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

Alarming Tax Phishing Campaign Targets US with Malware

Apr 10, 2023 10:21:40 AM By Stu Sjouwerman

Researchers at Securonix are tracking an ongoing phishing campaign dubbed “TACTICAL#OCTOPUS” that’s been targeting users in the US with tax-related phishing emails.

[INFOGRAPHIC] The Forrester Total Economic Impact™ of KnowBe4 by the Numbers

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

KnowBe4 commissioned Forrester Consulting to conduct a Total Economic ImpactTM study* examining the potential Return on Investment (ROI) enterprises might realize by deploying KnowBe4's ...

Your KnowBe4 Fresh Content Updates from March 2023

Apr 7, 2023 8:00:00 AM By Stu Sjouwerman

Check out the 49 new pieces of training content added in March, alongside the always fresh content update highlights, events and new features.

Recently Exposed North Korean Threat Actor APT43 Targeting Organizations With Spear Phishing

Apr 6, 2023 9:02:08 AM By Stu Sjouwerman

Google’s Threat Analysis Group (TAG) has published a report describing the activities of “ARCHIPELAGO,” a subset of the North Korean state-sponsored threat actor APT43. ARCHIPELAGO’s ...

New Emotet Phishing Campaign Pretends to be the IRS Delivering W-9 Forms

Apr 6, 2023 8:33:39 AM By Stu Sjouwerman

A newly documented phishing campaign demonstrates how timely themes can be impactful in creating a successful attack that gets the recipient to engage with malicious content.

FBI: Business Email Compromise Attacks Are Being Used to Make Bulk Goods Purchases from Vendors

Apr 6, 2023 8:33:35 AM By Stu Sjouwerman

A new public service announcement focuses on a specific form of BEC attack using little more than a spoofed domain and common vendor payment practices to steal hardware, supplies and more.

1 in 8 Email Threats Now Make It Past Email Security Solutions

Apr 6, 2023 8:33:33 AM By Stu Sjouwerman

Phishing attacks that can evade detection by email scanners are improving their chances of reaching the inbox, thanks to an increase in the use of one specific attachment type.

"We are hurtling toward a glitchy, spammy, scammy, AI-powered internet."

Apr 5, 2023 3:06:23 PM By Stu Sjouwerman

This MIT Technology Review headline caught my eye, and I think you understand why. They described a new type of exploit called prompt injection.

FBI: 870 Critical Infrastructure Organizations Were the Victim of Ransomware in 2022

Apr 5, 2023 1:32:20 PM By Stu Sjouwerman

The FBI’s newly-released report shows just how ransomware continues to plague critical infrastructure sectors, despite the U.S. government’s recent efforts to stop these attacks.

That’s Not Actually Mr. Musk, That's a Scam

Apr 5, 2023 11:43:02 AM By Stu Sjouwerman

A school principal in Volusia County, Florida has resigned after sending $100,000 to a scammer posing as Elon Musk, WESH 2 News reports. Dr. Jan McGee from the Burns Science and ...

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

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

Cybercriminals have become thoughtful about ransomware attacks; taking time to maximize your organization’s potential damage and their payoff. Protecting your network from this growing ...

Scareware From a Phony Ransomware Group

Apr 4, 2023 9:50:02 AM By Stu Sjouwerman

BleepingComputer reports that a cybercriminal gang is sending phony ransomware threats to prior victims of ransomware attacks. The gang, which calls itself “Midnight,” claims to have ...

CyberheistNews Vol 13 #14 [Eyes on the Prize] How Crafty Cons Attempted a 36 Million Vendor Email Heist

Apr 4, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #14 | April 4th, 2023 [Eyes on the Prize] How Crafty Cons Attempted a 36 Million Vendor Email Heist The details in this thwarted VEC attack demonstrate how the use ...

Social Engineering Attacks Utilizing Generative AI Increase by 135%

Apr 4, 2023 8:08:53 AM By Stu Sjouwerman

New insights from cybersecurity artificial intelligence (AI) company Darktrace shows a 135% increase in novel social engineering attacks from Generative AI.

Ukrainian Police Take Down Cybercrime Ring

Apr 3, 2023 11:51:13 AM By Stu Sjouwerman

The Cyber Police of Ukraine have arrested twelve alleged members of an organized cybercrime group that’s stolen approximately $4.3 million from users across Europe, the Hacker News ...

Mid-Sized Businesses Lack the Staffing, Expertise, and Resources to Defend Against Cyberattacks

Apr 3, 2023 8:16:11 AM By Stu Sjouwerman

Mid-sized businesses – those with 250 to 2000 employees – don’t appear to have what they need to fend off attacks in a number of critical ways.

Majority of Government Employees are Partially Working Virtually Despite Increased User-Related Cyber Risks

Apr 3, 2023 8:16:08 AM By Stu Sjouwerman

New global data shows that those government employees that work solely in the office are the new minority, IT lacks visibility, and user actions put the government at risk.

Fake ChatGPT Scam Turns into a Fraudulent Money-Making Scheme

Apr 3, 2023 8:16:05 AM By Stu Sjouwerman

Using the lure of ChatGPT’s AI as a means to find new ways to make money, scammers trick victims using a phishing-turned-vishing attack that eventually takes victim’s money.

The New Face of Fraud: FTC Sheds Light on AI-Enhanced Family Emergency Scams

Mar 31, 2023 9:41:32 AM By Stu Sjouwerman

The Federal Trade Commission is alerting consumers about a next-level, more sophisticated family emergency scam that uses AI which imitates the voice of a "family member in distress".

Artificial Intelligence Makes Phishing Text More Plausible

Mar 30, 2023 8:58:09 AM By Stu Sjouwerman

Cybersecurity experts continue to warn that advanced chatbots like ChatGPT are making it easier for cybercriminals to craft phishing emails with pristine spelling and grammar, The ...

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