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

Business Email Compromise and “Confidential” Mergers and Acquisitions

May 10, 2023 10:07:25 AM By Stu Sjouwerman

A newly identified criminal organization has been observed running a large number of business email compromise (BEC) scams. Since February 2021, Abnormal Security reports the gang has ...

KnowBe4 Earns 2023 Top Rated Award from TrustRadius

May 10, 2023 10:00:00 AM By Stu Sjouwerman

We are proud to announce that TrustRadius has recognized KnowBe4 with a 2023 Top Rated Award.

[Finger on the Trigger] How the FBI Nuked Russian FSB's Snake Data Theft Malware

May 9, 2023 4:43:09 PM By Stu Sjouwerman

The Five Eyes member nations' cybersecurity and intelligence agencies dismantled the infrastructure of the Snake cyber-espionage malware that was operated by Russia's Federal Security ...

Q1 2023 Top-Clicked Phishing Report [INFOGRAPHIC]

May 9, 2023 10:03:14 AM By Stu Sjouwerman

KnowBe4's latest reports on top-clicked phishing email subjects have been released for Q1 2023. We analyze 'in the wild' attacks reported via our Phish Alert Button, top subjects globally ...

More InterPlanetary File System Services Use Also Means Phishing Abuse by Cybercriminals

May 9, 2023 9:01:02 AM By Stu Sjouwerman

The InterPlanetary File System (IPFS), a distributed file-sharing system that represents an alternative to the more familiar location-based hypermedia server protocols (like HTTPS), is ...

CyberheistNews Vol 13 #19 [Watch Your Back] New Fake Chrome Update Error Attack Targets Your Users

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

CyberheistNews Vol 13 #19 | May 9th, 2023 [Watch Your Back] New Fake Chrome Update Error Attack Targets Your Users Compromised websites (legitimate sites that have been successfully ...

Dallas Police Department is the Latest Victim of a Ransomware Attack

May 9, 2023 8:00:00 AM By Stu Sjouwerman

Unfortunately ransomware attacks have taken another victim. The City of Dallas recently confirmed that their police department suffered a ransomware attack. This attack shutdown essential ...

Blocking Social Engineering by Foreign Bad Actors: The Role of the New Foreign Malign Influence Center

May 8, 2023 7:02:01 AM By Stu Sjouwerman

The U.S. government created a new office to block disinformation. The new Foreign Malign Influence Center (FMIC) oversees efforts that span U.S. military, law enforcement, intelligence, ...

[Eye Opener] HTML Phishing Attacks Surge by 100% in 12 Months

May 7, 2023 11:57:55 AM By Stu Sjouwerman

The Cyberwire reported: "Barracuda released a study this morning indicating that HTML attacks have doubled since last year.

[On-Demand] A Master Class on IT Security: Roger Grimes Teaches You Phishing Mitigation

May 5, 2023 8:35:23 AM By Stu Sjouwerman

Phishing attacks have come a long way from the spray-and-pray emails of just a few decades ago. Now they’re more targeted, more cunning and more dangerous. And this enormous security gap ...

[New Feature] Show Your C-Suite the ROI of Security Awareness Training with KnowBe4 Executive Reports

May 5, 2023 8:00:00 AM By Stu Sjouwerman

Do you spend too much time creating custom security awareness reports for your C-suite or board of directors? If so, we’re happy to share our new KMSAT feature, Executive Reports.

CNBC: Why Nearly 80% of Leaders are Increasing Cybersecurity Spend

May 4, 2023 8:53:31 AM By Stu Sjouwerman

According to a recent EY survey, nearly 80% of business leaders are increasing their cybersecurity investment in the next six to 12 months.

Response-Based Business Email Compromise Contributes to 97% of Attacks

May 4, 2023 8:39:58 AM By Stu Sjouwerman

The malwareless and seemingly benign nature of business email compromise emails, mixed with impersonation techniques, are difficult to spot as being malicious, making them even more ...

Global Cyber Attacks Continue to Rise as Q1 Sees a 7% Increase

May 4, 2023 8:39:05 AM By Stu Sjouwerman

New data highlights just how frequently cyber attacks are attempted and organizations are impacted - and the numbers are far more surprising than you’d think.

Ransomware Attacks Surge 91% in a Single Month to Reach an All-Time High

May 4, 2023 8:38:45 AM By Stu Sjouwerman

March saw a huge jump in ransomware compared to January and February, signifying that organizations should expect to see a lot more of these attacks this year.

Walmart Jumps to Top of the List of the Worlds Most Impersonated Brands Used in Phishing Attacks

May 4, 2023 8:38:24 AM By Stu Sjouwerman

Walmart’s rise to become the brand most likely to be impersonated in Q1 of this year is a real problem.

Malware Downloads Facilitated by Social Engineering

May 4, 2023 8:28:47 AM By Stu Sjouwerman

The most common route for malware infections remains social engineering in its various forms: phishing, vishing, etc. Such approaches take advantage of users’ deliberately cultivated ...

[May the 4th] How Security Awareness Training Could Have Saved the Death Star

May 4, 2023 8:05:00 AM By Stu Sjouwerman

It's May the 4th, a holiday that celebrates our love for a galaxy far, far, away - Star Wars! I can't help but share some cybersecurity learning lessons from one of my favorite Sci-Fi ...

[FREE RESOURCE KIT] New Password Security Resource Kit to Celebrate World Password Day!

May 4, 2023 8:00:00 AM By Stu Sjouwerman

It's World Password Day! This holiday is to ensure everyone always practices good password hygiene. This year, we wanted to share the best password resources with you to share with your ...

WSJ: "Merck’s Insurers On the Hook in $1.4 Billion NotPetya Attack, Court Says"

May 3, 2023 10:45:35 AM By Stu Sjouwerman

I get the WSJ Cybersecurity newsletter, which by the way is warmly recommended. Kim Nash today reported a shocker which will make everyone's insurance premiums go even further up: "Six ...

Security Awareness Training Blog

View Topics