KnowBe4 Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in human and agent security including social and prompt engineering, ransomware and phishing attacks.

Stu Sjouwerman

Founder and Executive Chairman

Stu Sjouwerman (pronounced “shower-man”) is the Founder and Executive Chairman 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.


Recent Posts

KnowBe4 Named a Leader in the Winter 2024 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR)

We are excited to announce that KnowBe4 has been named a leader in the Winter 2024 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR) for the PhishER platform for ...

Pikabot Malware Spreading Through Phishing Campaigns

Researchers at Trend Micro warn that a threat actor known as “Water Curupira” is distributing the Pikabot malware loader via widespread phishing campaigns.

KnowBe4 Named a Leader in the Winter 2024 G2 Grid Report for Security Awareness Training

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 ...

Cybercriminals Celebrate the Holidays with Dark Web Data Dumps, Dubbed  “Leaksmas”

Millions of data records and GBs of data from organizations around the globe were made freely available to cybercriminals to coincide with dates around Christmas of 2023.

Red Flags for Phishing: Verizon Outlines Latest Scams to Watch Out For

Verizon has published an article outlining various forms of social engineering attacks, including SMS/text messaging phishing (smishing), voice phishing (vishing), and spear phishing ...

Guarding the Cloud: Top 5 Cloud Security Hacks and How You Can Avoid Them

Navigating the cloud security landscape is no walk in the park. It requires IT professionals like you to not only tackle traditional security threats, such as managing data access and ...

FBI Releases Blackcat Ransomware Decryption Tool to Victims, Disrupting Attacks

For the first time ever, the U.S. Justice Department announced the existence of an FBI-developed decryption tool that has been used to save hundreds of victim organizations attacked by ...

2024 Security Software Pricing Preference Survey

I need your help, I'm super interested to know what your current preferences are related to licensing and pricing models for security software. You may love or hate particular models and ...

Black Basta Ransomware Decryptor Released to Help Some Victims

A flaw found by security researchers in the encryption software allows victim organizations to use “Black Basta Buster” to recover some of their data – but there’s a catch.

Phishing Reigns as the Most Likely and Most Feared Cyber Attack

With over half of organizations being the victim of password-based attacks in the last year, new data sheds light on the risk of phishing attacks and the use of password-based credentials.

AI-Powered Invoice Fraud: How This Latest Scam Hijacks Your Business Transactions

Resecurity is tracking a cybercriminal gang called “GXC Team” that develops and sells tools to facilitate online banking theft and social engineering attacks.

Lockbit 3.0 Ransomware Disrupts Emergency Care at Multiple German Hospitals

Hitting three hospitals within a Germany-based hospital network, the extent of the damage in this confirmed ransomware attack remains undetermined but has stopped parts of operations.

New Research: Phishing Attacks Stole $295 Million In Crypto In 2023

Researchers at Scam Sniffers have found that phishing attacks stole nearly $295 million worth of cryptocurrency from 324,000 victims in 2023, CryptoSlate reports. The cryptocurrency is ...

AI Breaks Free: New Insights into the Latest Chatbot Jailbreak Hack

Fascinating article at TechXplore, December 28, 2023. Computer scientists from Nanyang Technological University, Singapore (NTU Singapore) have managed to compromise multiple artificial ...

AI in 2024: The Top 10 Cutting Edge Social Engineering Threats

The year 2024 is shaping up to be a pivotal moment in the evolution of artificial intelligence (AI), particularly in the realm of social engineering. As AI capabilities grow ...

Your KnowBe4 Fresh Content Updates from December 2023

Check out the 36 new pieces of training content added in December, alongside the always fresh content update highlights, events and new features.

Impersonation Attack Data Breaches Predicted to Increase in 2024

With so much of an attack riding on a cybercriminals ability to gain access to systems, applications and data, experts predict the trend of rising impersonation is only going to get worse.

U.K. Government 'Ill-Prepared' to Deal With High Risk of Catastrophic Ransomware Attacks

A new report from the U.K. government’s Joint Committee on the National Security Strategy (JCNSS) outlines both just how likely an attack on critical national infrastructure is and where ...

[Heads Up] SMTP Smuggling - How It Easily Circumvents Your Email Defenses

A newly-discovered technique misusing SMTP commands allows cybercriminals to pass SPF, DKIM and DMARC checks, allowing impersonated emails to reach their intended victim.