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

New Research Shows Social Engineering and Phishing are the Top Threats

According to the CS Hub Mid-Year Market Report 2022, new findings shows that 75% of survey respondents believe that social engineering and phishing attacks are the top threat vector to ...

Twilio hacked by phishing campaign targeting internet companies

Communications giant Twilio has confirmed hackers accessed customer data after successfully tricking employees into handing over their corporate login credentials.

WSJ: "Cyber Insurance Prices Soar"

The WSJ reported Aug 8, 2020: It is becoming more expensive and difficult for companies to get or renew cyber insurance. The price of U.S. cyber insurance policies increased by 79% from a ...

Cybercriminals Go to College with New Phishing Attacks

The summer is winding up, and the traditional academic year is approaching. And amid the welcomes from the deans of students, the activities coordinators, the academic advisors and so on, ...

LinkedIn Continues its Reign as the Most-Impersonated Brand in Phishing Attacks

As cybercriminals look for novel and effective ways to gain entrance to a victim network, LinkedIn is proving to be fruitful enough to keep the attention of phishing scammers.

Ransomware Attack Downtime Costs in the U.S. Rise to Nearly $160 Billion

New data based on tracked, publicly-confirmed ransomware attacks shows that downtime – and the associated cost – is increasing at an alarming rate as nearly half of attacks see a ransom ...

Open Redirects Exploited for Phishing

Attackers are exploiting open redirects to distribute links to credential-harvesting sites, according to Roger Kay at INKY. The attackers are exploiting vulnerable American Express and ...

On-Demand Webinar: New 2022 Phishing By Industry Benchmarking Report: How Does Your Organization Measure Up

As a security leader, you have a lot on your plate. Even as you increase your budget for sophisticated security software, your exposure to cybercrime keeps going up. IT security seems to ...

Labor Market Social Engineering: Supply-Side and Demand-Side

We’re accustomed to social engineering being used for credential theft and business email compromise. We’re also accustomed to hearing about the increase in remote work during the ...

New Data Breach Extortion Attack Begins with a Fake Duolingo or MasterClass Subscription Scam

The cybercriminal gang, dubbed ‘Luna Moth’ uses a sophisticated mix of phishing, vishing, remote support sessions, and remote access trojans to gain control of victim endpoints.