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

Hackers Use Free Email Accounts from QuickBooks to Launch Spoofed Phishing Attacks

Jul 28, 2022 9:04:00 AM By Stu Sjouwerman

A new attack uses one brand email domain to increase the chances of reaching an Inbox, while spoofing another brand to trick users into transitioning to a vishing attack.

Spear Phishing Campaign Targets Facebook Business Accounts

Jul 28, 2022 9:03:57 AM By Stu Sjouwerman

Researchers at WithSecure have discovered a spear phishing campaign targeting employees who have access to Facebook Business accounts. The attackers are targeting specific employees, and ...

IBM: Phishing is the Most Common Way to Gain Access to Victim Networks

Jul 28, 2022 8:55:52 AM By Stu Sjouwerman

New research from IBM shows four reasons why phishing attacks are still effective and remains the primary attack vector in 41% of cyberattacks.

KnowBe4 Top-Clicked Phishing Email Subjects for Q2 2022 [INFOGRAPHIC]

Jul 27, 2022 12:16:19 PM By Stu Sjouwerman

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. We analyze 'in the wild' attacks reported via our Phish Alert Button, top subjects globally clicked on in ...

Nearly Half of Organizations Have Experienced Vishing

Jul 27, 2022 8:50:32 AM By Stu Sjouwerman

Forty-seven percent of organizations have experienced voice phishing (vishing) attacks over the past year, according to researchers at Mutare. Additionally, the researchers found that ...

New Report Reveals that Ransomware and Business Email Compromise Attacks Cause Nearly 70% of Cyber Incidents

Jul 27, 2022 8:49:48 AM By Stu Sjouwerman

Do you know your organizations true security risk and where to prioritize your resources? A new report from Palo Alto Networks sheds some light on these questions and shows multiple ...

[BEWARE] Microsoft and Facebook are the Most Abused Brands for Phishing Attempts

Jul 26, 2022 11:39:59 AM By Stu Sjouwerman

We all know that big brands can be exploited by bad actors in order to execute successful phishing attacks. Now a new study is showing phishing attacks leveraging big brands Microsoft and ...

Malvertising With Google Ads

Jul 26, 2022 11:39:56 AM By Stu Sjouwerman

Researchers at Malwarebytes warn that a large malvertising campaign is exploiting Google ads to redirect users to phishing sites.

CyberheistNews Vol 12 #30 [Heads Up] New MFA 'Prompt Bombing' Attacks Give Access to Laptops, VPNs, and More

Jul 26, 2022 9:07:34 AM By Stu Sjouwerman

Microsoft USB Scam Shows the Importance of Security Awareness Training

Jul 25, 2022 10:47:48 AM By Stu Sjouwerman

Just when you thought scammers couldn't get more tricky in their attacks, this example will prove you wrong. One of our KnowBe4 colleagues shared this LinkedIn post on a recent very ...

Ransomware Groups Get Smaller and More Social

Jul 25, 2022 9:12:21 AM By Stu Sjouwerman

The Colonial Pipeline ransomware attack of 2021 put infrastructure operators on notice that they were directly in the crosshairs of big ransomware gangs. The reaction of law enforcement ...

[Heads Up] Huge Losses Caused By Epidemic of ‘Pig Butchering’ Scams

Jul 21, 2022 1:43:18 PM By Stu Sjouwerman

Investigative reporter Brian Krebs reported today that U.S. state and federal investigators are being inundated with reports from people who’ve lost hundreds of thousands or millions of ...

FBI Warns of Phony Cryptocurrency Investment Apps

Jul 20, 2022 10:32:58 AM By Stu Sjouwerman

Cryptocurrency investors have lost nearly $43 million to fraudulent cryptocurrency investment apps, according to the US Federal Bureau of Investigation (FBI).

Cybersecurity Should be an Issue for Every Board of Directors

Jul 19, 2022 4:48:17 PM By Stu Sjouwerman

With so many Boards focused on operations, revenue, strategy, and execution, they completely are forgetting the simple fact that a single cyberattack can bring all that to a screeching ...

CyberheistNews Vol 12 #29 [Heads Up] New Phishing Attacks Shame, Scare Victims into Surrendering Twitter, Discord Credentials

Jul 19, 2022 9:15:17 AM By Stu Sjouwerman

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Stu Sjouwerman

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Recent Posts

Hackers Use Free Email Accounts from QuickBooks to Launch Spoofed Phishing Attacks

Spear Phishing Campaign Targets Facebook Business Accounts

IBM: Phishing is the Most Common Way to Gain Access to Victim Networks

KnowBe4 Top-Clicked Phishing Email Subjects for Q2 2022 [INFOGRAPHIC]

Nearly Half of Organizations Have Experienced Vishing

New Report Reveals that Ransomware and Business Email Compromise Attacks Cause Nearly 70% of Cyber Incidents

[BEWARE] Microsoft and Facebook are the Most Abused Brands for Phishing Attempts

Malvertising With Google Ads

CyberheistNews Vol 12 #30 [Heads Up] New MFA 'Prompt Bombing' Attacks Give Access to Laptops, VPNs, and More

Microsoft USB Scam Shows the Importance of Security Awareness Training

Ransomware Groups Get Smaller and More Social

[Heads Up] Huge Losses Caused By Epidemic of ‘Pig Butchering’ Scams

FBI Warns of Phony Cryptocurrency Investment Apps

Cybersecurity Should be an Issue for Every Board of Directors

CyberheistNews Vol 12 #29 [Heads Up] New Phishing Attacks Shame, Scare Victims into Surrendering Twitter, Discord Credentials

New Multi-Factor Authentication Prompt “Bombing” Attacks Give Access to Laptops, VPNs, and More

Copyright Claim Email is a LockBit Ransomware Phishing Attack in Disguise

Phishing Kit Imitates PayPal

New Phishing Attacks Shame, Scare Victims into Surrendering Twitter, Discord Credentials

Ransomware Group Conti Reaches 40 Successful Attacks in a Single Month

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