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

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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 ...

Ransomware Infection Causes Loss of 8 Years Of Police Department Evidence

Jan 27, 2017 11:24:58 AM By Stu Sjouwerman

The Police Department in Cockrell Hill, Texas released in a press release that they lost 8 years worth of evidence after the department's server was infected with ransomware.

CyberheistNews Vol 7 #4 [ALERT] USB Sticks Could Infect Your Network With New Spora Ransomware Worm

Jan 24, 2017 9:54:53 AM By Stu Sjouwerman

[ALERT] USB Sticks Could Infect Your Network With New Spora Ransomware Worm

Jan 22, 2017 8:09:14 AM By Stu Sjouwerman

The new Spora ransomware strain has now been dissected by more malware researchers and the team from G Data discovered that Spora uses an "innovative" way to spread itself via USB sticks. ...

CyberheistNews Vol 7 #3 Bad News: Your Antivirus Detection Rates Have Dramatically Declined in 12 Months

Jan 17, 2017 9:37:24 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

Bad News: Your Antivirus Detection Rates Have Dramatically Declined In 12 Months

Jan 15, 2017 9:05:58 AM By Stu Sjouwerman

We all had the nagging suspicion that antivirus is not cutting it anymore, but the following numbers confirm your intuition. I have not seen more powerful ammo for IT security budget to ...

Scam Of The Week: IRS Issues Warning On New Tax Phishing Attack

Jan 14, 2017 11:31:04 AM By Stu Sjouwerman

It's unbelievable, but the new tax season is around the corner and the bad guys are already at it. This is a two-phase phishing scam of the week you need to watch out for: PHASE 1: ...

Sophisticated "Spora" Ransomware Demands Future Protection Money

Jan 12, 2017 7:40:51 AM By Stu Sjouwerman

Emsisoft researchers dissected a new ransomware strain that demands users not only pay to recover their encrypted files, but also for immunity from future attacks. The threat is called ...

CyberheistNews Vol 7 #2 Heads-Up! Massive New Locky Ransomware Attack Is Coming

Jan 10, 2017 10:29:56 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

300+ New Ways to Stop Your Users from Clicking on Everything!

Jan 10, 2017 10:00:00 AM By Stu Sjouwerman

You now really have 300+ new ways to make sure your users Think Before They Click!

I Don't Need No Friggen Backup Plan For Ransomware

Jan 10, 2017 7:16:14 AM By Stu Sjouwerman

Did I get your attention? The picture here raised my eyebrows, because of its patent nonsense. Elizabeth Holmes stated this in an interview about being an entrepreneur. It's a bit like ...

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Stu Sjouwerman

Books

Recent Posts

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

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

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

Campbell County Health Falls Victim To W-2 CEO Fraud

Sedgwick County Loses $566,000 Due To CEO Fraud

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

Why You Should Be Afraid of CEO Fraud [INFOGRAPHIC]

Russia Arrests Kaspersky Exec and FSB Spook

New York DFS Cybersecurity Regulation FAQ And Security Awareness Training

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

Ransomware Infection Causes Loss of 8 Years Of Police Department Evidence

CyberheistNews Vol 7 #4 [ALERT] USB Sticks Could Infect Your Network With New Spora Ransomware Worm

[ALERT] USB Sticks Could Infect Your Network With New Spora Ransomware Worm

CyberheistNews Vol 7 #3 Bad News: Your Antivirus Detection Rates Have Dramatically Declined in 12 Months

Bad News: Your Antivirus Detection Rates Have Dramatically Declined In 12 Months

Scam Of The Week: IRS Issues Warning On New Tax Phishing Attack

Sophisticated "Spora" Ransomware Demands Future Protection Money

CyberheistNews Vol 7 #2 Heads-Up! Massive New Locky Ransomware Attack Is Coming

300+ New Ways to Stop Your Users from Clicking on Everything!

I Don't Need No Friggen Backup Plan For Ransomware

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