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

Which Users Will Cause The Most Damage To Your Network And Are An Active Liability?

May 24, 2018 6:08:22 PM By Stu Sjouwerman

The statistic that four percent of employees will click on almost anything, with “Free Coffee” and “Package Delivery” taking some of the top spots among phishbait subject lines, may not ...

Surprise! What's The Country Where All The CEO Fraud Gangs Are?

May 24, 2018 5:05:53 PM By Stu Sjouwerman

A new study by Agari concludes that, despite all the attention nation-state espionage services have been getting for their phishing attacks, the big threat still comes from criminal gangs.

Why are Antivirus Companies Promoting Security Awareness Training?

May 24, 2018 1:33:58 PM By Stu Sjouwerman

Today, the most surprising companies have jumped on the security awareness training bandwagon. Antivirus companies like Sophos, Kaspersky, Webroot and ESET are loudly promoting the fact ...

A Banking Trojan Goes Phishing

May 24, 2018 11:50:22 AM By Stu Sjouwerman

Roaming Mantis has drawn notoriety as a banking Trojan. Its criminal controllers, however, have recently given it some new functionality: phishing and cryptomining. The criminals have ...

Lawyer: GDPR Will Affect Ransomware Reporting In U.S.

May 24, 2018 10:22:18 AM By Stu Sjouwerman

The European Union's General Data Protection Regulation will affect how U.S. companies deal with the rising threat of ransomware attacks, according to a leading privacy lawyer, by ...

“Good Enough” Free AV Software Argues For Security Awareness Training

May 23, 2018 5:18:22 PM By Stu Sjouwerman

By Guest Blogger Win10 Guru Ed Tittel. A surprising number of security experts agree that most users shouldn’t pay for a traditional antimalware suite. Windows 10's built-in protection, ...

Pop-Up Mobile Ads Surge as Sites Scramble to Stop Them

May 23, 2018 5:02:10 PM By Stu Sjouwerman

A recent surge in mobile pop-ups, even on reputable sites, has left people more frustrated than ever.

KnowBe4 Makes It To The Cybersecurity 500 Number Two Spot

May 21, 2018 4:12:26 PM By Stu Sjouwerman

KnowBe4 moves up the Cybersecurity 500 list from number six to number two of the world’s hottest security companies in 2018

CyberheistNews Vol 8 #21 Scam of the Week: GDPR Phishing Attack With Apple Flavor / Royal Wedding

May 21, 2018 9:54:41 AM By Stu Sjouwerman

The KnowBe4 User Conference Was A Blast! Here Are Some Quick Impressions

May 20, 2018 3:28:05 PM By Stu Sjouwerman

The first KB4-CON 2018 in Orlando was super fun. Customers and Partners that attended walked up to me and said they loved it. Often they said it was the best conference they had been to ...

Scam Of The Week: GDPR Phishing Attack With Apple Flavor / Royal Wedding

May 19, 2018 2:01:19 PM By Stu Sjouwerman

Social engineering follows seasonal patterns. It's also connected to major events. We see this every year with holiday-themed phishing attacks between Thanksgiving and New Year's Day.

Phishing and pretexting represent 93% of social attack-based breaches

May 16, 2018 7:12:29 AM By Stu Sjouwerman

A good article in Forbes that takes another dive into the new 2018 Verizon Data Breach Investigations Report.

CyberheistNews Vol 8 #20 [Heads-up] New Attack Blindsides Microsoft Office 365 Anti-Phishing Filter and Blacklists

May 15, 2018 9:46:06 AM By Stu Sjouwerman

KnowBe4 Ranks Top Cybersecurity Training Solutions, 2018 Black Book Market Research User Survey

May 14, 2018 2:47:02 PM By Stu Sjouwerman

KnowBe4 was rated highest in Cybersecurity Training & Education Solutions by survey respondents for the second consecutive year. TAMPA, Fla., May 14, 2018 /PRNewswire/ -- Black Book ...

What Is The Reason Why The Ransomware Threat Is Not Going Away Any Time Soon?

May 14, 2018 6:58:14 AM By Stu Sjouwerman

It's KnowBe4's general policy to not mix business with politics or religion. However, sometimes geopolitics—which focuses on political power in relation to geographic space—is the only ...

[Heads-up] New Attack Blindsides Microsoft Office 365 Anti-Phishing Filter And Blacklists

May 12, 2018 9:40:23 AM By Stu Sjouwerman

Phishers have found a way of moving the malicious URLs in their emails past Office 365's protections. The security company Avanan says they've observed criminals using a tag in the HTML ...

Police Dept Loses 10 Months of Work to Ransomware. Gets Infected a Second Time!

May 12, 2018 8:44:22 AM By Stu Sjouwerman

Bleepingcomputer reported: "Ransomware has infected the servers of the Riverside Fire and Police department for the second time in a month. The first ransomware infection took place on ...

Does Gmail's New 'Confidential Mode' Make Phishing Easier?

May 11, 2018 4:18:28 PM By Stu Sjouwerman

Gmail's new confidential mode lets its users create "expiration dates" for emails, or require recipients to provide an SMS passcode. (And Google also claims they've removed the option to ...

HMRC warns of new wave of UK phishing scams

May 11, 2018 3:35:58 PM By Stu Sjouwerman

Rosie Murray West at the Financial Times reported: "Taxpayers are being targeted by a new wave of phishing scams linked to the financial calendar, HM Revenue & Customs has warned. ...

The history and derivation of the word phishing...

May 11, 2018 3:29:39 PM By Stu Sjouwerman

The word "phishing" can't be found in Chaucer or Shakespeare. It is a homophone of "fishing". But why "ph" instead of "f"? Many English words of Greek origin transliterate "φ" (phi) as ...

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