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

[Mastering Minds] China's Cognitive Warfare Ambitions Are Social Engineering At Scale

May 26, 2023 1:40:02 PM By Stu Sjouwerman

As the world continues to evolve, so does the nature of warfare. China's People's Liberation Army (PLA) is increasingly focused on "Cognitive Warfare," a term referring to artificial ...

Your KnowBe4 Fresh Content Updates from May 2023

May 26, 2023 8:00:00 AM By Stu Sjouwerman

Check out the 20 new pieces of training content added in May, alongside the always fresh content update highlights, events and new features.

Verizon Sends New Smishing Warning

May 25, 2023 2:38:23 PM By Stu Sjouwerman

Verizon has renewed its warnings to customers about the threat of smishing, a social engineering approach that relies upon texts as opposed to other communication channels like the email ...

[SEG Headache] More Than Half of Cybersecurity Leaders Say That Too Many Phishing Attacks Get Through

May 25, 2023 6:52:59 AM By Stu Sjouwerman

Egress, a cybersecurity company that provides intelligent email security, recently released their Email Security Risk Report 2023.

Financial Fraud Phishing Attacks Increase 72% In One Year; Financial Industry Takes the Brunt

May 24, 2023 8:52:51 AM By Stu Sjouwerman

With attackers knowing financial fraud-based phishing attacks are best suited for the one industry where the money is, this massive spike in attacks should both surprise you and not ...

BatLoader Malware is Now Distributed in Drive-By Attacks

May 24, 2023 8:52:37 AM By Stu Sjouwerman

Malign persuasion can take many forms. We tend to hear the most about phishing (malicious emails) or smishing (malicious texts). Other threats are also worth some attention, like the risk ...

More Than Half of all Email-Based Cyberattacks Bypass Legacy Security Filters

May 24, 2023 8:52:19 AM By Stu Sjouwerman

New data shows that changes in cybercriminals’ phishing techniques are improving their game, making it easier to make their way into a potential victim user’s inbox.

[Hands-On Defense] Unpatched Software Causes 33% of Successful Attacks

May 23, 2023 9:55:26 AM By Stu Sjouwerman

As you all know, KnowBe4 frequently promotes security awareness training and we also mention that unpatched software is a distant number two issue after social engineering.

CyberheistNews Vol 13 #21 [Double Trouble] 78% of Ransomware Victims Face Multiple Extortions in Scary Trend

May 23, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #21 | May 23rd, 2023 [Double Trouble] 78% of Ransomware Victims Face Multiple Extortions in Scary Trend New data sheds light on how likely your organization will ...

[Microsoft Warning] A 38% Spike In Business Email Compromise with new Cybercrime-as-a-Service

May 23, 2023 8:50:06 AM By Stu Sjouwerman

Microsoft has observed a thirty-eight percent increase in cybercrime-as-a-service (CaaS) offerings for launching business email compromise (BEC) attacks between 2019 and 2022.

AI-generated Disinformation Dipped The Markets Yesterday

May 23, 2023 6:52:11 AM By Stu Sjouwerman

The Insider reported that an apparently AI-generated photo faking an explosion near the Pentagon in D.C. went viral. The Arlington Police Department confirmed that the image and ...

[New & Improved] QR Code Phishing with Snail Mail Postcards

May 22, 2023 2:25:51 PM By Stu Sjouwerman

One of KnowBe4's long-term employees just send me a picture this morning of a postcard that sure looks like it's phishing, the good old-fashioned way: snail mail ! Here is the picture and ...

[Free Tool] Find out who falls victim to QR code phishing attacks with our QR Code Phishing Security Test

May 22, 2023 11:00:00 AM By Stu Sjouwerman

According to QRTIGER, an online QR code generator company, dynamic QR code scans increased 433% globally from 2021 to 2022. In 2022, the FBI released a warning that QR codes may be ...

New Top-Level Domains as Potential Phishing Risk

May 22, 2023 10:25:18 AM By Stu Sjouwerman

Google has recently introduced a set of new top-level domains: .dad, .esq, .prof, .phd, .nexus, .foo, .zip and .mov. They’re now available for purchase, and it’s the last two that are ...

Phishing Tops the List Globally as Both Initial Attack Vector and as part of Cyberattacks

May 18, 2023 4:22:37 PM By Stu Sjouwerman

A new report covering 13 global markets highlights phishing prevalence and its role in cyber attacks when compared to other types of attacks.

New “Greatness” Phishing-as-a-Service Tool Aids in Attacks Against Microsoft 365 Customers

May 18, 2023 4:22:33 PM By Stu Sjouwerman

This new phishing toolkit is rising in popularity for its effective realism in impersonating not just Microsoft 365, but the victim organization as well.

Large-Scale "Catphishing" that Targets Victims Looking for Love

May 18, 2023 10:40:39 AM By Stu Sjouwerman

For all the recent focus on artificial intelligence and its potential for deepfake impostures, the boiler room is still very much active in the criminal underworld.  WIRED describes the ...

KnowBe4 Celebrates Success of 60,000-Customer Milestone

May 16, 2023 1:20:03 PM By Stu Sjouwerman

We are thrilled to announce we have reached a milestone of 60,000 customer organizations globally, consisting of tens of millions of end users.

The Number of Phishing Attacks Continues to Grow at a Rate of 150% Per Year

May 16, 2023 1:08:10 PM By Stu Sjouwerman

The latest Phishing Activity Trends Report from the Anti-Phishing Working Group (APWG) shows an unrelenting upward trend in the number of phishing attacks per quarter.

CyberheistNews Vol 13 #20 [Foot in the Door] The Q1 2023's Top-Clicked Phishing Scams | INFOGRAPHIC

May 16, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #20 | May 16th, 2023 [Foot in the Door] The Q1 2023's Top-Clicked Phishing Scams | INFOGRAPHIC KnowBe4's latest reports on top-clicked phishing email subjects have ...

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