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

July 2016 Ransomware Roundup: New Strains And New Nasty Features

Jul 5, 2016 11:18:11 AM By Stu Sjouwerman

The ransomware market is rapidly maturing, we start seeing upgraded strains and rebranded versions sold cheaply in the Dark Web. And mainstream media have finally glommed on after years ...

CyberheistNews Vol 6 #27 Intel Thinks "Antivirus Is S#!+" And Dumps Useless McAfee

Jul 5, 2016 9:53:23 AM By Stu Sjouwerman

14 Ways A Cyberheist Hits Your Bottom Line: Total Cost Of A Hack

Jul 3, 2016 9:23:35 AM By Stu Sjouwerman

What is the true cost of a data breach? After analyzing a health plan breach, research firm Deloitte says the toll of a cyberheist is significantly underestimated. The firm in a report ...

Wow, the bad guys are moving fast with CEO Fraud!

Jul 2, 2016 9:41:53 AM By Stu Sjouwerman

KnowBe4 is expanding fast, we now have 120 employees and we just hired a new controller late May to help out our very busy CFO. Part of the KnowBe4 onboarding is getting through our ...

We need your help. Could you do a KnowBe4 review at Gartner?

Jul 1, 2016 4:09:21 PM By Stu Sjouwerman

NOTE: This is for KnowBe4 Customers only. Top IT analyst firm Gartner has just created a new "Peer Insights" review site. As a customer, we are inviting you to create a review of KnowBe4 ...

KnowBe4 has explosive year over year growth of 454% for Q2 2016

Jul 1, 2016 6:21:37 AM By Stu Sjouwerman

(Tampa Bay, FL) July 1, 2016 --- KnowBe4 announced its explosive year over year growth of 454% for Q2 2016, with a record number of 655 new corporate accounts in June alone, rising to ...

Doh! New "Bart" Ransomware from Threat Actors Spreading Dridex and Locky

Jun 29, 2016 10:55:05 AM By Stu Sjouwerman

Proofpoint researchers discovered a new strain of ransomware called "Bart" - no kidding. The Russian Cyber Mafia behind Dridex 220 and Locky are using the RockLoader malware to download ...

IT pros: Half Of Our CEOs Fall Victim To Phishing Scams

Jun 29, 2016 7:55:18 AM By Stu Sjouwerman

Executive boards need better cyber security training, given half of C-level execs fall victim to phishing attacks, according to research conducted by security firm AlienVault. The ...

[ZERO DAY ALERT] Ransomware Targets MS Office 365 Users

Jun 28, 2016 12:23:11 PM By Stu Sjouwerman

Apparently, MS Office 365 built-in security tools are not cutting it. A new strain of the Cerber Ransomware is now targeting MS Office 365 email users with a massive zero-day attack that ...

Intel Thinks Antivirus Is Shit And Dumps Useless McAfee

Jun 28, 2016 7:49:13 AM By Stu Sjouwerman

Remember that in a gray past, Intel had an antivirus product called Intel LanDesk Virus Protect? Well, that Intel LanDesk Virus Protect got acquired by Symantec in 1998, and Intel must ...

CyberheistNews Vol 6 #26 [INFOGRAPHIC] New Survey: Ransomware Infections Double In Two Years

Jun 27, 2016 9:54:03 AM By Stu Sjouwerman

"BadTunnel" Social Engineering Attack Hijacks Your Network Traffic

Jun 26, 2016 9:55:58 AM By Stu Sjouwerman

A researcher in China has discovered a design flaw in Microsoft Windows that affects all versions of the operating system using NetBIOS spoofing —including Windows 10— and lets an ...

Top website domains are vulnerable to email spoofing

Jun 25, 2016 10:11:03 AM By Stu Sjouwerman

Don’t be surprised if you see spam coming from the top websites in the world. Lax security standards are allowing anyone to "spoof" emails from some of the most-visited domains, according ...

Russian Cyber Mafia Is Back From Vacation With Smarter Locky Ransomware Strain

Jun 25, 2016 9:16:00 AM By Stu Sjouwerman

Threatpost reported that the notorious Necurs botnet is back in business, after mysteriously going dark for nearly a month. Researchers report the Necurs has returned to spewing massive ...

IT'S SHOWTIME! Kevin Mitnick Episode on NATIONAL GEOGRAPHIC - THIS SUNDAY

Jun 23, 2016 2:16:00 PM By Stu Sjouwerman

National Geographic has done a special on Kevin Mitnick and it plays this Sunday!

New KnowBe4 Survey: Ransomware Infections Double In Two Years

Jun 22, 2016 10:49:43 AM By Stu Sjouwerman

We have just released the first long-time study focusing on IT Pros experience with ransomware. In June 2016 we surveyed 1,138 companies in a variety of industries and compared your ...

CyberheistNews Vol 6 #25 Scam Of The Week: Lowlife Scum Exploits Recent Orlando Tragedy

Jun 20, 2016 8:35:11 AM By Stu Sjouwerman

Expect Micro Ransomware: Extortion One Document At A Time

Jun 19, 2016 11:09:13 AM By Stu Sjouwerman

I have been following the development of ransomware closely since September 2013 when the ransomware plague was unleashed on the internet in the form of CryptoLocker and its copycats. At ...

New RAA Ransomware Strain Created Entirely Using Javascript

Jun 18, 2016 10:55:36 AM By Stu Sjouwerman

Larry Abrams, who runs Bleepingcomputer was first to report on a new strain of ransomware called RAA. The criminal coders took the somewhat unusual step of writing the whole thing in ...

Scam Of The Week: Orlando Nightclub Phishing Attacks

Jun 17, 2016 5:56:24 PM By Stu Sjouwerman

Just when you think they cannot sink any lower, criminal internet scum is now exploiting the tragedy in Orlando. Unfortunately, from this spot I have been warning about these lowlifes ...

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