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

Cyber Insurer Beazley Sees New Phishing Threats Emerge

Apr 25, 2017 10:53:34 AM By Stu Sjouwerman

New York, April 25, 2017 - Beazley, a pioneer in cyber and data breach response insurance, today released its Beazley Breach Insights – April 2017 findings based on its response to client ...

French Presidential Candidate Target Of Russian Hacker Phishing Attack

Apr 25, 2017 7:18:28 AM By Stu Sjouwerman

The French presidential election has been hit with a case of déjà vu. Emmanuel Macron's campaign said its staff received phishing emails meant to steal their passwords. Trend Micro said ...

This Week's Top "In The Wild" Phishing Attacks

Apr 24, 2017 1:27:23 PM By Stu Sjouwerman

And here are this week's Top 10 "In The Wild" phishing attacks that we received from our customers by employees clicking the Phish Alert Button and sending the email to us for analysis. ...

CyberheistNews Vol 7 #17 And Just When You Thought Locky Ransomware Had Disappeared...

Apr 24, 2017 9:39:29 AM By Stu Sjouwerman

U.S. Court Sentences Russian Hacker to a Record-Setting 27 Years

Apr 23, 2017 9:21:40 AM By Stu Sjouwerman

On Friday, a Seattle Federal District Court judge sentenced 32 year old Roman Valerevich Seleznev to 27 years in prison for running a vast credit card and identity theft operation, ...

NIST Releases Update to Cybersecurity Framework

Apr 22, 2017 10:54:31 AM By Stu Sjouwerman

The National Institute of Standards and Technology (NIST) has issued a draft update (PDF) to the Framework for Improving Critical Infrastructure Cybersecurity—also known as the ...

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 ...

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