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

Google: "Office Inbox Receives 6.2X More Phishing And 4.3X More Malware Than Your Inbox At Home".

Feb 17, 2017 8:26:44 PM By Stu Sjouwerman

Google Research analyzed over a billion emails passing through Gmail, and the results were presented yesterday at the RSA security conference in San Francisco. Extremely interesting ...

CyberheistNews Vol 7 #7 [ALERT] DynA-Crypt Ransomware Steals and Deletes Your Data

Feb 13, 2017 9:42:33 AM By Stu Sjouwerman

[Heads-Up] First-Ever Russian Malicious Mac Macro Discovered

Feb 12, 2017 9:31:25 AM By Stu Sjouwerman

Appleinsider reported Feb 9, 2017: "Mac malware discovered in Microsoft Word document with auto-running macro", which was the second example of malware targeting macOS users this week. ...

Scam Of The Week: Valentine’s Day Phishing Attacks

Feb 11, 2017 3:11:31 PM By Stu Sjouwerman

It is time to remind your users that heartless con artists use social engineering tactics to trick people looking for love. The FBI's Internet Crime Complaint Center warns every year that ...

[ALERT] DynA-Crypt Ransomware Steals And Deletes Your Data

Feb 11, 2017 10:52:17 AM By Stu Sjouwerman

Our friend Larry Abrams at Bleepingcomputer alerted the world about a new strain of ransomware called DynA-Crypt that was put together using a malware creation kit by people that are not ...

CRYSIS Ransomware Is Back And Uses RDP Brute Force To Attack U.S. Healthcare Orgs

Feb 11, 2017 9:53:56 AM By Stu Sjouwerman

Remember the CRYSIS ransomware? The attacks started up again, mostly targeting US healthcare orgs. using brute force attacks via Remote Desktop Protocol (RDP). The number of attacks has ...

How Hacking Became Russia’s Weapon of Choice

Feb 9, 2017 7:21:10 AM By Stu Sjouwerman

A study by the World Bank stated that Russia boasts more than 1 million software specialists involved in research and development. Russian illegal cyber warriors are among the most ...

CyberheistNews Vol 7 #6 [IRS ALERT] Scam of the Week Blends CEO Fraud and W-2 Phishing

Feb 7, 2017 9:49:48 AM By Stu Sjouwerman

KnowBe4 Introduces New “Social Engineering Indicators” Training Method

Feb 7, 2017 8:50:07 AM By Stu Sjouwerman

Today, we are introducing a new training method that IT managers can use to better manage the continually increasing social engineering threats. Social Engineering Indicators (SEI) turns ...

Fake Netflix App Is Actually Ransomware

Feb 5, 2017 8:53:53 AM By Stu Sjouwerman

Kaspersky warned on their blog: "People are downloading a new app, looking to get free access to Netflix accounts. What they’re actually getting is a malware strain called Netix that ...

Careless Licking Gets A Nasty Ransomware Phishing Infection: 1,000+ Machines Down

Feb 4, 2017 9:40:14 AM By Stu Sjouwerman

More than 1,000 government computer systems shut down. A county in Ohio, US, has had to shut down its entire IT infrastructure due to a ransomware infection. County Auditor Mike Smith ...

Scam Of The Week Blends CEO Fraud And W-2 Phishing

Feb 3, 2017 7:33:39 AM By Stu Sjouwerman

I have talked about CEO fraud here many times — e-mail attacks spoofing the boss and social engineering a high-risk employee into wiring funds to a bank account controlled by the bad ...

Cisco: "Spam makes major comeback. Users are your last line of defense".

Feb 1, 2017 7:39:42 AM By Stu Sjouwerman

Whoa Nellie. Just when you thought that spam was on its way out, Cisco’s 2017 Annual Cybersecurity Report shows the opposite. Spam is making a surprising comeback as a threat to your ...

Campbell County Health Falls Victim To W-2 CEO Fraud

Jan 30, 2017 5:06:52 PM By Stu Sjouwerman

And another one. You have to watch it, the tax scam season is back in full swing. Full W-2 information including SSN# for more than 1,400 employees who worked over the past year at ...

Sedgwick County Loses $566,000 Due To CEO Fraud

Jan 30, 2017 4:46:45 PM By Stu Sjouwerman

WICHITA, Kansas - A Georgia man has been arrested on federal charges he carried out an e-mail spoofing scheme that cost Sedgwick County $566,000. George S. James, 48, Brookhaven, Ga., is ...

CyberheistNews Vol 7 #5 Ransomware Infection Causes Loss of 8 Years of Police Department Evidence

Jan 30, 2017 9:43:16 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

Why You Should Be Afraid of CEO Fraud [INFOGRAPHIC]

Jan 27, 2017 5:00:27 PM By Stu Sjouwerman

Russia Arrests Kaspersky Exec and FSB Spook

Jan 27, 2017 4:16:31 PM By Stu Sjouwerman

Russian authorities have arrested Sergei Mikhailov, deputy chief at the FSB's Information Security Center (CDC), and Kaspersky exec Ruslan Stoyanov on charges of treason. Mikhailov has ...

New York DFS Cybersecurity Regulation FAQ And Security Awareness Training

Jan 27, 2017 1:48:08 PM By Stu Sjouwerman

In New York, a new cybersecurity regulatory regime will go into effect March 1st 2017. The proposed cybersecurity regulation, known as 23 NYCRR 500, has grabbed the attention of companies ...

Ransomware attacks quadrupled in 2016, expected to double again in 2017

Jan 27, 2017 11:50:41 AM By Stu Sjouwerman

The number of ransomware attacks quadrupled in 2016 and are expected to double again in 2017, according to findings in a report from large insurer Beazley. They suggested that ...

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