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

Your Antivirus Enduser Is Exposed To Phishing Attacks For 17.5 Hours

May 2, 2015 1:04:00 PM By Stu Sjouwerman

The 2015 Websense threat report is abundantly clear about it. "Websense detected 28 percent of malicious email messages before an antivirus signature became available, presenting AV users ...

NEW: This Week's Five Most Popular HackBusters Posts 2015-5-2

May 2, 2015 12:41:33 PM By Stu Sjouwerman

NEW: This Week's Five Most Popular HackBusters Posts What are IT security people talking about? Here are this week's five most popular hackbusters posts: 1) The Untold Story Of Silk Road ...

10 Lessons Learned From Painful Ryanair $5M Cyberheist

May 1, 2015 5:44:00 PM By Stu Sjouwerman

Low-cost airline Ryanair shamefacedly came clean last week that they fell victim to a cyberheist which stole almost 5 million dollars out of its fuel bank account. The money was siphoned ...

Social Engineering Exploit Fools HR with Infected IT Resumes

May 1, 2015 1:58:17 PM By Stu Sjouwerman

Proofpoint threat researchers recently detected a clever email-based attack that combines phishing and social engineering techniques in order to trick users into opening a malicious ...

Scam Of The Week: Nepal Earthquake

Apr 30, 2015 9:58:00 AM By Stu Sjouwerman

More than 5,000 people dead and counting. And you can also count on cyber-criminals exploiting the disaster. What else is new. Disgusting. Scammers are now using the Nepal disaster to ...

New Multi-Language Ransomware Crypt0l0cker

Apr 29, 2015 12:23:50 PM By Stu Sjouwerman

Ransomware is being localized for large Asian countries now. There is an ongoing attack targeting Korea, followed by Malaysia and then Japan. If you have business partners or subsidiaries ...

Tesla Attack Caused By Social Engineering

Apr 29, 2015 10:28:23 AM By Stu Sjouwerman

A few days ago, you may have read the news that Tesla Motors had their website and Twitter accounts hijacked by pranksters. OpenDNS has a blog post that goes into great technical detail.

CyberheistNews Vol 5 #17 Apr 28, 2015 FUN CARTOON: The 5 Generations Of Security Awareness Training

Apr 28, 2015 9:10:00 AM By Stu Sjouwerman

FUN CARTOON: The 5 Generations Of Security Awareness Training For a change, let's have some fun for a moment. InfoSec is gloomy enough as you will see if you keep on reading. So first the ...

Ransomware Mafia Now Uses Bitcoin As Obfuscation Layer

Apr 26, 2015 1:09:00 PM By Stu Sjouwerman

Bitcoin is a very speculative currency, still relatively easy to manipulate compared to the major currencies, and subject to massive increases and drops in value. Currently the falling ...

How Criminals Exploit Gaps In Your Security Awareness Training

Apr 26, 2015 12:29:00 PM By Stu Sjouwerman

I was at RSA in San Francisco last week. Great show, with ~30,000 attendees and packed exhibit halls at the Moscone Center. We invited KnowBe4 customers who were attending RSA for a ...

CyberheistNews Vol 5 #16 Apr 21, 2015 - Scam Of The Week: IRS Refund Ransomware

Apr 21, 2015 9:13:00 AM By Stu Sjouwerman

*|CyberHeistNews|* Scam Of The Week: IRS Refund Ransomware CyberheistNews Vol 5 #16 Apr 21, 2015 Scam Of The Week: IRS Refund Ransomware Many of us waited till the last moment before the ...

The 5 Security Awareness Training Generations [CARTOON]

Apr 19, 2015 1:41:00 PM By Stu Sjouwerman

Today, your employees are frequently exposed to advanced phishing and ransomware attacks. Your users are the weak link in your IT security. There are 5 ways (generations) to train ...

Scam Of The Week: IRS Refund Ransomware

Apr 19, 2015 12:44:44 PM By Stu Sjouwerman

Many of us waited till the last moment before the April 15 tax deadline and are now holding our collective breath in expectation of that possibly rewarding refund. The problem is that ...

90% of phishing incidents trace back to PEBKAC and ID10T errors

Apr 19, 2015 9:43:14 AM By Stu Sjouwerman

Don't have time to read through the massive Verizon's 2015 Data Breach Investigations Report? Here is a great summary; 90% of Security incidents are still caused by PEBKAC and ID10T ...

New TeslaCrypt Ransomware Uses More Exploit Kits As Infection Vector

Apr 17, 2015 2:07:00 PM By Stu Sjouwerman

The new Internet Security Threat report from Symantec shows that the growth of file-encrypting ransomware expanded from 8,274 in 2013 to 373,342 in 2014. This is 45 times more ...

If You Think Security Awareness Training is Expensive, Try Ignorance

Apr 15, 2015 11:02:00 AM By Stu Sjouwerman

Facts surrounding spear phishing all point to employees as the most cited culprits and security awareness training as the most effective remedy. Yet all training programs are not equal. ...

CyberheistNews Vol 5 #15 Apr 14, 2015 New Ransomware CrypVault Evades AV With Simple Batch Scripts

Apr 14, 2015 9:37:00 AM By Stu Sjouwerman

New Ransomware CrypVault Evades AV With Simple Batch Scripts A new ransomware strain dubbed CRYPVAULT is being spread as an email attachment. It's beta testing in Eastern Europe and is ...

Ransomware Infects 30-PC network of health care company

Apr 13, 2015 5:08:00 PM By Stu Sjouwerman

In this Wednesday, April 1, 2015 photo, Jeff Salter, CEO of Caring Senior Service, poses for a photo in his company office building in San Antonio. Last December, the network of nearly 30 ...

Wall Street Journal Video About Ransomware and Botnets

Apr 13, 2015 2:56:00 PM By Stu Sjouwerman

Wall Street Journal Video About Ransomware and Botnets The WSJ asked itself: Who Will Cybercriminals Target Next? (click on the picture to see the video at the WSJ website). ...

So, What Is The Real Reason The White House Got Hacked?

Apr 11, 2015 9:58:00 AM By Stu Sjouwerman

According to a new CyberEdge research survey of 19 sectors, including government, spearphishing is the biggest concern to IT security pros, more worrisome than even malware. And only 20 ...

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