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

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 ...

FBI: Business e-mail scam losses top $3 billion, a 1,300% increase in since Jan.

Jun 16, 2016 11:45:10 AM By Stu Sjouwerman

The FBI’s Internet Crime Complaint Center (IC3) this week said the scourge it calls the Business Email Compromise continues to rack-up victims and money – over $3 billion in losses so ...

CyberheistNews Vol 6 #24 Scam Of The Week: Nasty Two-Factor Auth Text Hack

Jun 13, 2016 8:53:29 AM By Stu Sjouwerman

New Type of Spear Phishing Directly Targeted at IT Pros

Jun 12, 2016 8:15:40 AM By Stu Sjouwerman

A member of the SpiceWorks IT forums reported he had received a new type of hybrid attack: first a phone call to his desk, followed up with a phishing email laced with malware, promoting ...

Scam Of The Week: Nasty Two-factor Auth Text Hack

Jun 11, 2016 11:21:12 AM By Stu Sjouwerman

We all know that two-factor authentication (2FA) is much better than just simple user/password credentials. However, there is a nasty spoofing trick that bypasses 2FA if the user does not ...

Individual ransomware payments skyrocket to a whopping $20,000

Jun 8, 2016 9:59:22 AM By Stu Sjouwerman

Heads-up! Individual ransomware payments are getting very expensive. Companies are stockpiling Bitcoin in case they are hit, and a new low-profile strain of ransomware is actually causing ...

Yikes: Ransomware scam targets lawyers with phony ethics complaints

Jun 7, 2016 4:44:32 PM By Stu Sjouwerman

Mike Mosedale at the Minnesota Lawyer wrote: "Talk about your dirty tricks. A new internet scam is targeting lawyers by exploiting one of their great fears: getting slapped with a ...

CyberheistNews Vol #6 #23

Jun 6, 2016 9:39:58 AM By Stu Sjouwerman

Scam Of The Week: FBI Warns Against Email Extortion

Jun 5, 2016 9:48:43 AM By Stu Sjouwerman

Your employees are being attacked both inside and outside the office. This new email extortion scam called CEO fraud can hit in both places, so it makes sense to warn them about this ...

UltraDeCrypter Ransomware DOES NOT Decrypt Your Files

Jun 4, 2016 11:23:08 AM By Stu Sjouwerman

KnowBe4 gets regular calls from system admins who found us on the internet that are between a rock and a hard place. Backups failed and they have no way to revert to normal files. Worse, ...

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