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

World's Biggest Cyberheist Cybergang Phished $900 Million Out Of Banks

Feb 15, 2015 9:25:00 AM By Stu Sjouwerman

More than 100 financial institutions in 30 countries have been the victim of a cyberheist that lasted in some cases almost 2 years. This was not a smash-and-grab but a highly ...

New KnowBe4 Console V4.0 Released

Feb 13, 2015 3:57:44 PM By Stu Sjouwerman

We are excited to announce Version 4.0 of the KnowBe4 console with some exciting new phishing features! Here are the two main highlights and the rest of the list is below. - Random ...

Anthem Hack Caused By A Phished System Admin?

Feb 13, 2015 10:40:01 AM By Stu Sjouwerman

The foreign hackers who stole up to 80 million records from Anthem social engineered their way into the company's network by obtaining the credentials of five tech workers. Thomas Miller, ...

Antivirus Products Are Slow at Making Malware Signatures

Feb 12, 2015 4:48:00 PM By Stu Sjouwerman

The traditional malicious software detection approach is far from being sufficient, especially in corporate environments. More and more it's found that antivirus products can take months ...

Ransomware We Have Not Seen The Worst Yet

Feb 11, 2015 4:11:58 PM By Stu Sjouwerman

The massive success of CryptoLocker starting September 2013 has spawned a number of rapidly growing ransomware families. More recent versions of this malware have learned a number of ...

Anthem Breach Began with Phishing of Employees

Feb 11, 2015 2:23:00 PM By Stu Sjouwerman

Last updated 2/12/2015 - The foreign hackers who stole up to 80 million records from Anthem social engineered their way into the company's network by obtaining the credentials of five ...

Hacked Lawyers Office Sends Phishing Attack To Customers

Feb 10, 2015 4:47:39 PM By Stu Sjouwerman

An interesting new wrinkle in phishing attacks is in the wild as we speak. A system administrator reported the following on the spiceworks forum:

Malware Hijacks Microsoft Outlook And Spreads Banking Trojan

Feb 10, 2015 10:55:00 AM By Stu Sjouwerman

I mentioned a few months ago that I expected something like this, but it has materialized faster than I expected. Trend Micro researchers discovered a new version of the Dyre banking ...

CyberheistNews Vol 5 #6 Feb 10, 2015 New Ransomware Strain Encrypts Files From RAM / Scam Of The Week

Feb 10, 2015 9:24:00 AM By Stu Sjouwerman

New Ransomware Strain Encrypts Files From RAM / Scam Of The Week Security researchers at venture-backed Invincea have discovered a new Russian ransomware strain they called "Fessleak". It ...

Spear Phishing Attack Makes $17.2 Million In Three Days

Feb 7, 2015 12:36:00 PM By Stu Sjouwerman

Corporate cybercrime on an international scale has hit one of Omaha’s biggest and oldest companies. CEO Chuck Elsea's email address was spoofed and this cost them millions because their ...

What KnowBe4 Users Say About The Service

Feb 7, 2015 11:54:00 AM By Stu Sjouwerman

Feb 6, 2015 at 3:40 PM: Cyali said: "I'll be redoing our security policy shortly, as well as spearheading a project to put together a real IT orientation as part of our onboarding process.

Brand new ransomware strain encrypts files from memory

Feb 6, 2015 2:37:00 PM By Stu Sjouwerman

Security researchers at venture-backed Fairfax, Virginia-based Invincea have discovered a new Russian ransomware strain they called "Fessleak" which delivers its malicious code straight ...

Slideshow: The Worst Of The Worst Phishing Scams

Feb 5, 2015 3:51:00 PM By Stu Sjouwerman

www.CSOonline.com provides news, analysis and research on a broad range of security and risk management topics. Areas of focus include information security, physical security, business ...

Data Breach at Health Insurer Anthem 80 million records

Feb 5, 2015 7:55:00 AM By Stu Sjouwerman

Last updated Feb 7, 2015 - Both the Wall Street Journal and cyber security blogger Brian Krebs reported that Anthem Inc., the nation’s second largest health insurer disclosed that hackers ...

CyberheistNews Vol 5 #5 Scam Of The Week: Child Predator Phishing Email

Feb 3, 2015 9:23:00 AM By Stu Sjouwerman

Scam Of The Week: Child Predator Phishing Email Just when you think phishing criminals cannot sink any further, you get confronted with a "new low". This phishing scam preys a on parent's ...

Graphics Make Phishing Attacks Work Better

Feb 2, 2015 5:29:57 PM By Stu Sjouwerman

A successful phishing attack has several elements that all together convince the victim that the email is legit and that they need to act on the message. One of these elements sems to be ...

Fake Chrome Update Phishing Email Installs Ransomware

Feb 2, 2015 4:48:48 PM By Stu Sjouwerman

Jerome Segura at MalwareBytes was the first to report about a phishing attack that uses a fake "Chrome Update" to trick end-users into installing ransomware on their workstation. So, I ...

RansomWeb: Cyber Criminals Hold Whole Website Hostage

Jan 28, 2015 4:41:27 PM By Stu Sjouwerman

Now this is a whole new wrinkle in criminal ransomware. Malicious hacker crews have started taking over whole websites, injecting some code to file-by-file first encrypt and then decrypt ...

Scam Of The Week Child Predator Phishing Scam

Jan 28, 2015 3:07:00 PM By Stu Sjouwerman

Child Predator Phishing Scam Preys On Parents Fears Please send a link to this blog post to your friends and family right away?

CyberheistNews Vol 5 #4 Jan 27, 2015 Scam Of The Week: LinkedIn Support Phishing Emails

Jan 27, 2015 9:31:00 AM By Stu Sjouwerman

Scam Of The Week: LinkedIn Support Phishing Emails The scam is at least 15 years old if not more, but unfortunately this type of social engineering still works. Remind your users one more ...

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