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 Summit - Mitigation, Forensics and Eye-opening Phishing Research

Looks like things are getting crazier by the month, right? The recent Twitter attack shows that all organizations are susceptible to social engineering attacks. Unfortunately, very few ...

Conversations with a Phisher

Phishing campaigns display varying levels of sophistication depending on how much time and effort the attackers are willing to invest in a particular target, according to Steven Murdoch, ...

[Heads Up] DarkSide: Sophisticated New Customized Ransomware Strain Demands Millions Of Dollars

Breaking News: A new ransomware operation named DarkSide began attacking organizations earlier this month with customized attacks that have already earned them million-dollar payouts. But ...

Ukrainian Gang Responsible for Laundering More Than $42 Million Arrested as Part of Operation “Bulletproof Exchanger”

A group of cybercriminals responsible for helping ransomware gangs convert their cryptocurrency into cash were arrested in June, according to new details released this week.

New Vishing Scam Targets Diners at London’s Prestigious Ritz Hotel

Aimed at stealing credit card details from restaurant patrons, this new scam feels like it’s something we’re going to hear about a lot more.

The Most Effective Attacks Are Often the Simplest

The recent Twitter hack shows that devastating security breaches don’t always involve sophisticated actors or methods, according to Rachel Tobac, CEO of SocialProof Security. On the ...

Your Vishing Attack Surface Has Exploded And Voice Phishers Now Target Your Corporate VPN

Brian Krebs wrote: "The COVID-19 epidemic has brought a wave of email phishing attacks that try to trick work-at-home employees into giving away credentials needed to remotely access ...

KnowBe4 Launches New Research Arm With Its First Report on Security Culture

At KnowBe4, we’ve had some exciting news on the horizon for some time now that we’re thrilled to share with you – we’ve created a new research arm called KnowBe4 Research. When we ...

Social Media Doppelgangers Strike Again

Most people would be surprised by how easy it is to scam people online using duplicate versions of public accounts, according to Jake Moore, a security specialist at ESET. Moore describes ...

U.K. National Health Service Targeted with Over 40,000 Email Scams Aimed at Stealing Patient Data

The last few months have been very busy for cyber attackers targeting the NHS, as the number of phishing emails reported within the NHS shows a continual barrage of attacks.