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

A new "long con" Scam Of The Week: Binary Options

Sep 20, 2016 7:54:59 AM By Stu Sjouwerman

Most scams on the internet are "short con" scams, compare them to hit & run. However, "long con" scams have started to show up that can take a few months to finally steal the money. ...

Investment fund loses $6 million in CEO Fraud and shuts down

Sep 19, 2016 12:59:43 PM By Stu Sjouwerman

CNBC reported some pretty stunning breaking news. I cannot come up with a better case for new-school security awareness training for employees in accounting and HR. A lawsuit filed on ...

CyberheistNews Vol 6 #38 [ALERT] FBI Warns Ransomware Attacks Are Getting More Dangerous And Expensive

Sep 19, 2016 9:50:09 AM By Stu Sjouwerman

*|CyberHeistNews|* CyberheistNews Vol 6 #38 [ALERT] The FBI Warns That Ransomware Attacks Are Getting More Dangerous And Expensive In an alert published this week, the U.S. Federal Bureau ...

McAfee: Ransomware Has Grown 128 Percent Over 2015

Sep 17, 2016 5:01:49 PM By Stu Sjouwerman

Intel Security's McAfee Labs Threat Report for September 2016 provides insight into the latest security statistics and trends, ranging from botnets to ransomware to malware "zoos." Large ...

Meet Mamba: New Full Disk Encryption Ransomware

Sep 17, 2016 8:06:13 AM By Stu Sjouwerman

SecurityAffairs just published a new discovery that you need to know about. A Brazilian Infosec research group, Morphus Labs, just discovered a new Full Disk Encryption (FDE) ransomware ...

[ALERT] FBI Warns Ransomware Attacks Get More Targeted And Expensive

Sep 16, 2016 4:13:34 PM By Stu Sjouwerman

In an alert published today, the U.S. Federal Bureau of Investigation (FBI) warned that recent ransomware variants have targeted and compromised vulnerable business servers (rather than ...

New Vicious And Highly Targeted Ransomware Attacks Made Public

Sep 16, 2016 10:36:57 AM By Stu Sjouwerman

Here’s an example of a highly targeted ransomware attack, with bad guys using a phony Bank of Montreal (BMO) template to social engineer possible victims into clicking on a malicious ...

A Single Ransomware Gang Made $121M In 2016

Sep 14, 2016 11:31:44 AM By Stu Sjouwerman

Intel Security today released its McAfee Labs Threats Report: September 2016, which assesses the growing ransomware threat; surveys the “who and how” of data loss; explains the practical ...

Targeted Lawsuit Phishing Attack With Sophisticated Payload

Sep 13, 2016 4:11:55 PM By Stu Sjouwerman

We are seeing a big phishing wave with a social engineering attack that threatens with a personalized lawsuit using the domain name of the targeted victim. This is an interesting payload ...

Adding Insult To Injury: The Ginsu Knives Approach To Ransomware

Sep 12, 2016 5:27:54 PM By Stu Sjouwerman

Kaspersky has a fascinating blog post on a new strain of ransomware called RAA that is not only fairly sophisticated, but incredibly abusive:

CyberheistNews Vol #6 #37 Scam Of The Week: A New Type Of Tech Support Fraud

Sep 12, 2016 9:42:39 AM By Stu Sjouwerman

Seagate Sued By Own Employees For CEO Fraud Attack

Sep 12, 2016 7:48:16 AM By Stu Sjouwerman

Hard drive manufacturer Seagate was sued by its own employees as the result of a successful CEO fraud attack where all the personal information of 10,000 existing and former employees ...

Philadelphia Ransomware Strain Offers "Mercy" Button

Sep 12, 2016 7:22:41 AM By Stu Sjouwerman

Larry Abrams at Bleepingcomputer reported on a new strain that raises some eyebrows. "A new version of the Stampado ransomware called Philadelphia has started being sold for $400 USD by a ...

Scam Of The Week: A New Type Of Tech Support Fraud

Sep 11, 2016 10:17:41 AM By Stu Sjouwerman

We spotted an unusual phishing email which revealed a new scam your users will soon find in their inbox. Time to inoculate them before it becomes a problem! Many online service providers ...

Having some Phun With Phishers - CEO Fraud Blow-By-Blow

Sep 10, 2016 11:01:39 AM By Stu Sjouwerman

For the last 9 years I have been a board member of the public/private Clearwater Downtown Partnership. And as many public organizations, all the board member information is freely ...

"But, But, But... I Didn't Click!" False Positives In Phishing Tests

Sep 10, 2016 9:55:51 AM By Stu Sjouwerman

The following question was posted in the SANS Securing The Human forum. I thought it was a very good point and asked our VP Product Greg Kras for his perspective. First the question:

Funny Phishing Story: Your Online Order Receipt

Sep 10, 2016 9:21:34 AM By Stu Sjouwerman

A customer sent us this: Hi, I wanted to share with you a funny story…. My boss calls me into her office, very serious like. She sits me down and asks “Did you use the company credit card ...

KnowBe4 Is Hiring: QA Engineer and Sr Ruby Developer

Sep 9, 2016 11:49:56 AM By Stu Sjouwerman

Hi All, KnowBe4 is looking for a few good people. Specifically we are hiring a QA Engineer and a Senior Ruby Developer. Know anyone? Send them to our Jobs page on the website. KnowBe4 is ...

Coming Soon to an Inbox Near You: A New Type Of Tech Support Scam

Sep 9, 2016 7:29:48 AM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher. Yesterday we spotted an unusual phishing email that we'd like to share with readers. If nothing else, it tells us that the increased ...

Tampa FBI: Your business is going to get hacked (or get infected with ransomware)

Sep 7, 2016 8:55:53 AM By Stu Sjouwerman

The Tampa Bay Business Journal published an interview with FBI Special Agent Lawrence Wolfenden. Wolfenden is a 25-year veteran of the FBI, the lead agency for investigating cyber attacks ...

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