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

Mimecast Identifies Brand New Phishing Tactic Called "SHTML"

In early April, researechers discovered a rare type of server-parsed HTML (SHTML) based phishing attack emerging from the UK.

Chinese Hackers Use Island Hopping to Steal Industrial and Commercial Secrets in 5-year Attack on the World’s Largest Technology Service Providers

Dubbed the “Cloud Hopper” campaign, victim companies such as Ericsson, HPE, IBM, and more were targets of exfiltration aimed and helping advance the Chinese economy.

Microsoft Discovers New Excel-Based Attack to Deliver the FlawedArmmyRAT Malware

A new set of tweets from Microsoft Security Intelligence walks through an attack that uses a number of built-in Windows toolsets to infect machines with the notorious malware.

Attacker’s Use of OneDrive as a Malicious File Host Jumps Over 3200% in Q1

The need for reputable hosting services to make phishing scams involving malicious files look legitimate has caused a rise in popularity for Microsoft’s cloud-based file sharing service.

Evite Invites Over 100 Million People to Their Data Breach

Larry at Bleepingcomputer wrote: "The data breach monitoring service Haveibeenpwned.com has added a database dump of almost 101 million Evite users who had their information exposed when ...

UK Mid-Sized Firms Lost £30bn to CyberAttacks in 2018

Phil Muncaster at InfoSec Mag reported that "Cybersecurity incidents have cost UK mid-market firms a combined £30bn over the past year as automated attacks become the norm, according to ...

Is ‘REvil’ the New GandCrab Ransomware?

Brian Krebs wrote: "The cybercriminals behind the GandCrab ransomware-as-a-service (RaaS) offering recently announced they were closing up shop and retiring after having allegedly earned ...

NEW SANS Whitepaper: Automating Response to Phish Reporting

As part of his SANS Technology Institute Master's degree, Geoffrey Parker recently published a whitepaper called Automating Response to Phish Reporting that got an A, was made a gold ...