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

Britain braces for Russian cyber warfare targeting transport links, water supplies, hospitals and airports

Apr 15, 2018 9:31:22 AM By Stu Sjouwerman

The UK Mirror reported that Britain is braced for a wave of crippling cyber attacks in Russian retaliation for the Syrian missile strikes. Here is an excerpt: "Vital transport links, ...

Positive Technologies Social Engineering Report: 17 Percent Fall Foul To “Attacks”

Apr 14, 2018 11:54:50 AM By Stu Sjouwerman

Employees download malicious files, click phishing links, correspond with hackers, and even share contact information for their colleagues. Positive Technologies has released a new report ...

[NEW WHITEPAPER] 10 Best Practices for Protecting Against Phishing, Ransomware and Email Fraud

Apr 14, 2018 11:12:25 AM By Stu Sjouwerman

Organizations have been victimized by a wide range of threats and exploits, most notably phishing attacks that have penetrated corporate defenses, targeted email attacks launched from ...

Ransomware, Phishing, and Pretexting in the Annual Verizon Databreach Report

Apr 14, 2018 10:44:37 AM By Stu Sjouwerman

Did you know, 43% of breaches result from social engineering attacks? What's more, according to a recent Verizon investigation, phishing emails account for 98% of all social engineering ...

State Department warns staff of surge in spear phishing attempts

Apr 13, 2018 10:05:33 AM By Stu Sjouwerman

Eric Geller at Politico reported: "The State Department on Thursday warned employees about a tidal wave of malicious messages attempting to trick staffers into opening a door for hackers. ...

How The World's Most Famous Hacker Tracks Down Lost Luggage...

Apr 12, 2018 8:19:13 PM By Stu Sjouwerman

The adventures of Kevin Mitnick and his girlfriend Kimberly. Kevin called me and told me a story how they were crazy enough to track down a lost (stolen?) bag in Mexico city. His GF ...

[Heads-Up] Phishing Scam Of The Week: Bad Guys Go Nuclear

Apr 12, 2018 7:28:18 AM By Stu Sjouwerman

So, this one is the next new criminal low. This particular phish spoofs a campus-wide security alert for a community college (confidential information blocked out) in Florida. Given that ...

HHS Issues New Guidance On SamSam Ransomware

Apr 11, 2018 2:15:26 PM By Stu Sjouwerman

HHS' Healthcare Cybersecurity and Communications Integration Center released a report March 30 on SamSam, an ongoing ransomware campaign that has targeted the healthcare and government ...

What IT Pros Are Saying About KnowBe4 On Reddit

Apr 10, 2018 3:58:07 PM By Stu Sjouwerman

A Reddit user asked: "I just found this company called KnowBe4 and they claim to be the best at preventing and teaching about social engineering and cyber attacks. They have a free tool ...

Major uptick in mobile phishing URL click rate

Apr 10, 2018 11:53:58 AM By Stu Sjouwerman

In a study of Lookout users, more than half clicked mobile phishing URLs that bypassed existing security controls. Since 2011, Lookout has observed this mobile phishing URL click rate ...

KnowBe4 Fresh Awareness Training Content Update

Apr 10, 2018 9:50:52 AM By Stu Sjouwerman

March was a busy month adding both new and refreshed training content! Because of our acquisition of Popcorn Training in early March we added 38 new videos. Check out the new content ...

CyberheistNews Vol 8 #15 Scam of the Week: Fiendishly Clever Gmail Phishing You Need to Know About

Apr 10, 2018 9:42:05 AM By Stu Sjouwerman

KnowBe4’s Year-Over-Year Sales Rocket 191% for Q1 2018

Apr 10, 2018 7:09:28 AM By Stu Sjouwerman

Today, we are announcing a Q1 2018 year-over-year sales increase of 191%, bringing us to well over 17,000 customers worldwide. I'm super excited to tell you about our hypergrowth for ...

11 ways ransomware is evolving

Apr 8, 2018 4:58:21 PM By Stu Sjouwerman

Michael Nadeau is a senior editor with CSO Online. He has been a publisher and editor of magazines, books, and knowledgebases that help companies get the most from their ERP systems. This ...

Phishing Tops IRS List of Tax-Related Scams for 2018

Apr 7, 2018 6:15:05 PM By Stu Sjouwerman

Michael Trimarchi at the Bloomberg Bureau of National Affairs wrote an excellent article about the continued risk of phishing, as reported by the IRS: "The stealing of personal ...

Best-Funded US Cyber Security Startups By State [InfoGraphic]

Apr 6, 2018 1:43:50 PM By Stu Sjouwerman

We were just made aware of this very interesting map created by CBInsights. It lists the most well-funded cyber security companies in each US State as of Feb 2, 2018. To our pleasant ...

Scam Of The Week: Fiendishly Clever Gmail Phishing Scam You Need To Know About

Apr 6, 2018 11:28:53 AM By Stu Sjouwerman

Twitter user @_thp shared a recent phishing scam that they received; and it’s so fiendishly clever that it’s gone viral. They wrote: "This is the most clever phishing scam I've ever ...

New Security Tool: Mailserver Security Assessment [It's Free]

Apr 5, 2018 9:56:49 AM By Stu Sjouwerman

Do you know what's getting through your mail filters?

CyberheistNews Vol 8 #14 Report: Ransomware Is the New Normal. 52% Have Lost Faith in Antivirus and 44% Agree AV Is Dead

Apr 3, 2018 10:02:24 AM By Stu Sjouwerman

SAM.Gov Hackers Were Handed Spear Phishing, Spoofing & Credential Theft On A Gold Platter

Mar 31, 2018 6:49:45 PM By Stu Sjouwerman

Cybercrooks who stole federal payments by hacking contractor accounts on a GSA website used sophisticated spear phishing techniques to steal login credentials and then diverted payments ...

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