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

And Just When You Thought Locky Ransomware Had Disappeared...

Apr 22, 2017 9:47:47 AM By Stu Sjouwerman

Locky ransomware reappeared with a vengeance Friday, this time not using Office documents combined with social engineering to have the user enable macros, but with a PDF that has a Word ...

[ALERT] Aaron Hernandez Death Phishing Scams

Apr 20, 2017 8:04:33 AM By Stu Sjouwerman

Low-life scum is exploiting the deaths of famous people, such as the suicide yesterday of former N.E. Patriots player Aaron Hernandez.

UK Cybersecurity Report: "Ransomware Is Urgent Issue"

Apr 19, 2017 12:10:15 PM By Stu Sjouwerman

Today, the UK Government issued a comprehensive report called: "Cyber Security Breaches Survey 2017" and covered the skyrocketing ransomware infections. The report highlighted: "The ...

The three ‘B’s’ of cybersecurity for small businesses

Apr 19, 2017 11:16:22 AM By Stu Sjouwerman

I just found a great article by Scott Shackelford, Associate Professor of Business Law and Ethics; Director, Ostrom Workshop Program on Cybersecurity and Internet Governance; ...

CyberheistNews Vol 7 #16 Scam of the Week: It's Not a WhatsApp Voice Mail!

Apr 18, 2017 9:42:32 AM By Stu Sjouwerman

Scam Of The Week: It's Not A WhatsApp Voice Mail!

Apr 16, 2017 11:43:57 AM By Stu Sjouwerman

You probably know that the Eastern European cyber mafia does their beta testing in the U.K., before they "export" their criminal campaigns to America. Here is a heads-up of a social ...

Why Cerber Is The New King Of Ransomware

Apr 15, 2017 11:23:46 AM By Stu Sjouwerman

During 2016, ransomware exploded. It clearly became the biggest menace on the net, using phishing as it's No.1 infection vector. Hundreds of ransomware strains competed for market ...

Inside the Tech Support Scam Ecosystem

Apr 15, 2017 9:37:50 AM By Stu Sjouwerman

Dennis Fisher at OnThe Wire reported on some fascinating research by three PhD candidates at Stony Brook University. He wrote: "Fake tech support schemes have been a scourge on the ...

First Quarter 2017 Top-Clicked Phishing Email Subjects [INFOGRAPHIC]

Apr 13, 2017 5:30:13 PM By Stu Sjouwerman

KnowBe4 customers run millions of phishing tests per year, and we report frequently on the top-clicked phishing topics so that our customers know what the highest-risk phishing templates ...

[ALERT] You Want To Fix This MS-Word 0-day Threat Today

Apr 12, 2017 7:43:49 AM By Stu Sjouwerman

Monday night, researchers at Proofpoint sounded the alarm about a critical 0-day threat known as CVE-2017-0199 in Microsoft Word that allowed booby-trapped Dridex phishing attacks be sent ...

KnowBe4 March And April Feature Updates

Apr 10, 2017 2:03:26 PM By Stu Sjouwerman

Here is a quick update to show existing customers and people who have not subscribed yet which new features have been added to the KnowBe4 console these last few months, with more ...

CyberheistNews Vol 7 #15 New Research: Big Trouble for Americans in Recognizing Phishing Attacks

Apr 10, 2017 9:41:09 AM By Stu Sjouwerman

Scammers Phishing for financial credentials on Twitter

Apr 8, 2017 5:21:21 PM By Stu Sjouwerman

Steve Ragan at CSO wrote: "Scammers are using Twitter as a vehicle to target people looking for customer support or asking general questions. They interject themselves into legitimate ...

Cybersecurity IQ: Americans Have Trouble Recognizing Phishing Attacks

Apr 8, 2017 10:26:11 AM By Stu Sjouwerman

A new Pew Research Center survey titled "What the Public Knows about Cybersecurity." tallied responses from 1,055 adults last year about their understanding of concepts important to ...

Hacking Compromised Brazilian Bank Top To Bottom

Apr 8, 2017 9:32:52 AM By Stu Sjouwerman

Now here is an IT hacking horror story for you! Kaspersky's blog tells the tale of a bank in Brasil who lost their full online presense and had all of its 36 domains, corporate email and ...

Which phishing emails fooled the most people? [INFOGRAPHIC]

Apr 7, 2017 2:45:22 PM By Stu Sjouwerman

Kevin Mitnick, our Chief Hacking Officer forwarded this great poster to me he found on Twitter today: "Which phishing emails fooled the most people?" Share it with your users!

KnowBe4 Is TampaBay's No.1 Midsize Best Place To Work 2017

Apr 7, 2017 6:33:27 AM By Stu Sjouwerman

I did not get much sleep last night. Too excited. Donna Winchester, Times Correspondent sent me an email yesterday that today at 5am the story would go live. What story?Where KnowBe4 ...

KnowBe4 Gets Top Award At InfoSecWorld Conference

Apr 4, 2017 10:55:17 AM By Stu Sjouwerman

Drum roll!!! We were given some great news last night and informed that we were honored with a top award from Black Book at the InfoSecWorld Conference in Orlando, FL. One of the nice ...

KnowBe4 Reports Record Q1 2017 Performance

Apr 4, 2017 8:00:00 AM By Stu Sjouwerman

Friday March 31, 2017 was the best day of my professional career. A "million-dollar day", highest-ever month and highest-ever quarter. A massive thank you to all our existing and new ...

CyberheistNews Vol 7 #14 Scam of the Week: The Evil Airline Phishing Attack

Apr 3, 2017 9:50:48 AM By Stu Sjouwerman

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