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

CyberheistNews Vol 5 #24 Scam Of The Week: Resume Ransomware & The Truth About The OPMgate Hack

Jun 16, 2015 8:15:00 AM By Stu Sjouwerman

CyberheistNews Vol 5 #24 June 16, 2015 Scam Of The Week: Resume Ransomware The SANS InfoSec Forums noted that since Monday May 25th new CryptoWall 3.0 ransomware attacks started, using ...

Gone phishing: How I taught my users to stop clicking everything

Jun 13, 2015 11:24:03 AM By Stu Sjouwerman

Familiar with SpiceWorks? It's the world's largest IT Admin community. One user wrote the 392nd entry in their Spotlight on IT. This is the story. There is a link at the end to the ...

The Truth About The Massive OPMgate Hacking Scandal

Jun 13, 2015 9:17:00 AM By Stu Sjouwerman

The recent U.S. Government Office of Personnel Management hack is getting worse by the day. In Saturday's Wall Street Journal they revealed that apart from more than 4 million personal ...

Annoying New Ransomware Attack Uses Girl Resumes

Jun 12, 2015 4:22:00 PM By Stu Sjouwerman

The SANS InfoSec Forums noted that since Monday May 25th a new version of CryptoWall 3.0 ransomware started, using both malicious spam and the Angler exploit kit (EK). The attack wave has ...

CyberheistNews Vol 5 #23 How The NSA Killed Internet Security in 1978 & Scam Of The Week

Jun 9, 2015 8:58:17 AM By Stu Sjouwerman

CyberheistNews Vol 5 #23 June 9, 2015 How The NSA Killed Internet Security in 1978 & Scam Of The Week Need to get ammo for your IT security budget, but the people holding the purse ...

Ransomware Victim Gets Discount From Cybercriminal

Jun 8, 2015 1:41:34 PM By Stu Sjouwerman

Researchers at Check Point discovered a new Russian ransomware strain that allows the victim to communicate with the cybercriminals who are open to providing discounts to decrypt the ...

How The NSA Killed Internet Security in 1978

Jun 8, 2015 9:43:00 AM By Stu Sjouwerman

Here is a very short summary of Internet security which explains why the current version of the Internet is not secure. It was not built securely from day one because the NSA objected to ...

Scam Of The Week: "Your Data Was Hacked, How To Protect Yourself"

Jun 7, 2015 7:05:00 PM By Stu Sjouwerman

It is all over the news, The 4-million Federal Employee OPM database was hacked and lots of employee information leaked to probably the Chinese. This weekend on CNN they said that the ...

CyberheistNews Vol 5 #22 ALERT: Is Your Network Infected With A Sleeper Ransomware Strain?

Jun 2, 2015 9:37:30 AM By Stu Sjouwerman

CyberheistNews Vol 5 #22 June 2, 2015 ALERT: Is Your Network Infected With A Sleeper Ransomware Strain? There is a concerning new "sleeper" ransomware twist. It's called Locker and has ...

Are there free ransomware decryption tools?

May 30, 2015 10:48:20 AM By Stu Sjouwerman

JP Buntix wrote: "Two types of ransomware making headlines all across the world in recent months are called CryptoLocker and CoinVault. Both types of ransomware operate in the same way, ...

Some Interesting Security Awareness Computer-Based Training Numbers

May 30, 2015 9:37:00 AM By Stu Sjouwerman

You may know Gartner, the 800-pound gorilla in the IT Analyst space. When a market is mature enough they create their so-called Magic Quadrant (MQ) with the leading vendors in that ...

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: ...

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