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

It's heeere! Criminal Ransomware as a Service

May 28, 2015 9:56:00 AM By Stu Sjouwerman

As we predicted in our whitepaper "Your Money or Your Life/Files", there is now shake-and-bake criminal ransomware that aspiring Internet criminals can put together in a few minutes. Meet ...

The Information Security Policy Trap

May 27, 2015 9:42:32 AM By Stu Sjouwerman

InfoSec genius Ben Tomhave wrote: "It's that time of year again: time to update the policies! This annual exercise is always a source of great enjoyment for me (no, not really). After ...

Is Your Network Infected With Sleeper Ransomware?

May 26, 2015 6:11:00 PM By Stu Sjouwerman

This is a concerning new "sleeper" ransomware twist.

Will Your Contractors Take Down Your Business?

May 26, 2015 11:07:22 AM By Stu Sjouwerman

Will Your Contractors Take Down Your Business? Do you know how well your vendors, business associates, contracted third parties (who I will collectively call “contractors”) are protecting ...

CyberheistNews Vol 5 #20 Adult Friend Finder Hack Is Nightmare Phishing Problem

May 26, 2015 9:18:00 AM By Stu Sjouwerman

Adult Friend Finder Hack Is Nightmare Phishing Problem Guys, we have a real phishing problem with this Adult Friend Finder (AFF) hack. This particular adult site is one of the most ...

Adult Friend Finder Hack Is Nightmare Phishing Problem

May 23, 2015 10:21:00 AM By Stu Sjouwerman

Guys, we have a real phishing problem with this Adult Friend Finder (AFF) hack. This particular adult site is one of the most heavily-trafficked websites in the U.S. and has 40 million ...

Researchers Observe SVG Files Being Used To Distribute Ransomware

May 23, 2015 8:04:00 AM By Stu Sjouwerman

Researchers with AppRiver have observed attackers sending out phishing emails with SVG files attached – these files, when downloaded and executed, open up websites that download what ...

CyberheistNews Vol 5 #19 Scam Of The Week: Red Bull Money Mule Victims

May 19, 2015 8:58:32 AM By Stu Sjouwerman

Scam Of The Week: Red Bull Money Mule Victims Warn your employees, friends and family about a cunning money laundering scam that is currently back on the rise. This lure was first used ...

This Week's Five Most Popular HackBusters Posts 5/17/2015

May 17, 2015 12:36:00 PM By Stu Sjouwerman

What are IT security people talking about? Here are this week's five most popular hackbusters posts: 1) Feds Say That Banned Researcher Commandeered a Plane: ...

Starbucks Hack: A Great Example Why You Should Not Reuse Passwords

May 17, 2015 11:58:00 AM By Stu Sjouwerman

Use this story and send it to your employees as a cautionary tale to make it real to them they should not reuse passwords in general, but especially not for any online payment accounts! ...

Heads-up: 'Breaking Bad' Ransomware Beta Tested Down Under

May 16, 2015 5:57:00 PM By Stu Sjouwerman

You can expect ransomware in America in the next few weeks which has a Breaking Bad theme. Take this a bit further and we can expect ransomware with Halloween themes later this year. ...

Scam Of The Week: Red Bull Money Mule Victims

May 16, 2015 9:15:00 AM By Stu Sjouwerman

Warn your employees, friends and family about a cunning money laundering scam that is currently back on the rise. This lure was used during spring break in 2014 and apparently successful ...

Has Anyone Used KnowBe4?

May 16, 2015 8:56:00 AM By Stu Sjouwerman

May 14, 2014 7:45 AM BruceyBonus asked the following question at the SpiceWorks Security Forum: "Hi All, been in contact with a company called Knowbe4, they offer a simulated phishing ...

Get Real About User Security Training

May 12, 2015 10:13:00 AM By Stu Sjouwerman

Do you despair that users will never learn to avoid stupid security mistakes that compromise your organization? Maybe you're not spending enough time and effort on training. Roger Grimes ...

CyberheistNews Vol 5 #18 May 12, 2015 How New Phishing Malware Rombertik Kills Your Hard Drives

May 12, 2015 8:54:00 AM By Stu Sjouwerman

CyberheistNews Vol 5 #18 May 12, 2015 How New Phishing Malware Rombertik Kills Your Hard Drives InfoSec researchers at Cisco's TALOS group discovered a strain of malware that spreads ...

Phishing in the C-Suite: 96% of Executives Vulnerable to Attacks

May 11, 2015 9:50:36 AM By Stu Sjouwerman

According to a recent survey, 96% of executives failed to tell the difference between a real email and a phishing email 100% of the time.

Credit Union Times: Ransomware, WordPress Threats Grow

May 10, 2015 10:48:00 AM By Stu Sjouwerman

At 27%, banks and credit unions are the largest segment of KnowBe4's customers, obviously because they are the bad guys' #1 target. Thing is, banks and credit unions found us, we did not ...

How Phishing Malware Rombertik Kills Your Hard Drives

May 9, 2015 1:20:00 PM By Stu Sjouwerman

InfoSec researchers at Cisco's TALOS group discovered a strain of malware that spreads through phishing. Attackers use social engineering tactics to entice users to download, unzip, and ...

What our customers are saying about our security awareness training

May 7, 2015 10:49:00 AM By Stu Sjouwerman

One of our customers sent us this today: "I wanted to give you an update on our security awareness training. When we did the baseline phishing campaign for 85 employees and we had a click ...

CyberheistNews Vol 5 #18 May 5, 2015 Your Antivirus Enduser Is Exposed To Phishing Attacks For 17.5 Hours

May 5, 2015 8:48:30 AM By Stu Sjouwerman

CyberheistNews Vol 5 #18 May 5, 2015 Your Antivirus Enduser Is Exposed To Phishing Attacks For 17.5 Hours The 2015 Websense threat report is abundantly clear about it. "Websense detected ...

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