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

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 ...

Equifax: "Oh, minor detail, we also lost 17.6 Million driver's licenses in that data breach"...

May 11, 2018 12:38:18 PM By Stu Sjouwerman

On May 7, executives of Equifax submitted a "statement for the record" to the Securities and Exchange Commission detailing the extent of the consumer data breach the company first ...

KnowBe4 Releases Delegated Admin Permissions

May 10, 2018 5:32:23 PM By Stu Sjouwerman

KnowBe4 is proud to announce support for delegated permissions as part of the Security Roles feature. Security Roles allows you to limit roles to only display specific data or allow for ...

[Breaking] New BitKangoroo Ransomware Deletes Your Files If You Do not Pay

May 9, 2018 1:41:04 PM By Stu Sjouwerman

Our friend Larry Abrams at Bleepingcomputer said: "I am trying something new where I will post in brief articles about new ransomware as they are released. Many of these ransomware ...

CyberheistNews Vol 8 #19 [Heads-up] Scary New Exploit Hacks LinkedIn 2-Factor Auth. See This Kevin Mitnick VIDEO

May 8, 2018 9:36:19 AM By Stu Sjouwerman

[Heads-up] New Exploit Hacks LinkedIn 2-factor Auth. See This Kevin Mitnick VIDEO

May 8, 2018 6:07:35 AM By Stu Sjouwerman

OK, here is something really scary. KnowBe4's Chief Hacking Officer Kevin Mitnick now and then calls me with some chilling news. This time, Kuba Gretzky, a white hat hacker friend of ...

Scam Of The Week: Phishing Attack Uses GDPR As Bait

May 5, 2018 10:40:16 AM By Stu Sjouwerman

Attackers know that companies are sending a lot of emails to customers about GDPR—and that makes them prime opportunity for phishing attacks. With the looming GDPR May 25 deadline almost ...

Q1 2018 Top Clicked Phishing Email Subjects [INFOGRAPHIC]

May 4, 2018 5:05:27 PM By Stu Sjouwerman

This is the second year we've published quarterly results of the most-clicked phishing email subjects across a few categories. We separate the data into subjects related to social media ...

Security Awareness Training Blog

View Topics