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

Espionage-Intent Threat Groups Are Now Using Ransomware as a Diversion Tactic in Cyberattacks

A new report focused on cyber espionage actors targeting government and critical infrastructure sectors highlights the strategic use of ransomware for distraction or misattribution.

IRS Warns of Phishing Attacks Targeting Car Dealerships

The US Internal Revenue Service (IRS) has issued an advisory warning of phishing campaigns targeting car dealerships. The IRS says car dealers should be on the lookout for targeted ...

From Reactive to Proactive: Cyber Insurance is Driving Optimal Security Investments for Organizations

New data shows that only 3 percent of organizations are solely relying on their current cyber defenses when adding on cyber insurance, indicating that organizations are beginning to ...

Phishing Continues to Be the Primary Entry to Ransomware Attacks

Phishing remains a top initial access vector for ransomware actors, according to researchers at Cisco Talos. The threat actors often use phishing to steal legitimate credentials so they ...

[On-Demand Webinar] Crack the Code on Ransomware: Empowering Your Last Line of Defense

Cybercriminals are maximizing the potential damage to your organization to boost their profits. A staggering 91% of reported ransomware attacks included a data exfiltration effort. Now is ...

[Warn Your Users] High Scam Risk After Failed Trump Assassination

Pictures of Donald Trump rushed from a campaign stage, his cheek brushed with blood from an assassination attempt, are an unsettling shock.

Phishing Attacks Against State and Local Governments Are Surging

Researchers at Abnormal Security have observed a 360% increase in phishing attacks against state and local government entities over the past year.

Russian Spear Phishing Campaigns Target NATO Entities

Researchers at Mandiant (part of Google Cloud) warn that Russian government threat actors continue to target NATO member countries with spear phishing attacks. APT29 in particular has ...

Dodgy New Phishing Platform Targets Microsoft 365 Accounts at Financial Firms

Analysis of the latest phishing-as-a-service (PhaaS) platform ONNX Store highlights just how successful these platforms can be.