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

These 500 Million Hacked Yahoo Accounts Are A Phishing Paradise. Warn Your Users!

Sep 23, 2016 7:55:54 AM By Stu Sjouwerman

It's all over the press. Here is a quote from Reuters: "Yahoo Inc said on Thursday information associated with at least 500 million user accounts was stolen from its network in 2014 by ...

New Version of iSpy Trojan Steals Your Software Licenses

Sep 22, 2016 3:59:43 PM By Stu Sjouwerman

Earlier this year we posted about Jsocket, a highly malicious Trojan that we spotted being delivered through phishing emails shared with us via the Phish Alert Button (PAB). Although ...

Scam Of The Week: Apple Store Phishing Attack Goes For Whole Enchilada

Sep 21, 2016 4:49:55 PM By Stu Sjouwerman

Phishing attacks using false Apple Store email messages, fake landing pages and sometimes fake login pages are still a very popular attack vector. They still make it through all the ...

Bad Guy FAIL! or, When a Simple Credentials Phish Goes Horribly Wrong

Sep 21, 2016 1:49:22 PM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher. Anyone who works a job in the computer security industry inevitably develops a kind of dark appreciation for the mad skills so often ...

As Neutrino takes a hit, RIG Exploit Kit jumps at the opportunity and spreads ransomware

Sep 21, 2016 8:05:28 AM By Stu Sjouwerman

Andra Zaharia (the picture is really her) from the Danish Heimdal Security wrote something interesting this morning that I thought you'd like to know:

Reported Phishes of the Week

Sep 20, 2016 3:58:20 PM By Stu Sjouwerman

KnowBe4's Templates Mistress Katie has been busy again adding a new batch of phishing templates to the collection of "System Templates" available to active subscribers.

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 ...

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