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

Cybercriminals Sent 1.76 Billion Social Media Phishing Emails in 2023

Mar 1, 2024 12:52:46 PM By Stu Sjouwerman

As social media phishing reaches new heights, new data reviewing 2023 shows a massive effort by cybercriminals to leverage impersonation of social media brands.

Email-Based Cyber Attacks Increase 222% as Phishing Dominates as the Top Vector

Mar 1, 2024 12:52:43 PM By Stu Sjouwerman

Analysis of the second half of 2023 shows attackers are getting more aggressive with email-based phishing attacks in both frequency and execution.

New Research: Ransomware Incidents Spike 84% in 2023

Feb 28, 2024 2:26:02 PM By Stu Sjouwerman

Newly-released data covering cyberthreats experienced in 2023 sheds some light on how very different last year was and paints a picture of what to expect of cyber attacks in 2024.

Phishing Campaign Targets Mexican Taxpayers With Tax-Themed Lures

Feb 28, 2024 2:25:59 PM By Stu Sjouwerman

A phishing campaign is targeting users in Mexico with tax-themed lures, according to researchers at Cisco Talos. The phishing emails direct users to a website that attempts to trick them ...

When Threat Actors Don’t Have a Viable Email Platform to Phish From, They Just Steal Yours

Feb 28, 2024 12:21:15 PM By Stu Sjouwerman

New analysis of a phishing campaign shows how cybercriminals use brand impersonation of the platforms they need to compromise accounts and takeover legitimate services.

[SCARY] You knew about OSINT, but did you know about ADINT?

Feb 27, 2024 10:27:09 AM By Stu Sjouwerman

WIRED just published a scary (long) article. I am summarizing it here and highly recommend you read the whole thing.

Emails Are Responsible for 88% of Malicious File Deliveries

Feb 27, 2024 9:50:59 AM By Stu Sjouwerman

Emails are still the most common delivery method for malicious files, according to Check Point’s Cyber Security Report for 2024.

Annual Ransomware Payments Surpass $1 Billion

Feb 27, 2024 9:50:53 AM By Stu Sjouwerman

For the first time, analysis of ransomware payments made in a single year tops $1,000,000,000. This signals a massive return to more frequent, sophisticated, and successful attacks.

CyberheistNews Vol 14 #09 Exposed: Global Espionage Unleashed by China's Police in Groundbreaking Leak

Feb 27, 2024 9:00:00 AM By Stu Sjouwerman

Swiss Government Identified 10,000 Phishing Websites Impersonating 260 Brands

Feb 26, 2024 8:00:00 AM By Stu Sjouwerman

Attacks targeting Swiss residents increased 10% last year, according to newly-released data that shows a growth in not just phishing attacks, but brand impersonation at purely a national ...

Your KnowBe4 Compliance Plus Fresh Content Updates from February 2024

Feb 26, 2024 8:00:00 AM By Stu Sjouwerman

Check out the February updates in Compliance Plus so you can stay on top of featured compliance training content.

Face off: New Banking Trojan steals biometrics to access victims’ bank accounts

Feb 23, 2024 10:11:50 AM By Stu Sjouwerman

Venturebeat had the scoop on a fresh Group-IB report. They discovered the first banking trojan that steals people’s faces. Unsuspecting users are tricked into giving up personal IDs and ...

Nearly One in Three Cyber Attacks In 2023 Involved The Abuse of Valid Accounts

Feb 23, 2024 9:02:47 AM By Stu Sjouwerman

Thirty percent of all cyber incidents in 2023 involved abuse of valid credentials, according to IBM X-Force’s latest Threat Intelligence Index. This represents a seventy-one percent ...

Data Breach at French Healthcare Payment Processor Puts 20 Million Policyholders at Risk

Feb 23, 2024 9:02:40 AM By Stu Sjouwerman

A single account being phished caused millions of French healthcare policyholder records to be breached.

Your KnowBe4 Fresh Content Updates from February 2024

Feb 23, 2024 8:00:00 AM By Stu Sjouwerman

Check out the 29 new pieces of training content added in February, alongside the always fresh content update highlights, events and new features.

Exposed: Global Espionage Unleashed by China's Police in Groundbreaking Leak

Feb 21, 2024 4:12:11 PM By Stu Sjouwerman

[DEVELOPING STORY] I get my news from a very wide variety of sources. One is the venerable SpyTalk news that lives in Substack. They just reported something pretty astounding. Here are ...

QR-Code Attacks Target the C-Suite 42 Times More than Standard Employees

Feb 21, 2024 3:23:36 PM By Stu Sjouwerman

QR-code attacks leveraging QR-codes are kicking into high gear and becoming a common method used in phishing attacks, according to new data from Abnormal Security.

Malware Delivered Through Phishing Surges 276%

Feb 21, 2024 3:23:19 PM By Stu Sjouwerman

Researchers at VIPRE Security observed a 276% increase in malware delivered by phishing between Q1 and Q4 of 2023.

[INFOGRAPHIC] KnowBe4’s Learner App by the Numbers

Feb 21, 2024 8:00:00 AM By Stu Sjouwerman

The KnowBe4 Learner App enables your users to complete their security awareness and compliance training conveniently from their smartphones and tablets.

IBM Tests Audio-Based Large Language Model to Hijack Live Conversations

Feb 20, 2024 1:03:01 PM By Stu Sjouwerman

With the idea in mind to “audio-jack” a live call-based banking transaction, security researchers were successful in inserting cybercriminal-controlled account details.

Security Awareness Training Blog

View Topics