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

New KnowBe4 Feature: Vulnerable Browser Plugin Detection

May 5, 2016 4:08:39 PM By Stu Sjouwerman

How Can I See If My Users Have Vulnerable Browser Plugins Installed? Within your console, you can automatically detect what vulnerable plugins any clickers on your phishing tests have ...

CyberheistNews Vol 6 #18 [ALERT] Ransomware explodes in 2016. Here is the new roundup!

May 2, 2016 8:42:36 AM By Stu Sjouwerman

Verizon 2016 Data Breach Report: "Phishing Tops The List Of Increasing Concerns"

May 1, 2016 12:50:25 PM By Stu Sjouwerman

Verizon yearly does a comprehensive report on security and data breaches. It is excellent ammo to get budget approval for new-school security awareness training. Why? Hundreds of security ...

[ALERT] 2016 Is A Ransomware Horror Show. Here's The Roundup Of 32 New Strains!

Apr 30, 2016 10:21:40 AM By Stu Sjouwerman

If you've been in the IT trenches over the past year, you've probably noticed the announcements of new strains of ransomware are accelerating. The research team at Proofpoint just ...

The Phishing Attack That Came Out Of Zendesk

Apr 26, 2016 4:46:54 PM By Stu Sjouwerman

Yesterday, April 25 2016, we encountered a new phishing email being delivered through Zendesk. The credentials phish itself is a straightforward social engineering attack. The email body ...

CyberheistNews Vol 6 #17 Scary New CryptXXX Ransomware Also Steals Your Bitcoins

Apr 26, 2016 9:30:49 AM By Stu Sjouwerman

Scary New CryptXXX Ransomware Also Steals Your Bitcoins

Apr 23, 2016 4:28:53 PM By Stu Sjouwerman

Now here's a new hybrid nasty that does a multitude of nefarious things. Proofpoint researchers found that it was built by the same cyber mafia that's behind the Reveton malware. A few ...

Scam Of The Week: Secure Document Phishing Attacks Trap Employees

Apr 23, 2016 10:48:26 AM By Stu Sjouwerman

In this Scam Of The Week we are warning against a new wave of phishing scams. In the industry this is called the "secure doc" theme. It's getting very popular with the bad guys. We see a ...

Scam Of The Week: Prince Last Words On Video

Apr 21, 2016 8:18:38 PM By Stu Sjouwerman

Today, news broke that Prince Rogers Nelson was found dead in his home in Minneapolis at age 57. He was found unresponsive in an elevator and was declared dead shortly after. He performed ...

[ FTC ALERT ] Don't Get Scammed By Earthquake Phishing Emails

Apr 21, 2016 3:10:20 PM By Stu Sjouwerman

It's the old story. A disaster strikes and 24 hours later you get emails with urgent request for help as hundreds of wounded victims need food, water and shelter. And the bad guys are at ...

CyberheistNews Vol 6 #16 FBI: "Ransomware On Pace To Be A 1 Billion Dollar Business In 2016"

Apr 19, 2016 9:22:54 AM By Stu Sjouwerman

CyberheistNews Vol 6 #16 FBI: "Ransomware On Pace To Be A 1 Billion Dollar Business In 2016" CNN Money reports about new estimates from the FBI show that the costs from ransomware have ...

A Short History & Evolution of Ransomware

Apr 17, 2016 4:44:24 PM By Stu Sjouwerman

Ransomware attacks cause downtime, data loss, possible intellectual property theft, and in certain industries a ransomware attack is now looked at as a possible data breach. Ransomware is ...

CTB-Locker Ransomware Uses Blockchain to Store & Deliver Decryption Keys

Apr 16, 2016 4:48:21 PM By Stu Sjouwerman

A mysterious update in the behavior of the CTB-Locker ransomware strain alerted security researchers to pull some strings and see what was going on. The CTB-Locker ransomware family, ...

Ransomware On Pace To Be A 2016 $1 Billion Dollar Business

Apr 16, 2016 10:34:21 AM By Stu Sjouwerman

CNN Money reports about new estimates from the FBI that show the costs of ransomware have reached an all-time high this year. Threat actors made $209 million in the first quarter of 2016 ...

Phishing Attacks Hit the C-Suite With High Value Scams [INFOGRAPHIC]

Apr 16, 2016 9:00:38 AM By Stu Sjouwerman

OK, here is great ammo to get more IT security budget. Why? This article and infographic make it real to the C-suite that they themselves have a big phishing target on their back. You all ...

US Company Falls Victim To $100 Million CEO Email Fraud

Apr 15, 2016 8:08:36 AM By Stu Sjouwerman

An as yet unknown American company fell victim to nearly $100 million in CEO Fraud. Employees were social engineered by spoofed emails that claimed to be one of its legitimate vendors, ...

They Shoot Files, Don't They? Jigsaw Ransomware Does...

Apr 14, 2016 11:07:29 AM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher. A few days ago our friends at BleepingComputer.com announced the discovery of a new form of ransomware, which they dubbed Jigsaw ...

The Future Of Ransomware: CryptoWorms?

Apr 12, 2016 2:52:36 PM By Stu Sjouwerman

Cisco's Talos Labs researchers had a look into the future and described how ransomware would evolve. It's a nightmare. They created a sophisticated framework for next-gen ransomware that ...

Exciting New Features In KnowBe4 Spring 2016 Release

Apr 12, 2016 8:47:40 AM By Stu Sjouwerman

We have several cool new features in the Spring 2016 release! These features were previously out of reach for IT managers with limited budget, and we're excited you can use them now with ...

CyberheistNews Vol 6 #15 [FBI ALERT] Dramatic Increase In Email CEO Fraud To 2.3 Billion.

Apr 12, 2016 8:44:05 AM By Stu Sjouwerman

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