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

1 Out of Every 34 Organizations Worldwide Have Experienced an Attempted Ransomware Attack

Nov 14, 2023 2:01:17 PM By Stu Sjouwerman

With organizations globally experiencing an increase in attempted ransomware attacks year over year, new data shows how the global average isn’t even the worst news.

[Holiday Resource Kit] The Holiday Season is Here. How Are You Staying Cyber Safe?

Nov 14, 2023 9:15:24 AM By Stu Sjouwerman

It's the busiest time of year for everyone, especially cybercriminals. They know surges in online shopping, holiday travel and time constraints can make it easier to catch users off their ...

CyberheistNews Vol 13 #46 [Heads Up] Cybersecurity Expert: AI Lends Phishing Plausibility for Bad Actors

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

AI Disinformation Exposed: A Fake "Tom Cruise" Attacks the Olympics

Nov 12, 2023 10:12:07 AM By Stu Sjouwerman

Using a page straight out of the KGB playbook, a new AI-driven disinformation attack has been unleashed. The latest victim of this disturbing trend is none other than the International ...

[INFOGRAPHIC] Original Research: Cybersecurity Challenges Faced by European Infosec Leaders

Nov 10, 2023 8:00:00 AM By Stu Sjouwerman

Cybersecurity threats continue to put European organisations of all sizes at risk. Infosec leaders face multi-pronged challenges, from mitigating the threats themselves to managing the ...

“Skillful Social Engineering of the IT Support Desk” One of the Most Common Tactics in Ransomware Attacks

Nov 9, 2023 3:57:11 PM By Stu Sjouwerman

As ransom payments reach an all-time high, it’s time to look at attacks from a data perspective and find the greatest opportunities to stop these attacks.

KnowBe4 Wins Multiple 2023 Best Of Awards From TrustRadius

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

KnowBe4 is proud to be recognized by TrustRadius for our Security Awareness Training and PhishER platforms in three categories for Best Value for Price, Best Relationship and Best Feature ...

New Phishing Campaign Abusing .top Domains

Nov 8, 2023 1:14:08 PM By Stu Sjouwerman

A phishing campaign is exploiting a large number of .top domains, according to researchers from WhoisXML API. In an article for CircleID, the researchers analyzed a phishing operation ...

New York Department of Financial Services Strengthens Cybersecurity Regulation

Nov 7, 2023 1:47:01 PM By Stu Sjouwerman

The NYDFS’ 23 NYCRR Part 500 has been updated to reflect the current preventative and responsive measures necessary for Financial Services org to be ready for cyber attacks.

New State of Phishing Report 2023: An Alarming Surge in Phishing Threats

Nov 7, 2023 1:46:54 PM By Stu Sjouwerman

The fight against cyber threats remains a top priority for all organizations, including phishing attacks. SlashNext just released its much-anticipated annual "State of Phishing Report for ...

Targeted Social Engineering on the Rise With Lowering Phishing-as-a-Service Costs

Nov 7, 2023 1:46:47 PM By Stu Sjouwerman

Targeted individuals were the most common victims of social engineering attacks in the second half of 2022 and the first half of 2023, according to researchers at AtlasVPN.

CyberheistNews Vol 13 #45 [BUDGET AMMO] The Outstanding ROI of KnowBe4's Security Awareness Training Platform

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

IT Admins Continue to Use Weak Passwords

Nov 6, 2023 5:26:21 PM By Stu Sjouwerman

In an analysis of web pages identified as admin portals, some incredibly weak passwords were identified – and some of them are going to really surprise you.

Healthcare Sector Experiencing Increases in Ransomware, Ransoms and Downtime

Nov 6, 2023 9:18:42 AM By Stu Sjouwerman

An analysis of ransomware attacks on healthcare organizations from 2016 through October of 2023 shows the healthcare sector is likely to continue to suffer as a viable ransomware target.

Spear Phishing Becomes Most Common Attack Technique in Q3 2023

Nov 6, 2023 9:18:13 AM By Stu Sjouwerman

Spear phishing was the most common attack technique in the third quarter of 2023, according to researchers at ReliaQuest.

Cybersecurity Expert: AI Lends Phishing Plausibility for Bad Actors

Nov 2, 2023 10:47:52 AM By Stu Sjouwerman

Cybersecurity experts expect to see threat actors increasingly make use of AI tools to craft convincing, highly targeted and sophisticated social engineering attacks, according to Eric ...

Small Businesses are Experiencing More Cyber Attacks

Nov 2, 2023 10:47:49 AM By Stu Sjouwerman

As large organizations realize the likelihood of cyber attacks and improve their cyber readiness, small businesses are seeing increases not experienced by their larger counterparts.

Investigate User-Reported Emails with Ease Through the Powerful Combination of CrowdStrike Falcon Sandbox and KnowBe4 PhishER Plus

Nov 2, 2023 10:20:30 AM By Stu Sjouwerman

The never-ending deluge of phishing emails, malware and ransomware threats can leave incident response and security operation teams (SOC) looking for faster ways to analyze user-reported ...

WSJ: "SEC Sues SolarWinds Over 2020 Hack Attributed to Russians"

Oct 31, 2023 10:24:03 AM By Stu Sjouwerman

October 30, 2023 the Wall street Journal broke news that the United States Security and Exchange Commission sued Solarwinds. Here are the first few paragraphs and there is a link to the ...

September Sees a 32% Increase in the Number of Ransomware Attacks in Just One Month

Oct 31, 2023 10:07:46 AM By Stu Sjouwerman

Continued analysis of ransomware attacks shows an upward trend in the number of attacks, with September resulting in the highest number of assaults so far this year.

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