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

Reality Hijacked: Deepfakes, GenAI, and the Emergent Threat of Synthetic Media

May 13, 2024 8:00:00 AM By Stu Sjouwerman

"Reality Hijacked" isn't just a title—it's a wake-up call. The advent and acceleration of GenAI is redefining our relationship with 'reality' and challenging our grip on the truth.

[Beware] Ransomware Targets Execs' Kids to Coerce Payouts

May 13, 2024 7:00:00 AM By Stu Sjouwerman

Just when you think bad actors cannot sink any lower, they find a way to. In a recent chilling evolution of ransomware tactics, attackers are now also targeting the families of corporate ...

Ransomware Detection Time Shortens by 44% as Organizations Attempt to Keep Up with Attackers

May 10, 2024 1:49:17 PM By Stu Sjouwerman

New data shows organizations are improving their ability to detect and respond to ransomware attacks, but is it fast enough to make a difference and stop attacks?

Phishing-as-a-Service Platform LabHost Disrupted by Law Enforcement Crackdown

May 10, 2024 8:43:26 AM By Stu Sjouwerman

One of the largest phishing-as-a-service platforms, LabHost, was severely disrupted by law enforcement in 19 countries during a year-long operation that resulted in 37 arrests.

Digital Doppelgängers: AI-Generated Celeb Fashion Takes Over the Met Gala on Social Media

May 10, 2024 8:43:22 AM By Stu Sjouwerman

The Met Gala, fashion's biggest night, was not just the A-list attendees who stole the spotlight—digital imposters in the form of AI-generated superstars sent social media into a frenzy.

Arizona Election Workers Battle Against Deepfake Threats in New AI Defense Drill

May 10, 2024 8:43:19 AM By Stu Sjouwerman

In the quest to secure the integrity of elections, Arizona election workers have taken a groundbreaking step by participating in a first-of-its-kind drill meant to defend against a new ...

[Must Read] How Boeing Battled a Whopping $200M Ransomware Demand

May 10, 2024 6:49:49 AM By Stu Sjouwerman

Boeing recently confirmed that in October 2023, it fell victim to an attack by the LockBit ransomware gang, which disrupted some of its parts and distribution operations. The attackers ...

[Breaking] The News Is Increasingly Broken. Surge Of Inaccurate AI News Stories

May 9, 2024 2:30:57 PM By Stu Sjouwerman

Keeping up to date what is happening is crucial in IT, but the reliability of the news you consume is facing a growing threat.

Phishing Reports in Switzerland More Than Doubled Last Year

May 8, 2024 2:14:41 PM By Stu Sjouwerman

Switzerland’s National Cyber Security Centre (NCSC) received more than 30,000 reports of cyber incidents in the second half of 2023, more than double the amount received in the second ...

9 in 10 Organizations Paid At least One Ransom Last Year

May 8, 2024 2:14:37 PM By Stu Sjouwerman

New analysis of cyber attacks shows ransomware attacks are running far more rampant than previously thought, with half of organizations blaming poor cyber hygiene.

KnowBe4 Earns Multiple 2024 Best Of Awards From TrustRadius

May 8, 2024 2:14:33 PM By Stu Sjouwerman

KnowBe4 is proud to be recognized by TrustRadius for our Security Awareness Training and PhishER platforms.

Verizon: Nearly 80% of Data Breaches Involve Phishing and the Misuse of Credentials

May 7, 2024 2:33:11 PM By Stu Sjouwerman

Innovative analysis of data breaches shows which attack vectors are being used and how they’re enabled, highlighting the roles phishing and credentials play.

Credential-Harvesting Campaign Impersonates Fashion Retailer Shein

May 7, 2024 2:33:08 PM By Stu Sjouwerman

A phishing campaign is impersonating fashion retailer Shein in an attempt to steal users’ credentials, according to researchers at Check Point.

CyberheistNews Vol 14 #19 [EPIC FAIL] Phishing Failures: How Not to Phish Your Users

May 7, 2024 9:00:00 AM By Stu Sjouwerman

The Education Sector Experienced the Highest Number of Data Breaches in 2023

May 7, 2024 8:00:00 AM By Stu Sjouwerman

New data from Verizon makes it clear that the Education sector is under attack, but also breaks down which threat actions and patterns are used most.

U.S. Government Warns of North Korean Spear-Phishing Campaigns

May 7, 2024 8:00:00 AM By Stu Sjouwerman

The North Korean state-sponsored threat actor Kimsuky is launching spear phishing attacks against individuals working at think tanks and academic institutions in the US, according to a ...

Verizon: The Percentage of Users Clicking Phishing Emails is Still Rising

May 3, 2024 2:01:32 PM By Stu Sjouwerman

The long-awaited annual Verizon Data Breach Investigations Report is out, and it’s made very clear that users continue to be a problem in phishing attacks.

Analysis Shows 2023 to be “Worst Year for Phishing on Record”

May 2, 2024 3:45:57 PM By Stu Sjouwerman

Newly-released data highlights our worst fears about the prevalence of phishing, and some glimmer of hope that the good guys may be winning the fight.

Navigating the Masquerade: Recognizing and Combating Impersonation Attacks

May 1, 2024 1:57:31 PM By Stu Sjouwerman

With all great power, there comes an equal potential for misuse. Among the sophisticated arsenal of threat actors, impersonation attacks have surged to the forefront, which questions our ...

[CASE STUDY] Healthcare Organization Hardens Employee Defenses Against Insidious Callback Phishing Attacks

May 1, 2024 1:57:28 PM By Stu Sjouwerman

A major U.S. healthcare provider significantly reduced their employees' susceptibility to callback phishing attacks after using KnowBe4's callback phishing simulation and training ...

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