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

Ransomware Recovery Costs Have Doubled for State and Local Governments

Thirty-four percent of state and local government entities were hit by ransomware in 2024, a new report from Sophos has found. While this is a decrease compared to the attack rate in ...

Business Email Compromise Scams Rise 20%, Making up Nearly Half of all Spam Emails

New research on email threats points to AI-based tools to assist in generating BEC content. And the overwhelming targeted role may or may not surprise you.

The Number of Email-Based Cyber Attacks Detected Surge 239% in 1H 2024

New data shows the most prevalent and obvious path into an organization – email – continues to be exploited by a growing number of cybercriminals.

Malvertising Campaign Impersonates Dozens of Google Products

A malvertising campaign is abusing Google ads to impersonate Google’s entire product line, according to researchers at Malwarebytes. The malicious ads are designed to lure victims into a ...

US Political Campaigns Targeted by Iranian Spear Phishing Attacks

Researchers at Recorded Future’s Insikt Group warn that the Iranian state-sponsored threat actor “GreenCharlie” is launching spear phishing attacks against US political campaigns.

Phishing Scammers Leverage Microsoft Dynamics 365 to Target US Government Contractors

Analysis of a phishing campaign targeting thousands of government contractors, dubbed “Operation Uncle Sam,” takes advantage of some sophisticated steps to avoid detection.

Threat Actors Abuse URL Rewriting to Mask Phishing Links

Threat actors are abusing a technique called “URL rewriting” to hide their phishing links from security filters, according to researchers at Perception Point.

U.K. Management Almost Twice as Likely to Fall for Phishing Attacks Versus Entry-Level Employees

Highlights from a new survey focused on employee compliance reveals just how targeted and susceptible U.K. businesses are to phishing attempts.