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

Police Pay Ransom After Ransomware Phishing Attack

Apr 6, 2015 11:09:47 AM By Stu Sjouwerman

TEWKSBURY – Last December Tewksbury Police confronted a new, and growing, frontier in cyberterrorism when the CryptoLocker ransomware virus infected the department’s network, encrypting ...

10 Hacking Facts / How They Impact You [Infographic]

Apr 4, 2015 12:01:41 PM By Stu Sjouwerman

Cybersecurity is one of the most pressing concerns for business and consumers, especially when it comes to social media. So much personal identifiable information (PII) exists across the ...

IBM: 'Dyre Wolf' Cyber Gang Uses Spear Phishing For $1 Million Cyberheists

Apr 4, 2015 10:48:00 AM By Stu Sjouwerman

Last week, IBM Security reported on an active cyberheist campaign using a variant of the Dyre Trojan that has successfully stolen more than $1 million at a time from targeted enterprise ...

NEW: This Week's Five Most Popular HackBusters Posts #2

Apr 4, 2015 9:24:24 AM By Stu Sjouwerman

There is an enormous amount of noise in the security space, so how do you know what people really talk about and think is the most important topic? Well, we created the Hackbusters site ...

KnowBe4 First Quarter 2015

Apr 3, 2015 9:41:08 AM By Stu Sjouwerman

Our first quarter knocked it out of the park. Normally Q4 is the highest quarter in the year, but we eclipsed last year's Q4 handsomely. Year-over-year, Q1 of 2015 was 354 percent over Q1 ...

ALERT: New Ransomware Spearphish Uses One-Click Dropbox Attack

Mar 30, 2015 8:47:00 AM By Stu Sjouwerman

The cyber-mafia is stepping up the pressure. As you know, there are several competing gangs that are furiously innovating in an attempt to grab as much money as possible. Call it a ...

NEW: This Week's Five Most Popular HackBusters Posts

Mar 29, 2015 10:00:29 AM By Stu Sjouwerman

There is an enormous amount of noise in the security space, so how do you know what people really talk about and think is the most important topic? Well, we created the Hackbusters site ...

Scam Of The Week: 911 Phone Threat

Mar 28, 2015 2:00:00 PM By Stu Sjouwerman

Residents in Ohio are being "beta tested" by cybercrime for a scam that will inevitably also hit all other states. Here is your Scam Of The Week heads-up. This particular scam will also ...

35 percent of Kansas City Employees Turn Out Phish-prone

Mar 28, 2015 1:16:45 PM By Stu Sjouwerman

From the Kansas City Star: Would-be hackers duped 35% of Kansas City employees into opening the door to municipal computer systems sometime in the last six months, a city audit report ...

RANT: Renewing Office 365 Online D(H)ell

Mar 28, 2015 12:07:00 PM By Stu Sjouwerman

OK, buying a new Dell machine 12 months ago I decided to get a subscription to Office 365. For about a year everything ran fine, but then I started to get warning messages in the apps ...

Experts: Social Engineering Attacks Harder To Stop

Mar 28, 2015 10:42:45 AM By Stu Sjouwerman

Michael Heller at TechTarget wrote a good longish article where he concluded: "As more personal and corporate information is shared on the Web, social engineering techniques and attacks ...

CyberheistNews Vol 5 #12 Why Your Brain Shuts Down When You See A Security Alert

Mar 24, 2015 9:20:00 AM By Stu Sjouwerman

"ALERT: New Ransomware Spear Phish Uses One-Click Dropbox Attack The cyber-mafia is stepping up the pressure. As you know, there are several competing gangs that are furiously innovating ...

How to get your Phish-prone percentage up. Up? Yes, Up.

Mar 23, 2015 11:14:00 AM By Stu Sjouwerman

Something surprising happened last week. A few of our customers reported that their phish-prone percentage was going up. Up? Yes, up. Not something you normally would expect or ...

Premera And Anthem Both Hacked Using Shrewd Social Engineering

Mar 21, 2015 10:11:41 AM By Stu Sjouwerman

Health records are the new credit cards. They have a longer shelf life and are often easier to get. There are more opportunities for fraud. No wonder that bad guys are after them with a ...

Why your brain shuts down when you see a security alert

Mar 21, 2015 9:28:56 AM By Stu Sjouwerman

Been mystified why end-users do not seem to get it? Their eyes glazing over when a security alert pops up on their screen? Brand new neuroscience research using MRI shows a dramatic drop ...

China Finally Admits It Has A Hacker Army

Mar 20, 2015 2:45:00 PM By Stu Sjouwerman

China finally admits it has special cyber warfare units — and a lot of them. This is the "advanced persistent threat" cyber security experts have been pointing to.

Despite Mobile App Risks Enterprise Does Not Have Mobile Security Policy

Mar 20, 2015 1:43:33 PM By Stu Sjouwerman

Here is the disconnect: 82 percent of IT pros think that BYOD in the workplace has “very significantly” or “significantly” increased IT security risks, less than half of organizations ...

Banking Regulator Issues New Phishing Alert

Mar 19, 2015 5:21:00 PM By Stu Sjouwerman

The National Credit Union Administration, (NCUA) warns netizens about phishing emails containing links to a fraudulent website that resembles the NCUA are being pushed to consumers.

Security experts say law firms are perfect targets for hackers

Mar 19, 2015 4:38:30 PM By Stu Sjouwerman

Susan Hansen at Bloomberg business reported that cyber attacks upend the attorney-client privilege.

Ransomware: Pay Up Or Fight. What Would You Do?

Mar 17, 2015 5:23:22 PM By Stu Sjouwerman

Ask security experts what to do when hit with ransomware -- the sophisticated malware that infects a device or network, uses military-grade encryption to restrict access, and demands ...

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