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

October Is The Time To Kill Old-School Security Awareness Training

Oct 10, 2016 1:00:03 PM By Stu Sjouwerman

CSO had an excellent article that states the case that you need to get rid of old-school awareness training which you do for compliance reasons only. Their photo illustration was funny as ...

Scam Of The Week: Insidious New IRS Social Engineering Attack

Oct 10, 2016 10:13:00 AM By Stu Sjouwerman

There is a new insidious IRS scam that you need to warn your employees, friends and family about, and inform your HR department to start with. Seasoned internet criminals are sending ...

KnowBe4 beats stellar Q2 and grows 369% YoY in Q3

Oct 9, 2016 1:03:59 PM By Stu Sjouwerman

(Tampa Bay, FL) October 9, 2016 --- KnowBe4 is excited to announce we were able to beat our stellar Q2, and maintain our explosive year over year growth, Q3 2016 being 369% over Q3 2015. ...

Did You Know That Ransomware Can Stop SQL So It Can Encrypt The Database?

Oct 9, 2016 12:10:52 PM By Stu Sjouwerman

I have been knee deep into Ransomware since September 2013 when the granddaddy of modern ransomware CryptoLocker made well over 20 million bucks in a few months. But sometimes I learn ...

The 7 Levels Of Hackers

Oct 9, 2016 7:35:54 AM By Stu Sjouwerman

Eric Chabrow over at the Government Info Security blog found an interesting post by Stuart Coulson, who is a director of a hosting provider in the U.K. Coulson wrote a somewhat longish ...

Massive Cerber Ransomware Campaign Flooding Your Employees' Inboxes

Oct 5, 2016 6:18:50 AM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher. This Monday morning many of our customers came in to work to find a rather rude surprise lurking in their inboxes: a massive Cerber ...

CyberheistNews Vol 6 #40 This Weird Ransomware Strain Spreads Like A Virus In The Cloud

Oct 4, 2016 9:57:39 AM By Stu Sjouwerman

KnowBe4 Is Excited To Announce Active Directory Integration

Oct 3, 2016 10:09:55 AM By Stu Sjouwerman

We are stoked to announce the new integration with Active Directory! The Active Directory Integration (ADI) helps you easily upload user data and eliminate manual updates by automatically ...

Is Security Making The Grade? What IT And Business Pros Really Think

Oct 2, 2016 10:04:12 AM By Stu Sjouwerman

Great joint survey by CSO, CIO and ComputerWorld by Amy Bennett which is excelllent ammo to add to a budget request that needs to be approved by a C-level exec. Here's why: "If you sense ...

Uh oh, Yahoo May Have Been COMPLETELY Pwned

Oct 2, 2016 9:10:09 AM By Stu Sjouwerman

We predicted that this would happen on September 23rd when the news broke that Yahoo lost "at least" 500 Million credentials. Just for a change I'm quoting myself here: :-D "Right, that ...

This weird ransomware strain spreads like a virus in the cloud

Oct 1, 2016 1:17:15 PM By Stu Sjouwerman

Here is a ransomware horror story for you... An obscure 2-year old ransomware strain called Virlock has a nasty feature: it is capable of stealthily spreading itself via cloud storage and ...

InfoArmor: The Yahoo Hackers Were Not State-sponsored

Sep 29, 2016 3:54:11 PM By Stu Sjouwerman

Eastern European organized crime, not state-sponsored hackers, were behind the record breaking 2014 Yahoo data breach that exposed information about hundreds of millions of Yahoo user ...

Brazen: Phishing Attacks The Bad Guys Send When No One's Looking

Sep 28, 2016 4:21:56 PM By Stu Sjouwerman

When we talk with folks outside the security industry about what we see from the bad guys on a daily basis, we often get the response, "Wow! That's really sneaky." And it's true. The bad ...

Ransomware Is Now Officially Extortion Under California Law

Sep 28, 2016 4:03:48 PM By Stu Sjouwerman

Of course everyone knows that hacking into a computer is a federal crime, and infecting a system with ransomware already falls into that bucket. However, California’s SB-1137, signed into ...

CyberheistNews Vol 6 #39 Scam Of The Week: Apple Store Phishing Attack Goes For Whole Enchilada

Sep 26, 2016 9:58:44 AM By Stu Sjouwerman

Gang Uses Social Engineering To Steal 147 Million Dollars

Sep 26, 2016 7:19:41 AM By Stu Sjouwerman

Police have arrested a 147 million international fraud and money laundering ring, and jailed nine fraudsters jailed for over 27 years The gang targeted thousands of Lloyds and RBS ...

What is the Necurs Botnet And How Does It Spread Locky Ransomware?

Sep 25, 2016 7:30:57 AM By Stu Sjouwerman

In Short: The Necurs botnet is one of the world's largest botnets with more than 6 million zombie machines tied into it. It's run by Russian organized cybercrime and responsible for ...

Don't Make These Two Major Multi-Factor Security Mistakes

Sep 24, 2016 2:13:54 PM By Stu Sjouwerman

An employee sent this recent horror story to me (thanks Rachel). Remember there are three ways of learning. :-D Read it in a book, blog (or training session) understand it and apply it ...

Price Discrimination: The Fantom Menace of Ransomware

Sep 24, 2016 9:50:14 AM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher. Over the past few months we've discussed the rising use of price discrimination among purveyors of ransomware to maximize their returns on ...

New KnowBe4 Phishing Campaign Creation Screen

Sep 23, 2016 3:42:50 PM By Stu Sjouwerman

You asked and we listened! We’ve enhanced our Phishing Campaign creation options to give you more flexibility and customization when phishing your users! You can now: Phish your users ...

Security Awareness Training Blog

View Topics