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

FREE Resource Kit for Ransomware Awareness Month in July

We’re here to help you and your users stay secure from the scourge of ransomware for Ransomware Awareness Month this July with a kit full of free resources!

BEC Attacks Accounted for More Than One in Ten Social Engineering Attacks in 2023

A new report from Barracuda has found that email conversation hijacking attacks have risen by 70% since 2022. Additionally, business email compromise (BEC) attacks accounted for 10.6% of ...

Vacation-Themed Scams Are Spiking

Scammers are now impersonating legitimate services like Booking.com and Kayak to target people planning their summer vacations. One out of every 33 vacation-themed domains registered last ...

Brazilian Entities Increasingly Targeted by Nation-State Phishing Attacks

Mandiant has published a report looking at cyber threats targeting Brazil, finding that more than 85% of government-backed phishing activity comes from threat actors based in China, North ...

[Heads Up] Tricky Fake Invoice Phishing Attack Uses Search to Deliver Malware

Researchers at Trustwave warn that a phishing campaign is distributing malware via HTML attachments disguised as invoices. Notably, the HTML files abuse the Windows Search protocol to ...

No Politician Too Small: School Board Candidates Targeted By Phishing and BEC Scams

Cybercriminals are broadening their targets to include even local political candidates, as an escalating series of phishing attacks was recently directed at school board candidates in ...

Microsoft and KnowBe4 Collaborate on Ribbon Phish Alert Button for Outlook

Increasing phishing attacks are a constant threat to organizations, making it crucial for users to report suspicious emails.

Unmasking the Threat: Why Phishing Scams are Surging in Japan

Japan has a large number of Forbes Global 2000 corporations--more than the UK, Germany, and France combined. Despite this economic strength, Japan faces an alarming and growing threat ...