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

Chinese Hackers Target Hospitals by Spoofing Medical Software

A Chinese government-backed hacking group is using fake medical software to compromise hospital patients' computers, infecting them with backdoors, keyloggers, and cryptominers.

Phishing Attack Leads to Lateral Movement in Just 48 Minutes

Researchers at ReliaQuest have published a report on a phishing breach in the manufacturing sector that went from initial access to lateral movement in just 48 minutes.

Warning: Russian Threat Actors Are Targeting Signal Accounts With Malicious QR Codes

Several Russian state-sponsored threat actors are using QR code phishing (quishing) to compromise Signal accounts, according to researchers at Google’s Threat Intelligence Group.

Phishing Kit Abuses Open Graph to Target Social Media Users

Researchers at Cyble warn that a phishing kit is abusing the Open Graph (OG) protocol to target social media users.

Phishing Attacks Increased by Nearly 200% in H2 2024

Phishing and malicious emails remained the primary vectors of infection during the second half of 2024, according to a new report from Acronis.

Spear Phishing is the Top Cyber Threat to the Manufacturing Sector

Spear phishing was the top cybersecurity threat to the manufacturing sector over the past six months, according to a report from ReliaQuest. These attacks accounted for 41% of ...

Protect Your Data: Russian Spear-Phishing Targets Microsoft 365 Accounts

Several Russian threat actors, including the SVR’s Cozy Bear, are launching highly targeted spear phishing attacks against Microsoft 365 accounts, according to researchers at Volexity.

New Research: Ransomware Data Extortion Skyrocketing

Data theft extortion attacks increased by 46% in the fourth quarter of 2024, according to a new report from Nuspire.