Stu Sjouwerman

Chief Executive Officer & President

Stu Sjouwerman (pronounced “shower-man”) is the founder and CEO 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.

Books

Cyberheist E-Book

Find all of Stu's books on Amazon

[HEADS UP] Russian Hacker Group Launches New Spear Phishing Campaign with Targets in US and Europe

Feb 16, 2023 9:17:56 AM By Stu Sjouwerman

The Russian-based hacking group Seaborgium is at it again with increased spear phishing attacks targeting US and European countries in the last year.

[INFOGRAPHIC] 9 Cognitive Biases Hackers Exploit the Most

Feb 15, 2023 10:18:50 AM By Stu Sjouwerman

Cybersecurity is not just a technological challenge, but increasingly a social and behavioral one.

New Survey Reveals Employees are the Attack Surface

Feb 15, 2023 9:18:35 AM By Stu Sjouwerman

A survey by Tanium has found that IT security professionals in the UK say that 64% of avoidable cyber attacks are due to human error, which usually involves falling for phishing attacks. ...

Reddit is the Latest Victim of a Spear Phishing Attack Resulting in a Data Breach

Feb 15, 2023 8:18:20 AM By Stu Sjouwerman

There is a lot to learn from Reddit's recent data breach, which was the result of an employee falling for a “sophisticated and highly-targeted” spear phishing attack.

FTC: Romance Scams Cost U.S. Victims a Total of $1.3 Billion

Feb 15, 2023 8:11:41 AM By Stu Sjouwerman

Seemingly repeating the previous year, the FTC’s latest report highlights that nearly 70,000 people reported being the victim of a romance scam last year.

Deepfake Crackdown After 4Chan Users Make Celebrity Voices Say Racist, Transphobic, and Violent Things

Feb 15, 2023 8:08:06 AM By Stu Sjouwerman

As deepfake technology continues to improve, creators of deepfake technology seek to lock down and safeguard the use of their technology after inappropriate use shows up on the web.

Cybercriminals are Using Geotargeted Phishing to Target Victims

Feb 14, 2023 9:06:54 AM By Stu Sjouwerman

Attackers are abusing a legitimate service called “GeoTargetly” to launch localized phishing attacks, according to Jeremy Fuchs at Avanan. GeoTargetly is meant to be used by advertisers ...

CyberheistNews Vol 13 #07 [Scam of the Week] The Turkey-Syria Earthquake

Feb 14, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #07 | February 14th, 2023 [Scam of the Week] The Turkey-Syria Earthquake Just when you think they cannot sink any lower, criminal internet scum is now exploiting the ...

Spear Phishing Attacks Increase 127% as Use of Impersonation Skyrockets

Feb 9, 2023 8:51:35 AM By Stu Sjouwerman

Impersonation of users, domains, and brands is on the rise, as is the use of malicious links, in response to security vendors improving their ability to detect malicious attachments.

U.K. Citizens See 82% Increase in Advanced Fee Scams in the Last Year

Feb 9, 2023 8:51:29 AM By Stu Sjouwerman

In the wake of the rising cost of living, new scams targeting those in less-than-optimal financial situations based on “deprived” areas throughout the country.

Hackers Work Around ChatGPT Malicious Content Restrictions to Create Phishing Email Content

Feb 9, 2023 8:51:21 AM By Stu Sjouwerman

Active discussions in hacker forums on the dark web showcase how using a mixture of the Open AI API and automated bot from the Telegram messenger platform can create malicious emails.

Be Wary of Survey Scams

Feb 8, 2023 9:00:43 AM By Stu Sjouwerman

Online surveys are too often scams designed to steal personal or financial information, warns Phil Muncaster at ESET. Muncaster explains that these surveys are usually distributed via ...

[HEADS UP] If You're a Fan of 'The Last of Us' You May be Targeted for These Campaigns

Feb 8, 2023 9:00:40 AM By Stu Sjouwerman

The success of the TV adaption of this PlayStation game 'The Last of Us' has been a huge hit for fans. Unfortunately, this new series has attracted bad actors to exploit for their own ...

[Scam Of The Week] The Turkey-Syria Earthquake

Feb 7, 2023 9:51:32 AM By Stu Sjouwerman

Just when you think they cannot sink any lower, criminal internet scum is now exploiting the recent earthquake in Turkey and Syria.

CyberheistNews Vol 13 #06 [Eye Opener] Russian and Iranian Spear Phishing Campaigns Are Running Rampant in the U.K.

Feb 7, 2023 9:00:00 AM By Stu Sjouwerman

Thinking Critically About Your Online Behavior

Feb 7, 2023 8:45:03 AM By Stu Sjouwerman

Employees need to adjust their mindsets in order to defend themselves against social engineering attacks, according to Jonathon Watson at Clio. In an article for Dark Reading, Watson ...

[New Feature] Immediately Add User-Reported Email Threats to Your Microsoft 365 Blocklist from Your PhishER Console

Feb 7, 2023 8:00:00 AM By Stu Sjouwerman

Now there’s a super easy way to keep malicious emails away from your users through the power of the KnowBe4 PhishER platform!

Students Phished with Bogus Job Offers

Feb 6, 2023 10:14:44 AM By Stu Sjouwerman

A phishing campaign is targeting college students with phony part-time job opportunities, according to Jeremy Fuchs at Avanan. The emails purport to come from the colleges’ job placement ...

Your KnowBe4 Fresh Content Updates from January 2023

Feb 3, 2023 8:52:14 AM By Stu Sjouwerman

Check out the 39 new pieces of training content added in January, alongside the always fresh content update highlights, events and new features.

Yahoo Suddenly Rises in Popularity in Q4 to Become the Most Impersonated Brand in Phishing Attacks

Feb 2, 2023 4:31:58 PM By Stu Sjouwerman

Completely absent from the top 10 brands for more than two years, Yahoo’s impersonation may indicate that scammers are looking for new attack angles using lesser-used brands.

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