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

And Another Billion More Yahoo Accounts Hacked

Dec 14, 2016 9:40:21 PM By Stu Sjouwerman

In the September/ October timeframe this year it became clear that Yahoo had lost more than 500 million records which was the biggest hack of the year. Who knew that they would top ...

CyberheistNews Vol 6 #50 [ALERT] New And Scary Double-Ransomware Whammy

Dec 12, 2016 10:01:16 AM By Stu Sjouwerman

[ALERT] Yikes, A New And Scary Double-Ransomware Whammy.

Dec 11, 2016 12:05:07 PM By Stu Sjouwerman

Sophos reported on one of the more scary ransomware strains I have seen lately. It's called Goldeneye and encrypts the workstation twice: both the files and the Master File Table (MFT). ...

New Book Coming Soon from Kevin Mitnick for You

Dec 11, 2016 10:07:53 AM By Stu Sjouwerman

The Art of Invisibility: The World's Most Famous Hacker Teaches You How to Be Safe in the Age of Big Brother and Big Data Kevin Mitnick, the world's most famous hacker, and KnowBe4's ...

SanFran Muni Ransomware Hacker Gets Hacked Back!

Dec 11, 2016 9:47:49 AM By Stu Sjouwerman

A couple of weeks ago, a yet unknown attacker hacked the computer systems of the San Francisco’s Municipal railway causing a free ride for all that Saturday. The ransomware hacker was ...

Former NSA Director Michael Hayden: "We have a Russia Problem"

Dec 10, 2016 11:19:53 AM By Stu Sjouwerman

I have been saying this here for the last few years, but if you get it confirmed by a former NSA director, that's nice to hear. The Wall Street Journal just reported that President Barack ...

Want Your Ransomed Files Back? Just Infect Someone Else!

Dec 8, 2016 5:03:09 PM By Stu Sjouwerman

Larry Abrams just reported: "Yesterday a new in-development ransomware was discovered by MalwareHunterTeam called Popcorn Time that intends to give victim's a very unusual, and criminal, ...

Locky Ransomware Campaign Using Osiris Extension from Egyptian Mythology

Dec 8, 2016 8:08:04 AM By Stu Sjouwerman

The threat actors behind Locky ransomware have moved on from Norse gods such as Zepto, Odin and Thor and into Egyptian mythology with a new campaign that uses the extension .osiris when ...

Phishing from the Middle: Social Engineering Refined

Dec 8, 2016 7:55:05 AM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher. Phishing attacks have long been associated with malicious emails that spoof well-known institutions in order to trick users into coughing ...

Phishing Reply Tracking Is Now Available for All KnowBe4 Customers

Dec 6, 2016 10:48:48 AM By Stu Sjouwerman

Two of the big cybersecurity attacks are the CEO Fraud (aka Business Email Compromise) which has caused $3.4 billion in damages as well as the W-2 Scams which social engineer ...

CyberheistNews Vol 6 #49 Welcome To The CyberheistNews 2017 Crystal Ball Issue.

Dec 6, 2016 9:48:03 AM By Stu Sjouwerman

CyberheistNews Vol 6 #49 Welcome To The CyberheistNews 2017 Crystal Ball Issue. In December I spend a few days analyzing our space, and predict the coming year. The Crystal Ball issue is ...

Kaspersky: DDoS Often Smokescreen For Phishing Attack

Dec 4, 2016 9:13:03 AM By Stu Sjouwerman

Distributed denial of service attacks, also known as DDoS, are becoming a major threat. They can bring websites and networks down, and generally make a lot of noise demanding attention. ...

Phishing Attack Hits Saudi Govt Networks With Disk-Wiping Malware

Dec 3, 2016 11:10:07 AM By Stu Sjouwerman

Hackers penetrated six Saudi Arabian government agencies including its General Authority of Civil Aviation, and bricked thousands of computers with the well-known Shamoon disk-wiper ...

Russian Central Bank Loses 2 Billion Rubles in Cyberheist

Dec 2, 2016 6:38:21 PM By Stu Sjouwerman

Reuters reported that hackers stole more than 2 billion rubles ($31 million) from correspondent accounts at the Russian central bank, the bank said on Friday. “We can’t say exactly when, ...

CyberheistNews Vol 6 #48 Scam Of The Week - Fake News: A Content-Based Social Engineering Attack

Nov 28, 2016 9:46:23 AM By Stu Sjouwerman

The Top Five Names In Cybersecurity

Nov 26, 2016 3:19:03 PM By Stu Sjouwerman

Looking for the top names in cybersecurity? Look no further than the Cybersecurity 500 list of the world’s hottest and most innovative cybersecurity companies: ...

Scam Of The Week - Fake News: a Content-based Social Engineering Attack

Nov 25, 2016 1:51:24 PM By Stu Sjouwerman

Facebook, Google, and Twitter have recently been facing scrutiny for promoting fake news stories. Depending on your sources and who you believe, fake news played and is still playing a ...

10 Ways To Avoid Holiday Scams

Nov 23, 2016 3:55:35 PM By Stu Sjouwerman

With the biggest cybercriminal hacking holidays of the year upon us, it's time for a reminder of red flags to pay attention to when shopping either online or in brick-and-mortar stores.

Why Advanced Ransomware Is Cybercrime's Most Profitable Business Model

Nov 23, 2016 8:46:01 AM By Stu Sjouwerman

RSA did a revealing ransomware risk-reward analysis. See that $6 million number over to the right? Why does cybercrime like ransomware so much? Low Risk, High Payoff From the bad guy's ...

Yes, that message is really from Facebook. And, yes, it's really malicious.

Nov 23, 2016 8:33:01 AM By Stu Sjouwerman

By Eric Howes, KnowBe4 Principal Lab Researcher Just two weeks after we reported that the bad guys had effectively converted LinkedIin into a phishing platform, Facebook once again found ...

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