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

Hacking Your Digital Identity: How Cybercriminals Can and Will Get Around Your Authentication Methods

Sep 8, 2023 8:00:00 AM By Stu Sjouwerman

Inadequate authentication measures leave your digital identity vulnerable to cybercriminals. Tools like multi-factor authentication, biometrics, passwords, PINs and tokens are more ...

Scary New IT Admin Attack Exposes Your MFA Weakness

Sep 7, 2023 8:44:27 AM By Stu Sjouwerman

Identity and authentication management provider Okta has warned of social engineering attacks that are targeting IT workers in an attempt to gain administrative privileges within ...

CISA Says to Exercise Caution For Disaster-Related Malicious Scams

Sep 6, 2023 9:45:36 AM By Stu Sjouwerman

The US Cybersecurity and Infrastructure Security Agency (CISA) has warned that scammers are exploiting the recent hurricanes that have hit the US. Criminals frequently impersonate ...

CyberheistNews Vol 13 #36 [Must Know] Top 10 Trends in Business Email Compromise for 2023

Sep 6, 2023 9:00:00 AM By Stu Sjouwerman

Nearly One-Quarter of Financial-Themed Spam Emails are Phishing Attacks

Sep 1, 2023 10:23:14 AM By Stu Sjouwerman

While spam tends to be dismissed as being more of an annoyance, new research shows that there is a very real and ever-present threat in emails that are marked as “spam”.

Cyberattacks Targeting Government Agencies and Institutions Increases in Q2 by 40%

Sep 1, 2023 10:22:53 AM By Stu Sjouwerman

New data shows a massive uptick in attacks across all industries, but a particularly worrisome growth in interest in targeting the public sector – and the indicators of who’s responsible ...

New “Early Warning” System in the U.K. Tips Off Ransomware Targets

Sep 1, 2023 10:21:59 AM By Stu Sjouwerman

British Intelligence has come up with a potentially very effective means to disrupt ransomware attacks, but there seems to still be a few kinks in the system.

New Adversary in the Middle Platform Circumvents MFA Protections “At Scale”

Sep 1, 2023 10:21:34 AM By Stu Sjouwerman

As Phishing as a Service (PhaaS) kits continue to evolve, news like recent attacks using the Greatness toolkit demonstrate how easy it is for novice attackers to access accounts despite ...

You Asked and Here It Is! KnowBe4's New Content Manager Feature is Unveiled

Sep 1, 2023 8:00:00 AM By Stu Sjouwerman

We heard you, and we're thrilled to tell you about the all-new Content Manager feature for KMSAT!

Labor Day Alert: Mobile Phishing Attacks on the Rise for Remote Employees

Aug 31, 2023 1:59:58 PM By Stu Sjouwerman

A recent survey by Lookout, Inc. warns for a specific attack vector as Labor Day approaches. The study shows that 85% of enterprise employees capable of remote work plan to do so on ...

[Live Demo] Ridiculously Easy Security Awareness Training and Phishing

Aug 31, 2023 12:18:44 PM By Stu Sjouwerman

Old-school awareness training does not hack it anymore. Your email filters have an average 7-10% failure rate; you need a strong human firewall as your last line of defense.

Customers of Cryptocurrency FTX are Target of Phishing Emails

Aug 31, 2023 11:06:04 AM By Stu Sjouwerman

Customers of the bankrupt cryptocurrency exchange FTX are already receiving phishing emails following a breach of personal data held by several crypto companies, CoinDesk reports.

Open Redirect Flaws: The Newest Phishing Trick

Aug 30, 2023 3:45:49 PM By Stu Sjouwerman

No surprise: phishing attacks are on the rise, and an old technique is now--again--getting increasingly popular: open redirect flaws. These flaws allow attackers to redirect victims to ...

Asking Claude AI For a Little Encryption Help... :-(

Aug 30, 2023 10:06:44 AM By Stu Sjouwerman

A friend sent me this:

Quishing: QR Codes as Phishbait

Aug 30, 2023 9:12:55 AM By Stu Sjouwerman

Researchers at Trustwave are tracking an increase in the use of QR codes to spread phishing links.

CyberheistNews Vol 13 #35 New KnowBe4 Callback Phishing Feature Boosts Your Users' Security Awareness

Aug 29, 2023 9:00:00 AM By Stu Sjouwerman

Case Study: LoanLogics Combined Compliance & Security Awareness Training to Improve Security Culture

Aug 29, 2023 8:58:39 AM By Stu Sjouwerman

In the drive to build a strong security culture, security awareness and compliance training should work hand in hand.

Top 10 Trends in Business Email Compromise for 2023

Aug 28, 2023 8:46:11 AM By Stu Sjouwerman

Researchers at Trustwave have published a report outlining trends in business email compromise (BEC) attacks, finding that these attacks spiked in February of 2023.

Use KnowBe4’s New Callback Phishing Feature to Boost Your Organization's Security Awareness

Aug 25, 2023 8:20:17 AM By Stu Sjouwerman

What's the Deal with Callback Phishing?

Your KnowBe4 Fresh Content Updates from August 2023

Aug 25, 2023 8:00:00 AM By Stu Sjouwerman

Check out the 21 new pieces of training content added in August, alongside the always fresh content update highlights, events and new features.

Security Awareness Training Blog

View Topics