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

Misconceptions and Assumptions about Cybersecurity

Misconceptions about cybersecurity can lead to employees falling for preventable attacks, according to Jayant Chakravarti at Toolbox. One misconception is that Apple devices are ...

Multi-Stage Vishing Attacks are Coming to an Inbox Near You

New attacks initially coming in via email are directing victims to make phone calls to attacker-controlled call centers in order to provide banking and credit card details.

Eight Romance Phishing Scammers with Ties to Nigerian Organized Crime Arrested After Stealing Nearly $7 Million

This latest arrest by the South African Police Service (SAPS) demonstrates how romance scams that have been around for decades remain alive and well… and profitable.

Over Half of all Impersonation Attacks Target Non-Executive Employees

A new report shows how cybercriminals focus on users that are less vigilant and more prone to falling for social engineering and impersonation tactics designed to gain access to finances.

KnowBe4's Q3 2021 Top-Clicked Phishing Email Report Includes New Global Data [INFOGRAPHIC]

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. We are now looking at the top categories globally, general subjects (in the United States and Europe, ...

Cybercriminals are using Craigslist email notifications to send phishing links

Cybercriminals are using Craigslist email notifications to send phishing links, according to Roger Kay at INKY. The emails contain links to download a document with malicious macros.

Russian SolarWinds Hackers Newly Attack Supply Chain With Password-Spraying and Phishing

Researchers at Microsoft have observed an attack phishing campaign by Russia’s SVR that’s targeting resellers and managed service providers. Microsoft tracks this threat actor as ...

New Ransomware Variant Brings with it the Dawn of the Era of “Quintuple-Extortion”

A ransomware gang with a new variant is trailblazing us towards the future of ransomware by making threats that go well beyond the simple ransom transactions of yesterday.

Perry Carpenter Interviews with Safety Detectives

Our very own Perry Carpenter, KnowBe4's Chief Evangelist and Strategy Officer, recently interviewed with Aviva Zacks of Safety Detectives.