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

Telefonica Victim Of $600,000 Bitcoin Ransomware Attack

May 12, 2017 4:51:40 PM By Stu Sjouwerman

Spanish telecoms giant Telefonica was confronted with 85 percent of their systems shut down after ransomware criminals infiltrated its systems demanding $550,000 in Bitcoin. Telefonica is ...

WannaCry Ransomware Attack Uses NSA 0-Day Exploits To Go On Worldwide Rampage

May 12, 2017 2:21:44 PM By Stu Sjouwerman

Raising Cyber Security Awareness Training Doesn’t Have to be Boring

May 12, 2017 11:02:23 AM By Stu Sjouwerman

You may not be aware that the Wall Street Journal recently created a separate WSJ Pro Cybersecurity newsletter in the form of a regular email with relevant news. Of course I subscribed to ...

Macron Campaign Fought Off Phishing Attacks With Cyberdeception Techniques

May 9, 2017 7:24:22 AM By Stu Sjouwerman

Gadi Evron is the Founder and CEO at IT security company Cymmetrica. He wrote a long-ish post on hackernoon (which is powered by Medium). I'm giving you the upshot, but first, what is ...

NEW: Download The "Weak Password Test" Utility

May 8, 2017 10:00:00 AM By Stu Sjouwerman

How weak are your user’s passwords? Are they... P@ssw0rd? Verizon's recent Data Breach Report showed that 81% of hacking-related breaches used either stolen and/or weak passwords. ...

CyberheistNews Vol 7 #19 [ALERT] FBI: "CEO Fraud Is Now a 5.3 Billion Email Scam"

May 8, 2017 9:49:19 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

How Good Is Antivirus Software At Protecting Itself? 32 Products Tested:

May 8, 2017 7:01:53 AM By Stu Sjouwerman

For the third time now, the experts at AV-TEST examined a large number of the security software applications on the market in terms of how well they protect themselves. The focus was on ...

Warren Buffett: "Cyber Security Is The Number One Problem With Mankind".

May 7, 2017 12:15:48 PM By Stu Sjouwerman

Business Insider just wrote: "Warren Buffett sees cyber attacks as a bigger threat to humanity than nuclear weapons. "I'm very pessimistic on weapons of mass destruction generally ...

Top 10 Most Dangerous Phishing Attack Of The Week

May 7, 2017 10:11:51 AM By Stu Sjouwerman

KnowBe4 gets thousands of phishing attacks reported weekly through our free Phish Alert Button, and we pick the 10 most tricky ones, defang them, and put these into a phishing campaign ...

[ALERT] FBI: "CEO Fraud Is Now 5.3 Billion Email Scam"

May 6, 2017 10:55:48 AM By Stu Sjouwerman

There is no better budget ammo for new-school security awareness training than this. Attempts at cyber wire fraud, using spoofed email to impersonate a C-level executive or trusted ...

Ransomware Scum Decide What You Have To Pay By Reading The Economist

May 5, 2017 5:46:16 PM By Stu Sjouwerman

Russian organized cybercrime now has a surprising method of determining how much to ask for – the Big Mac index from The Economist. Security firm Recorded Future blogged that in March, a ...

Cyber Security: “We have met the enemy and it is us.”

May 5, 2017 5:16:00 PM By Stu Sjouwerman

By Laura DiDio, Principal at ITIC, a research and consulting firm based in the Boston area. “We have met the enemy and it is us.” This quote aptly describes the current state of security ...

Massive Google Doc Phishing Attack Propagated Through Social Engineering

May 4, 2017 7:34:13 AM By Stu Sjouwerman

Think Before You Click On Random Google Doc Invitation Links A very convincing Google Docs phishing scheme raced through the internet yesterday, looking like it came from someone you ...

Ransomware Causes 90-day Downtime And 700K Damages For Law Firm

May 3, 2017 7:33:55 AM By Stu Sjouwerman

PROVIDENCE, R.I. — Cybercriminals held a Providence law firm hostage for months by encrypting its files and demanding $25,000 in ransom paid in Bitcoin to restore access, according to a ...

CyberheistNews Vol 7 #18 May 1st Northrop Grumman Can Make a Stealth Bomber – but Falls for W-2 Phishing Attack

May 1, 2017 9:49:47 AM By Stu Sjouwerman

Facebook and Google Were Victims of 100 Million-Dollar Phishing Scam

Apr 29, 2017 10:52:22 AM By Stu Sjouwerman

We have been reporting on this massive Cyberheist for a while now, but Fortune Magazine decided to unleash their investigative reporters and find out exactly who those two mysterious ...

America Ponies Up: Ransomware Payments Rise To $1,077 Per Infection

Apr 29, 2017 9:54:33 AM By Stu Sjouwerman

America was the victim of 34 percent of global ransomware infections in 2016. The "why" is clear; a whopping 64 percent of Americans are willing to pay to get their files back, as opposed ...

100+ Free Ransomware Decryption Tools

Apr 28, 2017 2:16:00 PM By Stu Sjouwerman

The threat of ransomware has never been more real. In fact, 2016 was a record year. Here are some scary statistics from the past year put together by the folks at Barkly: Nearly 50 ...

Northrop Grumman can make a stealth bomber – but falls for W-2 phishing attack

Apr 27, 2017 7:25:59 AM By Stu Sjouwerman

US military contractor Northrop Grumman notified their employees that hackers managed to gain access to their W-2 tax records. As The Register just reported, the makers of America’s ...

Newark City Hall Computers Infected With Ransomware

Apr 25, 2017 11:45:28 AM By Stu Sjouwerman

NEWARK, N.J. (CBSNewYork) — . The City of Newark’s computer system has been disabled by hackers demanding thousands in ransom money, according to a published report. Hackers are demanding ...

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