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

Phishing Websites Up 10 percent First Quarter 2014

Jul 3, 2014 11:24:00 AM By Stu Sjouwerman

The United States continued to host the majority of phishing websites in the first quarter of 2014, but did not even crack the top 36 when it came to global computer infection rates, ...

Prepare yourself for high-stakes cyber ransom

Jul 2, 2014 11:45:00 AM By Stu Sjouwerman

Roger Grimes over at InfoWorld did a great write-up about the state of cyber ransom these days. He also went back in history for a while and gives the factors that have led up to the ...

Phishing Scam Of The Week: You Are Summoned To Court

Jun 28, 2014 11:58:00 AM By Stu Sjouwerman

The AppRiver team dsicovered an increase in phishing scams containing the Zortob Trojan. The new surge uses an existing successful scam, which warns the victim that they've been ordered ...

New KnowBe4 Survey Shows IT Pros Concern About Ransomware Skyrocketing

Jun 27, 2014 4:11:00 PM By Stu Sjouwerman

Security Awareness Training and Backup Voted Most Effective Solutions to Combat CryptoLocker

PLEASE WHITELIST OUR NEW EMAIL SERVERS

Jun 27, 2014 2:08:00 PM By Stu Sjouwerman

First week of July we will cut over to a new mailserver, which allows us to use different "hover-domains" (meaning a user sees something else than the domain we used as the default up to ...

CyberheistNews Vol 4, # 25 CellphonePhishingHackPullsDatafromComputer

Jun 24, 2014 8:55:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 25

Stand-alone CryptoLocker Variant Found

Jun 22, 2014 5:44:00 PM By Stu Sjouwerman

It looks like the Russian evil genius behind Cryptolocker, Evgeniy Mikhailovich Bogachev, has not been sitting still since the recent international law enforcement "Operation Tovar" which ...

CyberheistNews Vol 4, # 24 Friday the 13th Crypto Horror Story

Jun 17, 2014 9:45:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 24

New Cellphone Phishing Hack Pulls Data Out Of Computer Over Air

Jun 16, 2014 4:00:00 PM By Stu Sjouwerman

This is from a few weeks ago, and I only just got to it. Hackers can exfiltrate data via a cellphone and no longer need the Internet to invade and control a system, Ben Gurion University ...

Can You Fix A Human Problem With A Technology Solution?

Jun 16, 2014 2:32:00 PM By Stu Sjouwerman

Let me be clear from the get-go: maybe partially but never 100%. Hundreds of IT security companies have tried and failed, just look at the malware infections you are battling regularly. ...

$440,000 Cyberheist Victim Now Needs To Pay Bank's Legal Fees

Jun 16, 2014 2:30:00 PM By Stu Sjouwerman

Talk about adding insult to injury. Brian Krebs has the update, he's been reporting on the legal gray area when cyber mafia steals hundreds of thousands out of a company's bank account. ...

Phishing Scam Of The Week: Free World Cup Trip To Brazil

Jun 10, 2014 4:34:00 PM By Stu Sjouwerman

The 2014 FIFA World Cup football (soccer) has kicked off this week, and so have phishing campaigns trying to trick you into scams for free tickets, realtime news and online streaming of ...

Finally Some Good News iPhone Ransomware Gang Busted

Jun 10, 2014 10:25:00 AM By Stu Sjouwerman

Finally some good news for a change. John Zorabedian at Sophos reported the following.

CryptoLocker Clone Serves Up Energy Bill Spam Campaign

Jun 10, 2014 9:57:00 AM By Stu Sjouwerman

And here's another ransomware wannabe that has ripped off the CryptoLocker brand but is something totally different. A recent spam campaign sending out emails masquerading as an ...

CyberheistNews Vol 4, # 23 CryptoWall Comes With Nasty Twist

Jun 10, 2014 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 23

New Ransomware CryptoWall Comes With A Twist

Jun 6, 2014 4:32:00 PM By Stu Sjouwerman

We’ll Pay Your Crypto-Ransom If You Get Hit With Ransomware

Jun 5, 2014 2:26:00 PM By Stu Sjouwerman

We’ll Pay Your Crypto-Ransom If You Get Hit

CyberheistNews Vol 4, # 22 Ransomware Holds iPhones and iPads Hostage

Jun 3, 2014 8:54:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 22

Malware creation breaks all records! 160,000 new samples every day

May 31, 2014 5:09:00 PM By Stu Sjouwerman

Helpnet Security reported: Malware creation has broken all records during this period, with a figure of more than 15 million new samples, and more than 160,000 new samples appearing every ...

New Ransomware Holds iPhones and iPads Hostage

May 31, 2014 4:29:00 PM By Stu Sjouwerman

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