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

$20 Million Stolen in Cyberheists from SMEs, Money Sent to China

Apr 29, 2011 8:59:58 AM By Stu Sjouwerman

The FBI reported this week that between March 2010 and April 2011, cyberthieves drained approximately $20 million from the accounts of US-based small to medium enterprises (SMEs) via ...

77 Million Network Accounts for Sony PlayStation Compromised by Daring Cybercrime

Apr 27, 2011 8:59:15 AM By Stu Sjouwerman

This morning the news is ablaze with reports of a hack into Sony's PlayStation Network, with numerous media outlets proclaiming that as many as 77 million customer accounts have been ...

Inside the "Phishing Mindset" That Drives Cybercrime

Apr 25, 2011 8:55:16 AM By Stu Sjouwerman

I just read a fascinating interview with security maven Tim Rohrbaugh, VP for Information Security at Intersections Inc. Intersections is a provider of branded and customized identity ...

The Cyberheist Book Has Arrived!

Apr 22, 2011 8:19:41 AM By Stu Sjouwerman

[caption id="attachment_754" align="alignleft" width="240" caption="Cyberheist"] [/caption] Cyberheist the book has arrived! The Kindle edition is currently selling on Amazon for ...

Conde Nast Caught in $8 Million Spear-Phishing Scam

Apr 21, 2011 7:54:14 AM By Stu Sjouwerman

[caption id="attachment_747" align="alignleft" width="225" caption="cybercrime site"][/caption] I wanted to bring to your attention another major cyberheist scheme that is making news. It ...

Understanding ISAT (Internet Security Awareness Training)

Apr 18, 2011 8:56:34 AM By Stu Sjouwerman

ISAT is pronounced "Eye sat", and stands for Internet Security Awareness Training. It's our bread and butter here at KnowBe4.com, so it's something we like to communicate about regularly, ...

Symantec "Trends for 2010" Report Emphasizes Increased Mobile Cybercrime Threats

Apr 15, 2011 7:42:25 AM By Stu Sjouwerman

Every April, Symantec publishes its Internet Security Threat Report for the preceding year. This month, the company released the latest item in that series entitled " Symantec Internet ...

Smartphone Users at Greatest Risk for Phishing

Apr 13, 2011 9:08:50 AM By Stu Sjouwerman

In the wake of the recent Epsilon e-mail hack, I came across a CNN article " Mobile users more vulnerable to e-mail phishing scams." In that story the reporter, Amy Gahran, asserts the ...

Do Your PCs Come With "For Rent" Signs for Cyberthieves?

Apr 11, 2011 10:48:49 AM By Stu Sjouwerman

Brian Krebs is a former reporter on the information security beat for The Washington Post who now runs his own Website KrebsOnSecurity.com in Northern Virginia. IN a recent (4/8/2011) ...

Check Out These Top 10 Small Business Anti-Cybercrime Tools

Apr 8, 2011 6:29:46 AM By Stu Sjouwerman

Internet.com is a respected information technology publication that's been active on the Web since the late 1990s. Their spin-off Website SmallBusinessComputing.com is a great source for ...

Three Quarters of All SMB Banking Cybercrime Happens Online

Apr 6, 2011 7:07:06 AM By Stu Sjouwerman

A recent study entitled "The 2011 Business Banking Trust Study" reports that three of every four small and midsized businesses that experienced banking fraud in the previous year incurred ...

Millions of Consumer/Customer E-mail Addresses Stolen; Phishing Surely to Follow

Apr 4, 2011 4:05:36 AM By Stu Sjouwerman

Epsilon is one of the world's largest customer outreach e-mail companies, and generates legitimate traffic on behalf of a number of very large companies (see Table 1 below). Epsilon ...

Cybercrime: Bank of America Joins Trusteer Ranks

Apr 1, 2011 7:18:27 AM By Stu Sjouwerman

Look what just showed up in my colleague's e-mail inbox this morning: I wrote in moderate detail about Trusteer in a blog post right here entitled " Cyberheist Snippet 4: More on Trusteer ...

Cybercrime in Your Business

Mar 31, 2011 10:53:44 AM By Stu Sjouwerman

Cybercrime: Ventura County, CA Credit Card Tax Payment System Hacked

Mar 30, 2011 3:38:54 AM By Stu Sjouwerman

Ventura County, California, is a small small county (population: 802,983 according to 2009 numbers from the US Census Bureau) north of the greater Los Angeles area. According to a March ...

Successful certificate cybercrime obtains legit Web certificates

Mar 28, 2011 9:36:34 AM By Stu Sjouwerman

In a recent 3/23/2011 article entitled " Hack Obtains 9 Bogus Certificates for Prominent Websites; Traced to Iran," Wired Threat Level reports on a spectacular cyberheist of credentials ...

Cybercrime: Fascinating 3-Part Series on Russian Cyber-Mafia in NetworkWorld

Mar 25, 2011 5:27:24 AM By Stu Sjouwerman

Talk about turning classwork into pure gold and professional kudos: Norwich University undergraduate student and ROTC cadet Bradley Guinen has teamed up with his instructor and ...

Rustock Botnet Cybercrime Takedown, Thanks to MS-Led Multi-Party Effort

Mar 23, 2011 11:53:13 AM By Stu Sjouwerman

The infamous Rustock botnet, estimated by some parties to be responsible for between 30 and 50 percent of all the spam in the world—up to 30 BILLION items per day—has been taken down. ...

Symantec's Latest 'State of Spam & Phishing' Report

Mar 21, 2011 12:47:30 PM By Stu Sjouwerman

Report #51 from Symantec, the "State of Spam & Phishing" for March 2011 is out. From the phishing side, the news is grim but not unexpected. Phishing is up 38.56% for the month, ...

M86 Security Documents Clever New HTML-based Phishing Scam

Mar 21, 2011 10:45:36 AM By Stu Sjouwerman

In the ongoing game of cops-and-robbers that network security so often involves, the cops have recently upped the ante on phishing detection in modern Web browsers. These days browsers ...

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