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

Malicious Office Documents Jump to 37% of All Malware Downloads at the End of 2021

With the ubiquitous use of Microsoft Office today, it should come as no surprise that malicious macro-laden documents continue to reign, with PPT files delivering AgentTesla taking the ...

[Heads Up!] DHS Sounds Alarm on New Russian Destructive Disk Wiper Attack Potential

CNN just reported on a Jan 23 Intelligence Bulletin from the US Department of Homeland Security (DHS) that warned state and local governments and critical infrastructure operators about ...

Ransomware Operators Try to Recruit Insiders

Sixty-five percent of organizations report that their employees have been contacted by ransomware attackers in an attempt to recruit insider threats, according to researchers at Pulse and ...

Irish Teaching Council Fined €60,000 for Phishing-Induced Breach

Ireland’s Teaching Council has been fined €60,000 by the country’s Data Protection Commission (DPC) over a breach of nearly ten thousand teachers’ data, the Irish Examiner reports. An ...

[New Benchmarking Feature] Compare Your Organization’s Security Culture with Other Organizations in Your Industry

We are excited to announce that the KnowBe4 Industry Benchmarking feature has been expanded to now include industry benchmark comparison data for KnowBe4’s Security Culture Survey (SCS).

A Generational Divide Among Social Engineering Victims

Younger and older people differ in their susceptibility to different types of social engineering attacks, according to researchers at Avast. Younger people tend to fall for scams ...

FBI: US Defense Industry Organizations Targeted with USB-Based Ransomware Attacks

Using mailed out “BadUSB” drives as the initial attack vector, cybercriminals are attempting to infiltrate sensitive networks and infect them with BlackMatter or REvil ransomware strains.

New U.K. Vishing Scam Offers Significant Phone Plan Discounts in Exchange for your Phone Provider's One-Time Security Code

Scammers targeting customers of mobile carrier O2 are enticing victim engagement by offering discounts on their mobile plan as much as 40%.

DHL is Now the Most Spoofed Brand in Phishing

International shipping company DHL was the most impersonated brand in phishing attacks during the fourth quarter of 2022, researchers at Check Point have found.

Ransomware Attacks are Growing in Number, But Not in Sophistication

As organizations work to protect against the relentless series of ransomware attacks that have plagued businesses large and small, the methods of attack seem to be leveling out.

Google Docs Comment Feature is the Key to a New Wave of Phishing Campaigns

Hackers take advantage of legitimate comment functionality as a way to look legitimate, reach the Inbox, and avoid detection, despite using malicious links for phishing attacks.

Half of All Organizations Hit by Ransomware Experience Productivity Loss

According to new data, ransomware is expected to be a larger and more likely threat in the next year, making the impacts felt today very relevant as the impetus for improved cybersecurity.

KnowBe4's Top-Clicked Phishing Email Results for Q4 2021 Compare the U.S. and EMEA [INFOGRAPHIC]

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. We analyze the top categories, general subjects (in both the United States and Europe, Middle East and ...

A Cyberespionage Group Uses Social Engineering

A sophisticated China-aligned threat actor is using social engineering to carry out cyberespionage and financially motivated attacks, according to researchers at Trend Micro.

North Korean Cryptocurrency Theft Relies on Social Engineering

A North Korean threat actor being called “BlueNoroff,” a subunit of Pyongyang’s Lazarus Group, has been targeting cryptocurrency startups with financially motivated attacks, researchers ...

KnowBe4 Named a 2021 Gartner Peer Insights™ Customers’ Choice for Security Awareness Computer-Based Training

KnowBe4 is excited to announce that we have been recognized as an overall Customers’ Choice in the December 2021 Gartner Peer Insights ‘Voice of the Customer’: Security Awareness ...

[On-Demand Webinar] Nuclear Ransomware 3.0: We Thought It Was Bad and Then It Got Even Worse

We thought it was bad enough when traditional ransomware started to steal data in its second generation of evolution, now dubbed "double extortion". The third stage of ransomware is ...

Fifty FIFA eSports Accounts Were Hacked Via Social Engineering

Video game maker Electronic Arts (EA) has stated that around fifty high-profile accounts for the soccer game FIFA 22 were hacked after attackers manipulated the company’s customer service ...

FBI: Beware of a New Google Voice Authentication Scam – Even if You Don’t Use Google Voice!

A new advisory warns of a scam that can affect literally anyone designed as a precursor to additional vishing scams and/or to perform Gmail account takeovers.