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

Users Clicking on Multiple Mobile Phishing Links Increases 637% in Just Two Years

Mar 23, 2023 8:13:58 AM By Stu Sjouwerman

New data shows that phishing mobile devices as an attack vector is growing in popularity – mostly because it’s increasingly working... in exponential terms.

Cyber Insurers Quietly Remove Coverage for Social Engineering and Fraudulent Instruction Claims

Mar 23, 2023 8:13:56 AM By Stu Sjouwerman

As cyber insurers become more experienced in what kinds of claims are being presented, and the threat action details therein, specific types of coverages are no longer being included.

Half of Organizations Report at Least Monthly Outages from Cyberattacks

Mar 23, 2023 8:13:51 AM By Stu Sjouwerman

New data on the current state of cybersecurity shows that organizations are experiencing challenges, falling behind, and seeing the impact of all this post-attack.

Facebook and Microsoft Top the List of Most Impersonated Brands in 2022

Mar 23, 2023 8:13:49 AM By Stu Sjouwerman

As scammers continue to see massive returns on their phishing attacks, the use of impersonation with well-known brands continues to circle around the dominant players.

When a USB Flash Drive is Actually a Bomb

Mar 22, 2023 9:52:30 AM By Stu Sjouwerman

A journalist based in Ecuador recently used a USB flash drive that was actually a legitimate bomb.

Identifying AI-Enabled Phishing

Mar 22, 2023 9:52:28 AM By Stu Sjouwerman

Users need to adapt to an evolving threat landscape in which attackers can use AI tools like ChatGPT to craft extremely convincing phishing emails, according to Matthew Tyson at CSO.

An Overview of Silicon Valley Bank Themed Social Engineering

Mar 21, 2023 10:21:00 AM By Stu Sjouwerman

Researchers at ReliaQuest warn that organizations should continue to be on the lookout for social engineering attacks related to Silicon Valley Bank (SVB).

CyberheistNews Vol 13 #12 [Heads Up] This Week's New SVB Meltdown Social Engineering Attacks

Mar 21, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #12 | March 21st, 2023 [Heads Up] This Week's New SVB Meltdown Social Engineering Attacks On Saturday March 11, I warned about the coming wave of phishing attacks ...

[Eye Popper] The AI Genie Has Escaped: Stanford copied ChatGPT for a few hundred bucks

Mar 20, 2023 10:52:53 AM By Stu Sjouwerman

Yikes. Loz Blain at NewAtlas just reported that Stanford has copied the ChatGPT AI for less than $600. The article started out with: "Stanford's Alpaca AI performs similarly to the ...

Report Shows Business Email Compromise (BEC) Attacks Increase and Phishing Used as Initial Attack Vector in the Last Year

Mar 20, 2023 10:08:42 AM By Stu Sjouwerman

Secureworks has published a report looking at cybercrime over the course of 2022, finding that business email compromise (BEC) attacks nearly doubled last year. Additionally, attacks in ...

Warning Customers About Social Engineering.

Mar 18, 2023 1:58:48 PM By Stu Sjouwerman

It’s a familiar story: scam artists impersonate a trusted brand, a trusted business or a trusted authority in emails and on bogus sites designed to exploit that very trust to commit ...

Phishing Attacks Top List of Initial Access Vectors with Backdoor Deployment as Top Objective

Mar 17, 2023 2:19:15 PM By Stu Sjouwerman

New data looking back at the cyber attacks observed in 2022 shows that phishing continues to dominate as initial access brokers seem to be growing their business using backdoors.

92% of Organizations Have Fallen Victim to Phishing as Nearly Every Org is Concerned with Email Security

Mar 17, 2023 2:19:05 PM By Stu Sjouwerman

New data shows that not only has just about every organization experienced a successful phishing attack, but that they are also paying the price in a number of impactful ways.

[FREE RESOURCE KIT] New Phishing Security Resource Kit Now Available!

Mar 16, 2023 9:06:29 AM By Stu Sjouwerman

Phishing emails increase in volume every month and every year, so we created this free resource kit to help you defend against attacks. Request your kit now to learn phishing mitigation ...

A 240% Rise in Dynamic Phishing

Mar 16, 2023 8:44:16 AM By Stu Sjouwerman

Attackers are increasingly using techniques to prevent their phishing pages from being detected by security firms, a new report from BlueVoyant has found. The report found that in 2022 ...

Three-Quarters of Organizations Have Experienced an Increase in Email-Based Threats

Mar 15, 2023 1:43:42 PM By Stu Sjouwerman

New data on the state of email security shows that nearly every organization has been the target of a phishing attack as attacks increase in sophistication.

79% of Employee-Reported Phishing Emails Go Completely Undetected by Cybersecurity Solutions

Mar 15, 2023 1:43:39 PM By Stu Sjouwerman

As cybercriminals increasingly turn to malwareless phishing attacks, the ability for security solutions to correctly identify a malicious email is becoming more and more difficult.

University of Sydney Gives Students and Staff Advice on Avoiding Social Engineering Scams

Mar 15, 2023 9:25:51 AM By Stu Sjouwerman

The University of Sydney has issued advice to help students and staff avoid falling for social engineering attacks.

Season 5 of ‘The Inside Man’ From KnowBe4 Is Less Than a Month Away!

Mar 15, 2023 8:00:00 AM By Stu Sjouwerman

We’re thrilled to announce that Season 5 of the award-winning Knowbe4 Original Series - “The Inside Man” is less than a month away!

Newest FBI Report Shows $10B in Losses Last Year Due to Internet Scams

Mar 14, 2023 2:15:30 PM By Stu Sjouwerman

The 2022 Internet Crime Report by the FBI reported at least $10.3 billion in losses due to internet scams last year.

Security Awareness Training Blog

View Topics