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

Camaro Dragon APT Group Continues to Employ USB Devices as Initial Attack Vector

Jul 7, 2023 10:50:41 AM By Stu Sjouwerman

Apparently expanding efforts outside of Southeast Asian countries, this threat group’s known malware has shown up in a European healthcare facility, raising concerns for USB-based attacks.

Email-Based Cyber Attacks in Europe Increase 7-Fold in Just One Year

Jul 7, 2023 10:50:09 AM By Stu Sjouwerman

An abnormally massive focus on business email compromise attacks in Europe has fueled an equally large growth in overall email attacks there, with the U.S. also seeing significant attack ...

Microsoft Teams Cyber Attack Exploit Tool Relies on Social Engineering to Deliver Malware

Jul 7, 2023 8:00:00 AM By Stu Sjouwerman

If your organization uses Microsoft Teams, then you definitely want to hear about a new way bad actors are exploiting this newly discovered cyber attack tool.

New Report Shows Social Engineering and Business Email Compromise Attacks Have Drastically Increased in 2023

Jul 6, 2023 8:45:53 AM By Stu Sjouwerman

Email-based social engineering attacks have risen by 464% this year compared to the first half of 2022, according to a report by Acronis. Business email compromise (BEC) attacks have also ...

Nerve Center: Protect Your Network Against New Ransomware Strains with Our Latest RanSim Update

Jul 6, 2023 8:00:00 AM By Stu Sjouwerman

Ransomware continues to be a major threat for all organizations and, according to the Verizon 2023 Data Breach Investigations Report, is still present in 24% of breaches.

Threat Actors are Using Image-Based Phishing Emails to Lure Victims

Jul 6, 2023 7:30:00 AM By Stu Sjouwerman

Attackers are increasingly using images in phishing to evade text-based security filters, according to researchers at INKY.

Japan's Largest Port is the Latest Victim of a Ransomware Attack

Jul 5, 2023 9:23:22 AM By Stu Sjouwerman

The largest port in Japan, Nagoya, is now the most recent victim of a ransomware attack.

CyberheistNews Vol 13 #27 [Heads Up] Massive Impersonation Phishing Campaign Imitates Over 100 Brands and Thousands of Domains

Jul 5, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #27 | July 5th, 2023 [Heads Up] Massive Impersonation Phishing Campaign Imitates Over 100 Brands and Thousands of Domains A year-long phishing campaign has been ...

KnowBe4 Named a Leader in the Summer 2023 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR)

Jul 5, 2023 8:00:00 AM By Stu Sjouwerman

We are excited to announce that KnowBe4 has been named a leader in the Summer 2023 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR) for the PhishER platform for ...

KnowBe4 Named a Leader in the Summer 2023 G2 Grid Report for Security Awareness Training

Jul 5, 2023 7:30:00 AM By Stu Sjouwerman

We are thrilled to announce that KnowBe4 has been named a leader in the latest G2 Grid Report that compares Security Awareness Training (SAT) vendors based on user reviews, customer ...

The Better Business Bureau Warns of Process-Server Phishbait

Jul 3, 2023 10:51:41 AM By Stu Sjouwerman

The Better Business Bureau (BBB) has warned of a scam in which attackers pose as process servers in order to steal information and commit identity theft.

[FREE Resource Kit] July Is Ransomware Awareness Month

Jun 30, 2023 9:17:26 AM By Stu Sjouwerman

July is Ransomware Awareness Month, and we’ve got you covered with free resources!

Your KnowBe4 Fresh Content Updates from June 2023

Jun 30, 2023 8:00:00 AM By Stu Sjouwerman

Check out the 34 new pieces of training content added in June, alongside the always fresh content update highlights, events and new features.

Use of Crypto Mining Pools to Launder Ransom Funds Grows 100,000% Over 5 Years

Jun 29, 2023 1:18:18 PM By Stu Sjouwerman

New analysis shows sources of cryptocurrency being placed into mining pools with huge deposits that make it easier for cybercriminals to make their ransom funds untraceable.

HTML Files Top the List as the Most Commonly Used Malicious Attachment

Jun 29, 2023 1:18:14 PM By Stu Sjouwerman

As executables and scripts are unable to bypass security solutions as attachments, cybercriminals turn to HTML as a means of obfuscation and malicious execution.

Iranian Threat Actor Charming Kitten Using Spear Phishing Campaign To Distribute Malware

Jun 29, 2023 1:18:11 PM By Stu Sjouwerman

The Iranian threat actor Charming Kitten is launching sophisticated spear phishing attacks to distribute a new version of its POWERSTAR malware, according to researchers at Volexity.

The face of 2023's cyber-threat landscape was an alarming surge in ransomware and phishing attacks

Jun 29, 2023 6:46:30 AM By Stu Sjouwerman

When KnowBe4 went public in April 2021, I got to know a select group of analysts that served as co-managers on our IPO. These professionals all know our industry very well and we spoke ...

Newly Discovered Phishing Attacks Target Bank Customers

Jun 28, 2023 11:16:49 AM By Stu Sjouwerman

First National Bank has warned of an increase in phishing and smishing attacks, IT-Online reports.

National Cyber Security Centre Notes UK Law Firms are Main Target for Cybercriminals

Jun 28, 2023 11:16:46 AM By Stu Sjouwerman

In the most recent Cyber Threat report from the National Cyber Security Centre (NCSC), it is clear that UK law firms are a gold mine for cybercriminals.

Massive Impersonation Phishing Campaign Imitates over 100 Brands and Thousands of Domains

Jun 28, 2023 8:24:49 AM By Stu Sjouwerman

A year-long phishing campaign has been uncovered that impersonates 100+ popular clothing, footwear, and apparel brands using at least 10 fake domains impersonating each brand.

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