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

The Digital Workplace is a Cybersecurity Disaster!

New data reviewing how the 2020 shift to a remote workforce impacted organizational security shows all too well that since the pandemic onset, cybersecurity has become critically worse.

APT Group Use Voice-Changing Software to Impersonate Women as Part of Espionage Attacks

The middle eastern threat group known as APT-C-23 are targeting male soldiers in the Israel Defense Forces in an attempt to get their victims to download and install malware.

New Phishing Attacks Bypass Secure Email Gateways Using Some Very Creative Methods

Microsoft Security Intelligence warns of phishing attacks being sent from legitimate email addresses and IP ranges, taking advantage of gateway configuration settings to ensure delivery.

LinkedIn Data of 500 Million Users Hacked, Up For Sale: Report

Microsoft-owned social network LinkedIn is reportedly the latest victim of a massive data breach where data of 500 million user profiles has been allegedly leaked by cybercriminals. The ...

Phishing Attacks Using PDF Files Have Skyrocketed

Phishing attacks using PDF files have spiked over the past year, according to researchers at Palo Alto Networks’ Unit 42.

The Clop #Ransomware gang is now pressuring  customers of victims threatening that their personal, confidential data will be exposed unless a ransom is paid

Brian Krebs just reported: "Some of the top ransomware gangs are deploying a new pressure tactic to push more victim organizations into paying an extortion demand: Emailing the victim’s ...

The Growing WeTransfer Phishing Campaign Can Put Your Users at Risk

Researchers at Avanan have observed a phishing campaign that’s impersonating the WeTransfer file-sharing app in an attempt to steal users’ credentials. The email’s subject line states, ...

[HEADS UP] New Phishing Attack With .TXT Attachment Can Steal All Your Secrets

The 360 security blog just came up with an eye opener. Recently, 360 Security Center’s threat monitoring platform has detected a new email phishing attack. This attack uses a ...

[Security Culture Report 2021] A Global Security Culture Perspective During a Pandemic

The 2021 KnowBe4 Security Culture Report is the largest study of its kind, measuring organizations' security cultures and surveying more than 320,000 employees across 1,872 organizations ...