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

America Ponies Up: Ransomware Payments Rise To $1,077 Per Infection

Apr 29, 2017 9:54:33 AM By Stu Sjouwerman

America was the victim of 34 percent of global ransomware infections in 2016. The "why" is clear; a whopping 64 percent of Americans are willing to pay to get their files back, as opposed ...

100+ Free Ransomware Decryption Tools

Apr 28, 2017 2:16:00 PM By Stu Sjouwerman

The threat of ransomware has never been more real. In fact, 2016 was a record year. Here are some scary statistics from the past year put together by the folks at Barkly: Nearly 50 ...

Northrop Grumman can make a stealth bomber – but falls for W-2 phishing attack

Apr 27, 2017 7:25:59 AM By Stu Sjouwerman

US military contractor Northrop Grumman notified their employees that hackers managed to gain access to their W-2 tax records. As The Register just reported, the makers of America’s ...

Newark City Hall Computers Infected With Ransomware

Apr 25, 2017 11:45:28 AM By Stu Sjouwerman

NEWARK, N.J. (CBSNewYork) — . The City of Newark’s computer system has been disabled by hackers demanding thousands in ransom money, according to a published report. Hackers are demanding ...

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 ...

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