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

Your KnowBe4 Fresh Content Updates from February 2023

Mar 3, 2023 8:01:00 AM By Stu Sjouwerman

Check out the 24 new pieces of training content added in February, alongside the always fresh content update highlights, events and new features.

Financial Services Sector at Risk of More Significant Impacts of Email-Based Cyber Attacks

Mar 3, 2023 8:00:00 AM By Stu Sjouwerman

Financial services businesses are already in the sights of cybercriminals, and understanding how cyber attacks impact this sector specifically can help establish the need for improved ...

CISA's latest ransomware warning promotes fighting social engineering at the top of the document, once again

Mar 3, 2023 6:58:12 AM By Stu Sjouwerman

So, today CISA released another ransomware notice. The Cybersecurity and Infrastructure Security Agency is an agency of the United States Department of Homeland Security that is ...

[On-Demand] 5 Ways PhishER Saves You Time and Money

Mar 2, 2023 12:01:03 PM By Stu Sjouwerman

Time is the one resource you never get back. Cutting the amount of time between the moment your user reports a suspicious email and when your InfoSec team responds can mean the difference ...

Customer Care Numbers as Phishbait

Mar 2, 2023 8:50:50 AM By Stu Sjouwerman

Researchers at CloudSEK have published a report looking at fraudulent customer service phone numbers in India. The researchers found around 20,000 of these phone numbers targeting users ...

[Eye Opener] Businessweek: The Satellite Hack Everyone Is Finally Talking About

Mar 2, 2023 7:09:33 AM By Stu Sjouwerman

This morning, Bloomberg News pointed at a brand new article at BusinessWeek, one of their media properties. This is an excellent article that exposes the vulnerabilities when ...

Remote Workers Significantly Increase the Cost of Remediating Email-Based Cyberattacks as Costs Average $1 Million

Mar 1, 2023 1:52:30 PM By Stu Sjouwerman

With the average cost of the most expensive successful email attack at over $1 million, it’s necessary to begin to zero in on where the material sources of risk exist to keep these ...

NameCheap’s SendGrid Email Account Compromised, Used to Send Phishing Emails

Mar 1, 2023 1:52:16 PM By Stu Sjouwerman

Since phishing attacks need legitimacy to increase their deliverability, this latest twist shows how phishing scammers and hackers are working together to ensure phishing attacks continue.

Business Email Compromise Gang Gets Jail Time for Stealing Millions

Feb 28, 2023 11:52:14 AM By Stu Sjouwerman

An international cybercriminal operation responsible for millions of dollars in business email compromise (BEC) scams has finally been dismantled.

Blind Eagle Goes Phishing

Feb 28, 2023 11:52:11 AM By Stu Sjouwerman

BlackBerry has published a report on a threat actor, Blind Eagle, also known as APT-C-36, which has been operating against targets in Ecuador and Colombia since at least 2019. Its most ...

CyberheistNews Vol 13 #09 [Eye Opener] Should You Click on Unsubscribe?

Feb 28, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #09 | February 28th, 2023 [Eye Opener] Should You Click on Unsubscribe? By Roger A. Grimes. Some common questions we get are "Should I click on an unwanted email's ...

Thousands of NPM Packages Used to Spread Phishing Links

Feb 27, 2023 8:39:49 AM By Stu Sjouwerman

Researchers at Checkmarx warn that attackers uploaded more than 15,000 packages to NPM, the open-source repository for JavaScript packages, to distribute phishing links. The packages ...

Malware Report: The Number of Unique Phishing Emails in Q4 Rose by 36%

Feb 23, 2023 11:28:45 AM By Stu Sjouwerman

With nearly 280 million phishing emails detected by just one vendor, and the increase in the number of unique emails, organizations have a lot to be worried about in 2023.

W-2s Are Just the Beginning of Tax-Related Scams This Year

Feb 23, 2023 11:28:23 AM By Stu Sjouwerman

Email scammers can’t pass up a tried and true theme that is almost guaranteed to produce results. And with W-2 forms being sent out, it marks the start of this year’s expected campaigns.

Ransomware Attacks Using Extortion Tactics Reaches Critical Mass at 96% of all Attacks

Feb 23, 2023 11:28:04 AM By Stu Sjouwerman

New cyber attack data from 2022 is providing insight into what to expect in 2023, including ransomware campaigns.

28% of Users Open BEC Emails as BEC Attack Volume Skyrockets by 178%

Feb 23, 2023 11:27:44 AM By Stu Sjouwerman

New data shows users aren’t scrutinizing emails used in business email compromise (BEC) attacks, allowing critical changes in banking details that would impact the victim's organization ...

Coinbase Attack Used Social Engineering

Feb 22, 2023 8:48:30 AM By Stu Sjouwerman

Coinbase describes a targeted social engineering attack that led to the theft of some employee data. The attacker first sent smishing messages to several Coinbase employees, urging them ...

A Special Case of Business Email Compromise

Feb 21, 2023 9:12:41 AM By Stu Sjouwerman

Cloudflare warns that business email compromise (BEC) phishing has assumed a new form: vendor email compromise (VEC). The classic BEC case involves the impersonation of someone within an ...

CyberheistNews Vol 13 #08 [Heads Up] Reddit Is the Latest Victim of a Spear Phishing Attack Resulting in a Data Breach

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

CyberheistNews Vol 13 #08 | February 21st, 2023 [Heads Up] Reddit Is the Latest Victim of a Spear Phishing Attack Resulting in a Data Breach There is a lot to learn from Reddit's recent ...

Corporate Transitions Represent Times of Heightened Danger

Feb 20, 2023 10:05:40 AM By Stu Sjouwerman

When should organizations be on guard against social engineering? Always, of course, but there are certain times when they should be especially alert. A study of cyberattacks has found ...

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