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

Phishing Attack-Turned-Wire Fraud Case Sees a Win for the Policyholder

Mar 23, 2022 2:00:26 PM By Stu Sjouwerman

In an unusual turn of events, a recent court decision sided with the policyholder, despite specific policy language that probably should have favored the insurer.

QakBot Banking Trojan Evolves and Now Takes Over Email Conversations to Spread Malware

Mar 23, 2022 2:00:06 PM By Stu Sjouwerman

As if stealing all your credentials, cookies, and email wasn’t bad enough, this new version of QakBot inserts itself into your emails, impersonating you to gain access to more victims.

Phishing Scam with Fraudulent Invoice Costs City of Fresno Over $600,000

Mar 23, 2022 1:59:56 PM By Stu Sjouwerman

This simple invoice scam appears to be a part of a much broader campaign targeting municipalities, posing as existing subcontractors.

Exploiting Trust in reCAPTCHA

Mar 23, 2022 8:46:14 AM By Stu Sjouwerman

Researchers at Avanan warn that attackers are using reCAPTCHAs on their phishing sites to avoid detection by security scanners.

Published Zelenskyy Deepfake Video Demonstrates the Modern War is Online

Mar 22, 2022 4:10:05 PM By Stu Sjouwerman

The video uploaded to a hacked Ukrainian news website shows how far the technology has come, how it can be used in social engineering, as well as how the tech still needs to improve.

SMBs Are 350% More Likely to Experience Social Engineering Attacks Via Phishing

Mar 22, 2022 4:08:43 PM By Stu Sjouwerman

New data shows phishing, social engineering, and impersonation dominate as cybercriminals are becoming more frequent and successful with their attacks.

CyberheistNews Vol 12 #12 [New White House Alert] Train Your Users Against Threat of Russian Cyberattacks

Mar 22, 2022 11:06:15 AM By Stu Sjouwerman

[New White House Alert] Train Your Users Against Threat of Russian Cyberattacks Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #12 | Mar. 22nd., 2022 [New White House ...

[BREAKING] White House warns Russia is prepping possible cyberattacks against US

Mar 21, 2022 6:16:51 PM By Stu Sjouwerman

With the recent cyber-attacks between Russia and Ukraine and the current intelligence coming from the US Government, organizations want to shore up their defenses to reduce the risk of a ...

Chameleons Phish, Too

Mar 21, 2022 10:40:34 AM By Stu Sjouwerman

One of the challenges cyber criminals face is that their scams often have a relatively short shelf-life. Once they’ve been used, the gaff is quickly blown, and the scammers hope to ...

[Heads Up] New Evil Ransomware Feature: Disk Wiper if You Don't Pay

Mar 17, 2022 8:43:59 AM By Stu Sjouwerman

There is a new ransomware-as-a-service (RaaS) strain called LokiLocker, researchers at Blackberry warn. The malware uses rare code obfuscation and includes a file wiper component that ...

KnowBe4 Named a Leader in The Forrester Wave for Security Awareness and Training Solutions

Mar 17, 2022 8:00:00 AM By Stu Sjouwerman

We’re thrilled to announce that KnowBe4 has been named a Leader in The Forrester WaveTM : Security Awareness and Training Solutions, Q1 2022 report based on our current offering, strategy ...

Ransomware-Related Data Leaks Increase 82% as the Number of Cybercriminal Groups Nearly Triples

Mar 16, 2022 10:27:52 AM By Stu Sjouwerman

New insight into the state of the attacks and threats paints a picture where the cybercriminals are growing in number, sophistication and successes, while victims just sit back seemingly ...

Backups Become the Focus as Three-Fourths of Organizations Experienced Ransomware Attacks

Mar 16, 2022 10:25:21 AM By Stu Sjouwerman

New data puts the spotlight on how most organizations unable to completely recover their data after a ransomware attack, making the case for better data protection for improved incident ...

New Phishing Method Uses VNC to Bypass MFA Measures and Gives Cybercriminals Needed Access

Mar 16, 2022 10:20:57 AM By Stu Sjouwerman

Despite cloud vendors like Google detecting reverse proxies or man-in-the-middle (MiTM) attacks and halting logons to thwart malicious actions, a new method easily gains access.

[Eye Opener] Ukraine Is Now Being Hit With 4 Different Strains Of Wiper Malware

Mar 15, 2022 4:10:10 PM By Stu Sjouwerman

Newly discovered data-destroying malware was found this week in attacks targeting Ukrainian organizations and deleting data across systems on compromised networks. "This new malware ...

We Are In The First Open Source Intelligence War

Mar 15, 2022 11:28:19 AM By Stu Sjouwerman

I am a member of OODA loop. They are a great team that keeps me up to date about InfoSec issues. Their site always has interesting articles and this one certainly got my attention. The ...

CyberheistNews Vol 12 #11 [Heads Up] FBI: Ransomware Gang Breached 52 U.S. Critical Infrastructure Orgs

Mar 15, 2022 9:41:15 AM By Stu Sjouwerman

[Heads Up] FBI: Ransomware Gang Breached 52 US Critical Infrastructure Orgs Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #11 | Mar. 15th., 2022 [Heads Up] FBI: ...

Shipping Fraud Rises Nearly 800% in 2021

Mar 15, 2022 8:48:09 AM By Stu Sjouwerman

Shipping fraud had a global increase of nearly 800% over the course of 2021, according to TransUnion’s 2022 Global Digital Fraud Trends Report.

[On-Demand Webinar] Cybercrime-as-a-Service: Its Evolution and What You Can Do to Fight Back

Mar 15, 2022 8:43:58 AM By Stu Sjouwerman

The cybercrime market has skyrocketed in a frightening way. With threats such as ransomware to Business Email Compromise (BEC), the stakes are higher than ever for organizations across ...

Social Engineering through Contact Form

Mar 14, 2022 9:16:00 AM By Stu Sjouwerman

Email is the familiar form of phishing, but there’s an ongoing criminal campaign that follows a different, arguably subtler avenue of approach: the corporate contact form. Abnormal ...

Security Awareness Training Blog

View Topics