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

Catphish and Honey Traps

Hundreds of Israeli soldiers had their phones compromised by malware after falling for catfishing attacks purportedly launched by Hamas, Forbes reports. The Israel Defense Forces (IDF) ...

A U.S. Natural Gas Operator Shuts Down For 2 Days After A Phishing Attack Infects It With Ransomware

Dan Goodin at Ars Technica reported something worrisome: "A US-based natural gas facility shut down operations for two days after sustaining a ransomware infection that prevented ...

Over 500 Browser Extensions Secretly Stealing Millions of Users Private Data Yanked From Chrome Store

Unfortunately, cyber criminals never stop their innovation. Now they have come up with a novel method to both poison Google's extension ecosystem, combined with social engineering tactics ...

New Convincing Verizon Smishing Scam Makes SIM Swaps A Breeze

Cybercriminals intent on using a mobile device as a second factor of authentication are now using texts and very realistic-looking mobile sites to steal details needed to perform SIM ...

The Good Taxi Driver

A taxi driver in Roseville, California saved an elderly passenger from being scammed out of $25,000, CNN reports. Rajbir Singh, the owner of Roseville Cab, recently picked up a ...

[World Premiere] KnowBe4's New Season 2 of Security Awareness Video Series - 'The Inside Man'

We’re excited to announce Season 2 of the award-winning KnowBe4 Original Series - ‘The Inside Man’. This network-quality video training series delivers an entertaining learning experience ...

[Heads-up] The World Health Organization Warns of New Coronavirus Phishing Attacks. Inoculate Your Employees!

The World Health Organization (WHO) is putting out an alert about ongoing Coronavirus-themed phishing attacks that impersonate the WHO and try to steal confidential information and ...

Texas Ranks Second in Number of Ransomware Attacks on Health Care Organizations

According to new data from Comparitech, since 2016 Texas has experienced 14 ransomware attacks impacting a total of 483,000 patients, and costing as much as nearly $20 Million in damages.

New Ransomware Variant Disables MSP Remote Management Processes To Evade Detection

Researchers at HuntressLabs “@Huntress” uploaded a YouTube video and commentary on their Twitter account that demonstrates a new variant of Ragnar Locker /Ragnar Locker Ransomware that ...