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

A Closer Look at HR Scams: Does Niceness Have a Downside?

Threat actors are targeting HR employees who are looking to hire new people, according to Lisa Vaas at Contrast Security. As part of their job, HR employees frequently interact with ...

Spear Phishing Campaign Targets Former Israeli Officials

An Iranian threat actor is conducting a spear phishing operation against Israeli officials, according to researchers at Check Point. The targets have included the former Foreign Minister ...

Monkeypox Scams Continue to Increase

Attackers are taking advantage of the current news about monkeypox to trick people into clicking on malicious links, Pickr reports. Researchers at Mimecast have spotted a phishing ...

Facebook Phishing Scam Steals Millions of Credentials

Researchers at PIXM have uncovered a major Facebook Messenger phishing scam that’s “potentially impacted hundreds of millions of Facebook users.” More than eight million people have ...

Approaching Ransomware Victims Privately

Researchers at KELA warn that ransomware gangs are increasingly refraining from mentioning their victims’ names after the initial attack, giving the victims a chance to pay up before the ...

Karakurt Adds Irritating Phone Calls to its Crimes

The US Cybersecurity and Infrastructure Security Agency (CISA) and its partners have issued a joint alert on Karakurt, a data theft extortion group that harasses victims’ employees, ...

40% of CSOs say Their Organization is Not Prepared for Cyberattacks as Phishing is the Top Likely Cause of Breaches

A new survey of executives sheds light on how well organizations fared with cyberattacks in the last 12 month as well as what attack vectors are going to increase future breaches.

Old Dog, New Trick: Hackers Use Logons in URLs to Bypass Email Scanners

A new phishing method uses a decades-old special URL format to take advantage of how security solutions and email clients interpret URLs, tricking victims into clicking.

“Five Eyes” Nations Cybersecurity Authorities Issue Warning to MSPs of Stepped-Up Cyberattacks

The world’s five leading cybersecurity authorities have again issued a joint report about an increase in malicious cyber activity targeting managed service providers they expect to ...