 in suspected phishing attack

Dallas Mavericks owner and well-known investor Mark Cuban reportedly lost nearly $900,000 in a phishing attack targeting his MetaMask cryptocurrency wallet.

91% of Cybersecurity Professionals Have Experienced Cyber Attacks that Use AI

A new report takes an exhaustive look at how cybersecurity professionals see the current and future state of attacks, and how well vendors are keeping up.

New Phishing Attack Uses Social Engineering to Impersonate the National Danish Police

A malwareless and linkless phishing attack uses sextortion and the threat of legal action to get the attention of potential victims and get them to respond.

Hacker Deepfakes Employee's Voice in Phone Call to Breach IT Company

Last month, Retool, a business software development company, fell victim to a sophisticated cyberattack that compromised 27 of its cloud customers.

New Scam Impersonates QuickBooks to Steal Credentials, Extract Money

Establishing urgency through a false need to “upgrade” or lose services, this new attack takes advantage of the widespread use of the popular accounting app to attract victims.

Microsoft (Once Again) Tops the List of Most Impersonated Brands in 2023

Out of the over 350 brands regularly impersonated in phishing attacks, Microsoft continues to stand out because they provide attackers with one unique advantage over other brands.

Board Members' Lack of Security Awareness Puts Businesses at Risk of Cyber Attacks, Finds Savanti Report

A report from cybersecurity consultancy Savanti reveals that board members are facing challenges in understanding cyber risks, and this has important implications for businesses.

No Dice for MGM Las Vegas as It Battles Fallout from Ransomware Attack After a 10-minute Vishing Scam

DEVELOPING STORY. SCROLL DOWN FOR MORE.

MGM Suffers Ransomware Attack that Started with a Simple Helpdesk Call

As the aftermath unfolds, the details around the recent attack on MGM Resorts provides crucial insight into the attacks impact, who’s responsible, and how it started.

Can You Guess Common Phishing Themes in Southeast Asia?

Researchers at Cyfirma outline trends in phishing campaigns around the world, finding that Singapore is disproportionately targeted by phishing attacks.