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

Hacking Compromised Brazilian Bank Top To Bottom

Apr 8, 2017 9:32:52 AM By Stu Sjouwerman

Now here is an IT hacking horror story for you! Kaspersky's blog tells the tale of a bank in Brasil who lost their full online presense and had all of its 36 domains, corporate email and ...

Which phishing emails fooled the most people? [INFOGRAPHIC]

Apr 7, 2017 2:45:22 PM By Stu Sjouwerman

Kevin Mitnick, our Chief Hacking Officer forwarded this great poster to me he found on Twitter today: "Which phishing emails fooled the most people?" Share it with your users!

KnowBe4 Is TampaBay's No.1 Midsize Best Place To Work 2017

Apr 7, 2017 6:33:27 AM By Stu Sjouwerman

I did not get much sleep last night. Too excited. Donna Winchester, Times Correspondent sent me an email yesterday that today at 5am the story would go live. What story?Where KnowBe4 ...

KnowBe4 Gets Top Award At InfoSecWorld Conference

Apr 4, 2017 10:55:17 AM By Stu Sjouwerman

Drum roll!!! We were given some great news last night and informed that we were honored with a top award from Black Book at the InfoSecWorld Conference in Orlando, FL. One of the nice ...

KnowBe4 Reports Record Q1 2017 Performance

Apr 4, 2017 8:00:00 AM By Stu Sjouwerman

Friday March 31, 2017 was the best day of my professional career. A "million-dollar day", highest-ever month and highest-ever quarter. A massive thank you to all our existing and new ...

CyberheistNews Vol 7 #14 Scam of the Week: The Evil Airline Phishing Attack

Apr 3, 2017 9:50:48 AM By Stu Sjouwerman

New Cerber Ransomware Starts Evading Machine Learning

Apr 2, 2017 7:59:56 PM By Stu Sjouwerman

A new version of the Cerber ransomware family has adopted new techniques to make itself harder to detect by endpoint security software that uses machine learning for detection. It is now ...

Gigabyte Firmware Flaws Allow the Installation of Ransomware

Apr 1, 2017 3:12:15 PM By Stu Sjouwerman

Now, here is an interesting one. Gigabyte BRIX are very small computers, similar to Intel NUCs, that can be used to replace those bulky desktop towers. I am using Intel NUCs myself at the ...

Samas Ransomware Deletes Veeam Backups, And Maybe Yours Too...

Apr 1, 2017 10:15:02 AM By Stu Sjouwerman

This month, a user on the Atlanta-based 500 million-dollar backup company Veeam community forums reported that they were hit with Samas ransomware. I am giving you the short version here: ...

Scam Of The Week: The Evil Airline Phishing Attack

Apr 1, 2017 8:29:53 AM By Stu Sjouwerman

Our friends at Barracuda run their Email Threat Scanner over hundreds of thousands of customer mailboxes and discovered a highly effective phishing attack that tricks a whopping 90% of ...

SecureWorks Exposes Phishing Russian Hacker Gang APT28

Mar 31, 2017 7:27:13 AM By Stu Sjouwerman

Atlanta-based SecureWorks has a Counter Threat Unit which has been closely watching the Russian hacker gang APT28 over the last few years and released brand new research. This group of ...

CyberheistNews Vol 7 #13 Who Were the Two Big US Tech Companies That Lost 100 Million Dollars in CEO Fraud?

Mar 27, 2017 9:24:52 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

KnowBe4 Appoints Former Gartner Research Analyst Perry Carpenter as Chief Evangelist and Strategy Officer

Mar 25, 2017 6:00:13 PM By Stu Sjouwerman

Perry Carpenter, former Research Director, Security & Risk Management and esteemed analyst at Gartner, has joined KnowBe4 as Chief Evangelist and Strategy Officer. As the provider of ...

Chinese Hackers Use Fake Cellphone Tower to Spread Android Banking Trojan

Mar 25, 2017 5:29:00 PM By Stu Sjouwerman

Check Point Software blogged about Chinese hackers who have taken smishing to the next level, using a rogue cell phone tower to distribute Android banking malware via spoofed SMS messages.

Does DoubleAgent Turn Antivirus Into Malware? We Are Calling BS On That.

Mar 25, 2017 4:39:44 PM By Stu Sjouwerman

It was all over the press. Initially reported by Bleepingcomputer and picked up by sites like Endgadget, they all went gaga over a new technique that allows the bad guys to take over your ...

Ransomware Is Skyrocketing, But Where Are All The Breach Reports?

Mar 25, 2017 3:58:10 PM By Stu Sjouwerman

More than 4,000 ransomware attacks occur daily and healthcare is the largest target. However, despite disclosure requirements and the risk of late or no HIPAA notification at all, breach ...

Who Were The Two Big US Tech Companies That Lost $100 Million In CEO Fraud?

Mar 23, 2017 6:51:21 AM By Stu Sjouwerman

4/28/2017 UPDATE: Facebook and Google confirmed as victims of $100M phishing scam. Story at The Verge. In an update on an earlier post of April 2016, more detail came known about this ...

CyberheistNews Vol 7 #12 A Single Spear Phishing Click Caused the Yahoo Data Breach

Mar 21, 2017 9:45:32 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

Mandiant M-Trends 2017: "Cybercrime Skills Now On Par With Nation States"

Mar 18, 2017 4:28:00 PM By Stu Sjouwerman

There was some good news reported in Mandiant's M-Trends 2017 report, but this was heavily outweighed by a lot of very bad news. Mandiant, which is a Fireye company, found that in 2016 ...

A Single Spear Phishing Click Caused The Yahoo Data Breach

Mar 18, 2017 10:51:01 AM By Stu Sjouwerman

A single click was all it took to launch one of the biggest data breaches ever. One mistaken click. That's all it took for a Canadian hacker aligned with rogue Russian FSB spies to gain ...

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