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

Crooks are Sending Halloween-Themed Phishing Emails

Oct 29, 2024 10:34:35 AM By Stu Sjouwerman

Halloween-themed spam and phishing emails have surged over the past two months, with a significant increase beginning in October, according to researchers at Bitdefender.

CyberheistNews Vol 14 #44 [Heads Up] Cyber Attacks Now Shift to Mobile. Are Your Users Prepared?

Oct 29, 2024 9:00:00 AM By Stu Sjouwerman

4 out of 10 Phishing Emails Are Sent From a Compromised Email Account

Oct 28, 2024 4:40:24 PM By Stu Sjouwerman

Analysis of phishing emails in the second quarter of this year paints a picture of what security teams and vigilant recipients should expect from modern phishing attacks.

Threat Actors Compromise Valid Accounts Via Social Engineering

Oct 28, 2024 4:38:14 PM By Stu Sjouwerman

Phishing remains a top initial access vector for cyberattacks, according to researchers at Cisco Talos.

Cyber Attack Tools Now Being Used To Help Phishing Pages Avoid Detection

Oct 28, 2024 9:15:07 AM By Stu Sjouwerman

Cybercriminals are offering tools to help phishing pages avoid detection by security tools, according to researchers at SlashNext.

Cybersecurity Budgets Are Increasing, but Security Leaders Don’t Think It’s Enough

Oct 25, 2024 4:15:23 PM By Stu Sjouwerman

Despite the belief that today’s SOC should be doing the lion’s share of protecting an organization, new data shows reliance on more than just security teams is needed.

[2025 Is Too Late] - European Companies Must Act Now Against AI-Powered Cyber Threats

Oct 24, 2024 1:39:12 PM By Stu Sjouwerman

European Organizations Can't Afford to Wait: Critical Cybersecurity Threats Demand Immediate Action

New Research: 140% Increase in Callback Phishing

Oct 23, 2024 3:29:24 PM By Stu Sjouwerman

Researchers at Trustwave observed a 140% increase in callback phishing attacks between July and September 2024. Callback phishing is a social engineering tactic that involves emails and ...

Ransomware Gang Attack Tactics Have Shifted

Oct 23, 2024 3:29:07 PM By Stu Sjouwerman

A recent analysis of the ransomware group Meow raises the notion that groups are evolving from using encryption as a tactic to more profitable and cost-effective methods.

More Than 33,000 People in the UK Have Been Hacked Over the Past Year

Oct 22, 2024 2:56:57 PM By Stu Sjouwerman

Action Fraud, the UK’s national fraud and cyber crime reporting service, warns that more than 33,000 people have reported that their online accounts have been hacked over the past year.

Nearly Two-Thirds of IT Leaders Have Fallen For Phishing Attacks

Oct 22, 2024 2:56:53 PM By Stu Sjouwerman

Sixty-four percent of IT leaders have clicked on phishing links, a new survey by Arctic Wolf has found. Despite this, 80% of these same professionals are confident their organization ...

CyberheistNews Vol 14 #43 North Korean IT Worker Threat: 10 Critical Updates to Your Hiring Process

Oct 22, 2024 9:00:00 AM By Stu Sjouwerman

Cyber Attackers are Adopting a “Mobile First” Attack Strategy

Oct 21, 2024 2:06:23 PM By Stu Sjouwerman

With 16+ billion mobile devices in use worldwide, new data sheds light on how bad actors are shifting focus and tactics to put attacks into the victim’s hands.

KnowBe4's Cybersecurity Experts Shine at Barnes & Noble in New York City

Oct 21, 2024 11:16:40 AM By Stu Sjouwerman

New York City's iconic Barnes & Noble on 5th Avenue recently featured the newly released books of two of KnowBe4's leading cybersecurity experts: Chief Human Risk Management Officer ...

North Korean IT Worker Threat: 10 Critical Updates to Your Hiring Process

Oct 19, 2024 8:53:26 AM By Stu Sjouwerman

KnowBe4 was asked what changes were made in the hiring process after the North Korean (DPRK) fake IT worker discovery. Here is the summary and we strongly suggest you talk this over with ...

FBI Warns Scammers Are Targeting Law Firms For Phony Debt Collections

Oct 18, 2024 3:59:56 PM By Stu Sjouwerman

The U.S. FBI warns that scammers are attempting to trick law firms into transferring money as part of a phony debt collection scheme.

Phishing Attacks Are Abusing Legitimate Services to Avoid Detection

Oct 18, 2024 2:17:30 PM By Stu Sjouwerman

Microsoft warns that threat actors are abusing legitimate file-hosting services to launch phishing attacks. These attacks are more likely to bypass security filters and appear more ...

UK Company Hacked After Accidentally Hiring North Korean Cybercriminal

Oct 18, 2024 2:17:04 PM By Stu Sjouwerman

In a shocking turn of events, an unnamed company based in the UK has fallen victim to a sophisticated cyber attack after inadvertently hiring a North Korean hacker as a remote IT worker.

AI-Enhanced Cyber Attacks Tops the List of Data Security Threats

Oct 17, 2024 1:37:18 PM By Stu Sjouwerman

AI is quickly becoming the basis for more cyber attacks, leading organizations to realize the risk it presents. A new report now shows that AI-enhanced cyber attacks are now the top ...

Chinese Threat Actor Targets OpenAI With Spear-Phishing Attacks

Oct 16, 2024 3:47:17 PM By Stu Sjouwerman

OpenAI has disclosed that its employees were targeted by spear-phishing attacks launched by a suspected Chinese state-sponsored threat actor.

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