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

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Verizon's New 2014 Data Breach Report: Summary

Apr 27, 2014 11:35:00 AM By Stu Sjouwerman

In IT, we are subject to help desk tickets and putting out fires. The problem with this is that most of these are short-term fixes. It is usually about last week's downtime, today's ...

WARNING Third Ransomware Strain Called CryptorBit Attacks

Apr 26, 2014 9:14:00 AM By Stu Sjouwerman

Welcome to the new world of malware.

CyberheistNews Vol 4, # 16 Scam Of The Week: XP Phishing Threat

Apr 22, 2014 9:15:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 16

Police Grapple With Cybercrime And Have Trouble Keeping Up

Apr 21, 2014 10:43:00 AM By Stu Sjouwerman

Danny Yadron at the WSJ got the picture right. State, and local law enforcement are struggling to keep up as their online case load grows. They are even gettting a hand from the FBI here ...

Scam Of The Week: Blended XP Phishing Security Threat

Apr 20, 2014 11:22:00 AM By Stu Sjouwerman

During the first quarter, I have been warning about the coming wave of Windows XP-related scams having to do with the April 8 End Of Life of XP. Here is what you can expect, and many ...

Scam Of The Week: Starbucks Gift From a Friend Phishing Emails

Apr 17, 2014 12:03:00 PM By Stu Sjouwerman

Love your tall latte? Better watch it, as a "friend" might send you an email with a fake Starbucks Coffee Gift offer. These emails read something like this in broken english. "Your friend ...

What's The Best Free Antivirus For Windows 8?

Apr 16, 2014 11:13:00 AM By Stu Sjouwerman

Use the free built-in antivirus called Windows Defender? Use a free tool like Avast? Buy a third party tool?

Phishing Attacks Work Best On Wednesday, Coming From IT

Apr 15, 2014 4:16:00 PM By Stu Sjouwerman

I had a look at the recent Mandiant M-Trends report. Interesting stuff. They observed that employees seem to fall for hacking tricks mostly on Wednesdays, and are most likely to click on ...

CyberheistNews Vol 4, # 15 Scam Of The Week: Heartbleed Phishing Attack

Apr 15, 2014 9:15:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 15

Pirated PC's And Software Loaded With Malware

Apr 14, 2014 2:16:00 PM By Stu Sjouwerman

Here is another reason why buying legitimate operating systems and application software is a good idea. A new study conducted by IDC and commissioned by Microsoft reveals some troubling ...

The history of malware samples in numbers

Apr 12, 2014 12:31:00 PM By Stu Sjouwerman

Virus Bulletin came up with some interesting historical facts. In 1989, when the very first Virus Bulletin rolled off the press (produced in a black-and-white, printed pamphlet style), ...

Wall Street Journal Quoted Me Regarding Ransomware Phishing Attacks

Apr 10, 2014 10:21:00 AM By Stu Sjouwerman

This week, Wall Street Journal MarketWatch reporter Priya Anand quoted me in an article she wrote about the new wave of ransomware phishing attacks.

More Than Half Of End Users Did Not Get Security Awareness Training

Apr 10, 2014 9:23:00 AM By Stu Sjouwerman

This week I attended a webinar about Security Awareness Training hosted by David Monahan, Research Director Security and Risk Management of Enterprise Management Associates.

CyberheistNews Vol 4, # 14

Apr 8, 2014 9:07:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 14

Backup Failures And Ransomware Phishing: Recipe For Disaster

Apr 7, 2014 4:02:00 PM By Stu Sjouwerman

With system administrators in the crossfire between cybergangs who are wielding sophisticated ransomware like CryptoLocker on one side and CryptoDefense on the other, it's likely many of ...

The 7 Steps Of The Cyber Kill Chain

Apr 6, 2014 10:09:00 AM By Stu Sjouwerman

Cyber security professionals are slowly but surely grabbing more and more military jargon. No surprises there, with a possible cyberwar brewing. The "kill chain" is a traditional warfare ...

14 Things That Definitely Should Not Be On The Internet, But Are

Apr 6, 2014 9:08:00 AM By Stu Sjouwerman

You would think that after the recent few years of press showing the risks of the Internet that people would wise up. But no. To my astonishment it's getting worse, not better. Just have ...

ALERT - CryptoLocker Has A Competitor That Is Worse: CryptoDefense

Apr 1, 2014 6:58:00 PM By Stu Sjouwerman

As we said before, there is furious competition between cybergangs. Late February 2014 a copycat ransomware competitor to Cryptolocker was released which outdoes CryptoLocker. The malware ...

CyberheistNews Vol 4, # 13 It's The XPOCALYPSE!... But Is It?

Apr 1, 2014 8:50:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 13

Scam Of The Week: Homicide Suspect

Mar 30, 2014 6:11:00 PM By Stu Sjouwerman

The same cybergang that was sending alarming emails about people being evicted from their homes, and are to appear in court, have a new variant of their racket. It's a community "alert" ...

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Stu Sjouwerman

Books

Recent Posts

Verizon's New 2014 Data Breach Report: Summary

WARNING Third Ransomware Strain Called CryptorBit Attacks

CyberheistNews Vol 4, # 16 Scam Of The Week: XP Phishing Threat

Police Grapple With Cybercrime And Have Trouble Keeping Up

Scam Of The Week: Blended XP Phishing Security Threat

Scam Of The Week: Starbucks Gift From a Friend Phishing Emails

What's The Best Free Antivirus For Windows 8?

Phishing Attacks Work Best On Wednesday, Coming From IT

CyberheistNews Vol 4, # 15 Scam Of The Week: Heartbleed Phishing Attack

Pirated PC's And Software Loaded With Malware

The history of malware samples in numbers

Wall Street Journal Quoted Me Regarding Ransomware Phishing Attacks

More Than Half Of End Users Did Not Get Security Awareness Training

CyberheistNews Vol 4, # 14

Backup Failures And Ransomware Phishing: Recipe For Disaster

The 7 Steps Of The Cyber Kill Chain

14 Things That Definitely Should Not Be On The Internet, But Are

ALERT - CryptoLocker Has A Competitor That Is Worse: CryptoDefense

CyberheistNews Vol 4, # 13 It's The XPOCALYPSE!... But Is It?

Scam Of The Week: Homicide Suspect

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