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

92% of Organizations Have Experienced a Security Incident as a Result of an Email-Borne Threat

New data shows that not only are email-borne threats increasing, but that current integrated cloud email security solutions do little to detect and stop advanced email-based threats.

New Paypal Phishing Scam Uses “Legitimate” Invoices to Reach Victim Inboxes

Newer phishing scams are looking for ways to make legitimate websites do the work of delivering malicious messages to unsuspecting victims – this new scam achieves it perfectly.

SolidBit Ransomware Targets League of Legends Players

Researchers at Trend Micro warn that a SolidBit ransomware variant is being distributed via fraudulent software targeting video game players and social media users. The malware is being ...

Recent Cisco Hack by Ransomware Group Started Because of a Phishing Attack

In a recent article by Forbes, Cisco confirmed that they were hacked by a ransomware group as the group of cybercriminals published a partial list of files that were claimed to be ...

The Top 8 Most Common Types of DNS Records

This article is a good technical overview of DNS that can help you prevent spoofing. This is a cross-post from the EasyDMARC blog, a new KnowBe4 Ventures portfolio company.

DPRK Operators Impersonate CoinBase

North Korea’s Lazarus Group is running a new phishing campaign targeting Coinbase accounts, BleepingComputer reports. The threat actors are posing as Coinbase and targeting people with ...

New Phishing Campaign is Now Targeting Coinbase Users

If you're a Coinbase user, you are most likely the next target of a new phishing campaign. Cybercriminals have managed to infiltrate two-factor authentication and deploying other social ...

Hacking the Hacker: Assessing and Addressing Your Organization’s Cyber Defense Weaknesses

Cybercriminals are out there, watching and waiting for the perfect opportunity. They are gathering information about your organization and users, devising the perfect plan to infiltrate ...

Cash App Scams Strikes Again With New Types of Attacks

TradeArabia has published a report about common scams on CashApp, explaining that scammers frequently take advantage of CashApp promotions, like the weekly money giveaway, “Super Cash App ...