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

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 ...

Some KnowBe4 Racing Fun At The Sebring Track

Aug 3, 2015 4:57:00 PM By Stu Sjouwerman

KnowBe4 had a July sales game and the top three reps won a day at Florida's Sebring racing track. They had a great day and here are some shots by KnowBe4's Creative Director Robert La ...

Scam Of The Week: Microsoft Windows 10 Upgrade Installs Ransomware.

Aug 3, 2015 11:33:26 AM By Stu Sjouwerman

Major Operating System upgrades are usually a cause of confusion among end-users and the current Windows 10 upgrade is no exception. The bad guys exploit these confusions in several ways, ...

Leaked NSA slides: Chinese hackers wreaking havoc on USA

Aug 2, 2015 9:24:00 AM By Stu Sjouwerman

I have been talking for years at this blog about the Chinese hacking into the U.S. for mainly espionage, using highly sophisticated social engineering and spear-phishing attacks. This ...

Phish or Be Phished? The Choice is Yours

Aug 1, 2015 7:40:00 AM By Stu Sjouwerman

By Guest Blogger Brad Mathis, Senior Consultant, Information Security It is mid-2015. By now, we have all seen incoming emails claiming we have been bequeathed a huge sum of money from a ...

CyberheistNews Vol 5 #30 How To Get The OK To Phish Your Own Employees

Jul 28, 2015 8:51:00 AM By Stu Sjouwerman

CyberheistNews Vol #5 #30 July 28, 2015 How To Get The OK To Phish Your Own Employees IT people responsible for network security talk to us all the time. Almost all of them agree that ...

Out With The Old And in With The New (KnowBe4 Logo)

Jul 23, 2015 3:32:00 PM By Stu Sjouwerman

We moved to a new 15,000 square feet office with expansion space for 100 KnowBe4 employees, and this week we had our logo mounted on the top of the building. This is a 30-second ...

You Asked For Training Campaigns And We Built It For You

Jul 21, 2015 9:33:00 AM By Stu Sjouwerman

By far the most requested feature in the KnowBe4 console was Training Campaigns. We're excited to tell you they are here now, in version 5.2 of your console. When it comes to rolling out ...

CyberheistNews Vol 5 #29 AshleyMadison: Second Nightmare Phishing Problem

Jul 21, 2015 9:17:21 AM By Stu Sjouwerman

CyberheistNews Vol #5 #29 July 21, 2015 AshleyMadison: Second Nightmare Phishing Problem Again, we have a nightmare phishing scenario with the brand new AshleyMadison (AM) hack. A few ...

AshleyMadison: Second Nightmare Phishing Problem

Jul 20, 2015 8:06:00 AM By Stu Sjouwerman

8/19/2015 UPDATE: Yesterday the full 10 Gigabyte database was released on the Internet, with all records including confidential files related to the company itself. People that registered ...

New TeslaCrypt's Shrewd Disguise as CryptoWall

Jul 18, 2015 12:41:00 PM By Stu Sjouwerman

Security researcher Fedor Sinitsyn reported on the new TeslaCrypt V2.0. This family of ransomware is relatively new, it was first detected in February 2015. It's been dubbed the "curse" ...

Blackhat 2015 Survey: End-User Wins Easily As IT's Big Worry

Jul 17, 2015 3:50:00 PM By Stu Sjouwerman

According to the 2015 Black Hat Attendee Survey, nearly three quarters (73 percent) of top security professionals think it likely that their organizations will be hit with a major data ...

Aggressive New Tech Support Social Engineering Scam

Jul 15, 2015 6:10:00 PM By Stu Sjouwerman

The Tech Support Scams are getting worse by the month. Here is a horror story that was just shared today. I suggest you read it, and keep alert for Red Flags like these! "My dad almost ...

CyberheistNews Vol 5 #28 Scam Of The Week: Internet Capacity Warning

Jul 14, 2015 8:55:55 AM By Stu Sjouwerman

CyberheistNews Vol #5 #28 July 14, 2015 Scam Of The Week: Internet Capacity Warning OK, so here is the latest scam, possibly fueled by the recent news that we have run out of IPv4 ...

U.K.-hedge fund loses a million dollars in social engineering attack

Jul 13, 2015 1:42:06 PM By Stu Sjouwerman

A British hedgefund lost more than a million dollars in a social engineering attack on their Chief Financial Officer Thomas Meston, and there is an expensive court case going on because ...

OPM: 'Victim-as-a-Service' Provider

Jul 12, 2015 12:25:00 PM By Stu Sjouwerman

Unconscionable. I would even say callous and criminal negligence, all on the current administration's watch, of the highly confidential and very private information of the people working ...

Scam Of The Week: Internet Capacity Warning

Jul 12, 2015 10:58:00 AM By Stu Sjouwerman

OK, so here is the latest scam of the week, possibly fueled by the recent news that we have run out of IPv4 addresses in the U.S. Employees receive an email which claims to be from the ...

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