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

Report: Phishing costs average organization $3.7 million per year

Aug 29, 2015 12:14:00 PM By Stu Sjouwerman

If you extrapolate the total annual cost of phishing for the average organization it comes to more than $3.7 million. You could shave that down by $1.8 million though, with the right ...

IBM: Corporations could be the next target for ransomware attacks

Aug 29, 2015 10:53:00 AM By Stu Sjouwerman

Doug Olenick at SC Magazine reported on something noteworthy: "The growing threat posed by ransomware and the possibility that cybercriminals will graduate from extorting end users to ...

What Is Worse Than Ransomware? Business Email Compromise

Aug 28, 2015 9:31:00 AM By Stu Sjouwerman

You are getting your Scam Of The Week early. Yesterday, the FBI via their Internet Crime Complaint Center announced some shocking numbers. There is a 270 percent spike in victims and cash ...

CyberheistNews Vol 5 #36 Breaking News: Got Hacked...The FTC Can Now Sue You

Aug 25, 2015 9:31:30 AM By Stu Sjouwerman

CyberheistNews Vol #5 #36 Aug 25, 2015 Breaking News: Got Hacked...The FTC Can Now Sue You For organizations that get hacked like Anthem, Target and recently Ashley Madison, the problems ...

Breaking News: Got Hacked? The FTC Can Now Sue You

Aug 25, 2015 7:50:00 AM By Stu Sjouwerman

For organizations that get hacked like Anthem, Target and recently Ashley Madison, the problems are only starting. Apart from towering legal fees and a damaged reputation, now an appeals ...

Stop The AshMad Insanity!

Aug 22, 2015 10:24:00 AM By Stu Sjouwerman

First a 10Gig dump with the full Ashley Madison database. Then a 20Gig dump with their whole Github repository, and then to top it all off a 300G(!) dump. In an interview with Motherboard ...

Phishing Alert: Warn Your Users Against Ashley Madison Scams Now

Aug 20, 2015 10:30:00 AM By Stu Sjouwerman

Your end-users saw this in the news yesterday, or will read about it today. The hackers who stole more than 36 million records from the Ashley Madison site (which makes it easy to cheat ...

Off With Their Heads! Execs get the ax for data breaches

Aug 19, 2015 5:28:00 PM By Stu Sjouwerman

Until last year, executives were able to pass the buck to IT in case a data breach hit the organization. However, several recent high-profile resignations are now putting the focus on ...

CyberheistNews Vol 5 #34 Scam Of The Week: Massive WebAd Poisoning

Aug 18, 2015 9:17:21 AM By Stu Sjouwerman

CyberheistNews Vol 5 #34 Aug 18, 2015 Scam Of The Week: Massive WebAd Poisoning The same cybercrime lowlifes that infected the Yahoo website a few weeks ago have struck again, this time ...

Scam Of The Week: Massive WebAd Poisoning

Aug 16, 2015 10:39:00 AM By Stu Sjouwerman

The same cybercrime lowlifes that infected the Yahoo website a few weeks ago have struck again, this time infecting sites like Drudge Report and Weather.com. Both sites have hundreds of ...

IT Confessions: The Deadly Six Sins Of Data Security

Aug 15, 2015 10:26:00 AM By Stu Sjouwerman

Massive hacks continue to fill the front page of major media outlets. The recent hack of the Federal Office of Personnel Management (OPM) by Chinese state-sponsored hackers again showed ...

CyberheistNews Vol 5 #32 Massive 46M Dollar Cyberheist / Pentagon Spear-phished / BlackHat Hot & Scary

Aug 11, 2015 8:37:59 AM By Stu Sjouwerman

CyberheistNews Vol 5 #32 Aug 11, 2015 Massive 46M Dollar Cyberheist / Pentagon Spear-phished / BlackHat Hot & Scary Brian Krebs just reported on a massive 46M dollar Cyberheist. Tech ...

Proudly showing our new Logo on the Building

Aug 10, 2015 4:15:07 PM By Stu Sjouwerman

This Weekend's Microsoft Windows 10 Upgrade Nightmare

Aug 10, 2015 10:01:00 AM By Stu Sjouwerman

OK, so I decided to upgrade my plain vanilla Dell XPS box that I bought 2 years ago, running Windows 8.1. Enough memory, nothing special installed. Upgraded using the "Get Windows 10" ...

Check Out What Elon Musk Just Emailed Me

Aug 9, 2015 11:41:00 AM By Stu Sjouwerman

Elon Musk sent me this email: "If you have friends who might like to receive a $1,000 discount on a Model S, below is an email that you can edit if you choose and send to them." Now, I ...

The Inside Story Of The Biggest Hack In History

Aug 9, 2015 9:44:00 AM By Stu Sjouwerman

It was known inside the InfoSec community, but now more details have been made public through CNN after a BlackHat 2015 presentation: "Three years ago, the world witnessed the worst hack ...

Blackhat 2015 What Was Hot And Scary?

Aug 8, 2015 4:24:00 PM By Stu Sjouwerman

It was another great BlackHat. If you could not make it, here is a roundup of things that I thought were particularly interesting from the perspective we have here at KnowBe4. It's a ...

Pentagon Top Brass Spear-phished

Aug 8, 2015 3:31:00 PM By Stu Sjouwerman

The Pentagon divulged that its computer networks were penetrated by suspected Russian hackers using spear-phishing. The hackers got into their unclassified email network used by the Joint ...

Tech Firm Ubiquiti Suffers $46M Cyberheist

Aug 7, 2015 4:31:00 PM By Stu Sjouwerman

Brian Krebs just reported on a massive $46M Cyberheist. Networking firm Ubiquiti Networks Inc. disclosed this week that cyber thieves recently stole $46.7 million using an increasingly ...

CyberheistNews Vol 5 #31 Scam Of The Week: Microsoft Windows 10 Upgrade Installs Ransomware

Aug 4, 2015 9:26:24 AM By Stu Sjouwerman

CyberheistNews Vol #5 #31 August 4, 2015 Scam Of The Week: Microsoft Windows 10 Upgrade Installs Ransomware Major Operating System upgrades usually cause confusion among end-users and the ...

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