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

Scam Of The Week: Comcast Triple Threat

Dec 19, 2015 9:26:55 AM By Stu Sjouwerman

You are probably aware that Comcast is the largest home ISP in the U.S. and that they also have many thousands of business users. No wonder they are the target of a sophisticated social ...

Major TeslaCrypt Ransomware Offensive Underway

Dec 16, 2015 1:17:59 PM By Stu Sjouwerman

This month, Symantec researchers reported a boost in TeslaCrypt attacks, going from 200 a day to 1,800. TeslaCrypt first appeared in March 2015, and differentiated itself because many of ...

Data Breach Caused By Phishing Results in $750,000 HIPAA Penalty

Dec 16, 2015 11:26:50 AM By Stu Sjouwerman

Federal regulators have hit the University of Washington Medicine with a $750,000 penalty and a corrective action plan as part of a HIPAA settlement after a 2013 malware-related breach ...

CyberheistNews Vol #5 #53 Despite Warnings, CEO Fraud Scams Still Successful And Growing

Dec 15, 2015 9:59:30 AM By Stu Sjouwerman

In the last few months, law enforcement has warned repeatedly about a new scam that is rapidly expanding. The FBI calls it "Business Email Compromise" (BEC), but it is better known as ...

Kaspersky Sees Ransomware Doubling Year Over Year

Dec 14, 2015 4:44:18 PM By Stu Sjouwerman

Antivirus company Kaspersky has been monitoring ransomware pretty much from the get-go. Not surprising, as they are in Moscow and the main ransomware malware developers are Russian as ...

Despite Warnings, CEO Fraud Scams Still Successful And Growing

Dec 13, 2015 10:43:08 AM By Stu Sjouwerman

In the last few months, law enforcement has warned repeatedly about a new scam that is rapidly expanding. The FBI calls it "Business Email Compromise" (BEC), but it is better known as " ...

CyberheistNews Vol #5 #52 Scam Of The Week: Apple ID Suspension Phish With A Twist

Dec 8, 2015 9:45:54 AM By Stu Sjouwerman

OK, this scam is widespread enough to alert your users about it. The email claims to be from Apple Support and says your Apple ID and iCloud are both going to be suspended because you did ...

Scam Of The Week: Apple ID Suspension Phish With A Twist

Dec 5, 2015 3:07:08 PM By Stu Sjouwerman

OK, this scam is widespread enough to alert your users about. The email claims to be from Apple Support and both your Apple ID and iCloud are going to be suspended because you did not ...

The Top 5 Reasons To Invest In Cyber Security

Dec 5, 2015 9:59:21 AM By Stu Sjouwerman

Here's a quick condensed overview, which you can use as bullet points in your 2016 budget discussion. Today, successful data breaches happen on a daily basis. The frequency of the attacks ...

CyberheistNews Vol #5 #51 Hated Cryptowall 4.0 Now Infects Workstations with Powerful Exploit Kit

Dec 1, 2015 9:34:49 AM By Stu Sjouwerman

Earlier than expected - but similar to Cryptowall 3.0 - a few weeks after its release, the hated Cryptowall 4.0 ransomware is now being delivered via the Nuclear Exploit Kit (NEK), ...

Cryptowall 4.0 Delivered via Nuclear Exploit Kit

Nov 27, 2015 10:13:17 AM By Stu Sjouwerman

Earlier than expected - but similar to Cryptowall 3.0 - a few weeks after its release, Cryptowall 4.0 ransomware is now delivered via the Nuclear Exploit Kit, (NEK) according to the ...

CyberheistNews Vol #5 #50 When Your Corporate Culture Frowns On Mock Phishing Attacks

Nov 24, 2015 8:41:51 AM By Stu Sjouwerman

Now and then, when I talk to the IT people in larger organizations, they tell me they experience political headwinds in trying to get an awareness program rolled out that includes ...

2016 Will Show Increase In Shareholder Cybersecurity Lawsuits

Nov 22, 2015 7:34:05 AM By Stu Sjouwerman

NYSE Governance Services and Infosec company Veracode recently published results of a survey over of 276 board members titled "Cybersecurity and Corporate Liability". A massive 60 percent ...

When Your Corporate Culture Frowns On Mock Phishing Attacks

Nov 21, 2015 11:23:16 AM By Stu Sjouwerman

Now and then, when I talk to the IT people in larger organizations, they tell me they experience political headwinds in trying to get an awareness program rolled out that includes ...

[INFOGRAPHIC] The Top 5 Holiday Scams To Warn Your Users About

Nov 19, 2015 5:37:34 PM By Stu Sjouwerman

There are certain holiday scams we tend to see year after year. This infographic is great to share with your users to help them make smarter security decisions!

Ransomware News Roundup November 2015

Nov 17, 2015 5:42:21 PM By Stu Sjouwerman

DecryptorMax 24-hour deadline Ransomware strains use different ways to pressure victims into paying, varying from 7 days after which the ransom doubles, to threatening to publish files on ...

CyberheistNews Vol #5 #49 The Top 5 Holiday Scams To Warn Your Users About

Nov 17, 2015 9:28:19 AM By Stu Sjouwerman

This holiday season could be the most wonderful time of year for cyber criminals, according to digital identity company ThreatMetrix. In a new report, the firm reveals that it has ...

ISIS "Celebrates" Paris With Video - Inoculate Users Against Phishing Attacks

Nov 16, 2015 11:15:26 AM By Stu Sjouwerman

OK, bad news first. The world is shocked and angry about the attacks in Paris. That often causes emotional reactions, which the bad guys on the Internet are exploiting. ISIS has released ...

KnowBe4 and Kevin Mitnick Featured in USA Today Cybersecurity Supplement

Nov 13, 2015 10:36:35 AM By Stu Sjouwerman

We recently participated in USA Today's “Cyber Security” campaign that aims to encourage readers to recognize the importance of cyber security in their personal, financial and business ...

How to Phish Your Own Users And Why

Nov 12, 2015 10:29:40 AM By Stu Sjouwerman

Over the last few years, thousands of organizations in the U.S have started to phish their own users. IT pros have realized that doing this is urgently needed as an additional security ...

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