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

Ryuk Ransomware Takes a Single Victim for $34 Million in Ransom

A new report from Security Researcher Vitali Kremez puts the spotlight on exactly how the group behind Ryuk ransomware is successful in infecting and obtaining payment from its victims.

Threat Actors Use Fake Sites for Espionage

Researchers at Volexity report that the Vietnamese threat actor OceanLotus has been using phony news and bogus activist websites to track users, or to trick them into downloading malware. ...

Fake Microsoft Teams Updates to Infect Systems

According to Bleeping Computer, ransomware operators are using malicious fake ads for Microsoft Teams updates to infect systems. The infection would deploy Cobalt Strike to compromise the ...

Malicious Macros Remain Highly Effective

Microsoft Office documents with malicious macros are still one of the top choices for attackers of all skill levels, according to Craig Williams from Cisco Talos. On the CyberWire’s ...

Cybercriminals Target Brazilian Government in a Ransomware Attack

The bad guys managed to fully encrypt Brazil's Superior Court of Justice (SCJ), Ministry of Health, and Government of the DF this week. Technicians from SCJ discovered that there was a ...

Unfortunate Learning Lessons from Clicking on a Suspicious Phishing Email

Israeli news source YNet released a story about a woman who clicked on a suspicious phishing link, was fired from her job, and was accused of fraud with a criminal indictment.

Phishing Links Sent Via Legitimate Google Drive Notifications

Scammers are abusing a Google Drive feature to send phishing links in automated email notifications from Google, WIRED reports. By mentioning a Google user in a Drive document, the ...

Cannabis Company GrowDiaries Suffers Data Breach of 3.4 Million Users

A recent report from SiliconANGLE released information that cannabis company GrowDiaries suffered a data breach with details of 3.4 million users being exposed online.

Thinking Skeptically About Smishing

Organizations need to train their employees to be on the lookout for SMS phishing (smishing), according to Jennifer Bosavage at Dark Reading. Bosavage explains that attackers exploit ...

[On-Demand Webinar] Top 5 IT Security Myths Your CISO Believes Are True… BUSTED!

Facts are facts, but what happens when IT security pros take myths at face value?