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

79% of Employees Have Knowingly Engaged in Risky Online Activities in the Past Year

Aug 4, 2021 1:59:07 PM By Stu Sjouwerman

With employees not believing that it’s important to personally worry about cyber security risks, they also tend to believe they’re not a target, new data suggest as the reason for the ...

You Knew It Would Eventually Happen: Ransomware Lawsuits

Aug 4, 2021 1:58:09 PM By Stu Sjouwerman

Organizations that have fallen victim to a ransomware attack are now being sued by impacted employees and customers alike who are citing loose cybersecurity was in place.

Egress: 73% of Orgs Were Victims of Phishing Attacks in the Last Year

Aug 4, 2021 9:23:12 AM By Stu Sjouwerman

A survey sponsored by Egress found that 94% of organizations suffered insider data breaches over the past year. The survey offers the following results:

CyberheistNews Vol 11 #30 [Eye Opener] Image Inversion as a New Phishing Technique

Aug 3, 2021 9:40:05 AM By Stu Sjouwerman

Ransomware Extortion Attacks Continue to Rise in Frequency as Ransom Payments Decrease by 40%

Aug 3, 2021 9:39:41 AM By Stu Sjouwerman

Ransomware is having a very odd second quarter of the year as new variants enter the game governments finally take notice and insurers tighten their underwriting requirements.

Phishing Attacks Target IT Professionals More Than Any Other Organizational Role

Aug 3, 2021 9:38:45 AM By Stu Sjouwerman

New data from security vendor Ivanti suggests that cybercriminals are focusing in on those in IT roles as targets of phishing attacks, with many admitting to falling victim for these ...

How Social Engineers Use Social Media

Aug 3, 2021 9:38:30 AM By Stu Sjouwerman

People need to be aware of how their social media posts can be used against them, according to Darren Millar, senior vice president of operations at PiiQ Media. In an article for ...

[HEADS UP] Microsoft Warns of Sneaky Phishing Campaign

Aug 3, 2021 8:34:53 AM By Stu Sjouwerman

Microsoft's Security Intelligence team recently sent an alert to Office 365 users and admins to watch out for a suspicious phishing email that uses spoofed sender addresses.

New Phishing Campaign Uses Blackmail to Lure Victims

Aug 2, 2021 8:42:02 AM By Stu Sjouwerman

Bitdefender has observed a phishing campaign that tries to blackmail users into sending money by claiming their computer has been hacked. The emails contain real passwords that have been ...

Visit KnowBe4 at Black Hat USA 2021 - Virtual & In Person Event

Jul 30, 2021 11:05:14 AM By Stu Sjouwerman

Are you attending Black Hat USA 2021 (either in person or virtually) ? Be sure to stop by the KnowBe4 booth August 4th - 5th to find out how to secure your last line of defense: USERS.

Two of the Most Common and Successful Ransomware Attack Methods are Exposed

Jul 30, 2021 9:50:19 AM By Stu Sjouwerman

Researchers at Coveware recently analyzed ransomware attacks during Q2 of this year and noticed a similar trend in ransomware attack methods by cybercriminals.

Ransomware Attacks This Year Are Already Higher Than 2020

Jul 30, 2021 9:50:11 AM By Stu Sjouwerman

According to the 2021 Cyber Threat Report by SonicWall, 304.7 million ransomware attacks occured in the first half of 2021, already surpassing the total number of ransomware attacks for ...

Happy 22nd Annual SysAdmin Day from KnowBe4!

Jul 30, 2021 8:24:46 AM By Stu Sjouwerman

It’s the 22nd annual SysAdmin Day, a day when we celebrate all of the incredible System Administrators! While your job may not be easy (and sometimes not glamorous), your work on the ...

Scammers Use Milanote App to Host Phishing Content and Avoid Detection by Secure Email Gateways

Jul 29, 2021 2:40:16 PM By Stu Sjouwerman

The “Evernote for creatives” collaborative platform is being used to legitimately host malicious links that point victims to phishing links, bypassing detection mechanisms.

The World’s Most Impersonated Brand in Phishing Attacks Is… (and it’s NOT Microsoft!)

Jul 29, 2021 2:39:47 PM By Stu Sjouwerman

Despite so much news surrounding phishing attacks pretending to be from Microsoft’s Office 365 platform, a new report from Vade Secure provides a global perspective to impersonation.

Over 700 Ransomware Victim Organizations are Named on Data Leak Sites in Q2

Jul 29, 2021 2:39:39 PM By Stu Sjouwerman

This massive increase in the number of victim organizations being named demonstrates the harsh reality of how far ransomware threat actors will actually go if ransoms aren’t paid.

Image Inversion as a Phishing Technique

Jul 29, 2021 8:53:54 AM By Stu Sjouwerman

Researchers at WMC Global have found that a phishing kit is using images with inverted colors to avoid detection.

Cybercriminals Are Growing More Organized

Jul 28, 2021 9:03:29 AM By Stu Sjouwerman

The cybercriminal underground is becoming increasingly organized, according to researchers at HP. The criminal underground functions like a regular economy, with people selling goods and ...

Warning: A New Ransomware Cartel Has Formed Sharing Techniques, Code, and Infrastructure

Jul 27, 2021 1:16:20 PM By Stu Sjouwerman

In a new twist, security researchers at Analyst1 have identified four Russian ransomware gangs that actively work together to coordinate attacks, data leaks, and more.

U.K. Employees Pose a Major Cybersecurity Risk to Business as They Return to the Office

Jul 27, 2021 1:16:12 PM By Stu Sjouwerman

After well over a year of getting used to working from home, as U.K. employees look to head back into the office, new data shows they don’t see themselves as a cyber risk (which makes ...

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