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

Meta Files Lawsuit Over Phishing Attacks

Meta (Facebook’s corporate parent) and the digital banking company Chime have filed a joint lawsuit against two Nigerian citizens for allegedly impersonating Chime in phishing attacks, ...

FBI: Scammers Exploit Job Posting Sites with Fake Jobs to Steal Money and Personal Information

In the wake of the great reset, cybercriminals are finding success posing as legitimate companies in job postings seeking new hires on well-known job sites.

New Cyberattack Campaign Delivers Multiple RATs via Trusted Cloud Services

Abusing cloud providers including Microsoft Azure and AWS, cybercriminals are setting up malicious infrastructure to hide their operations and avoid detection.

Brand Impersonation and the Healthcare Sector

The healthcare sector is particularly vulnerable to phishing attacks. Employees in the healthcare industry need to be wary of brand impersonation attacks designed to steal credentials or ...

Use of Excel .XLL Add-Ins Soars Nearly 600% to Infect Systems in Phishing Attacks

Cybercriminals are taking to more advanced functionality than traditional VBA scripting to both execute complex malicious actions via Excel and to obfuscate their true intention - ...

Average Ransomware Ransoms Jump 130% While Use of Data Exfiltration Grows

With pressures by law enforcement on ransomware gangs in 2021, and more stringent security requirements by cyber insurers, cybercriminals are changing their tactics to ensure a payoff.

Scammers Now Exploit 'Slinks' in LinkedIn

Scammers are exploiting LinkedIn redirect links, or “Slinks,” to fool users and bypass email security filters, Brian Krebs reports. These links allow companies to track their marketing ...

As Tax Season Starts, So Do IRS Scams - Here’s What to Look For

It’s that time again, when we all dread finding out if we owe money or not. And cybercriminals are banking on it with a wide range of scams that all impersonate the IRS.

KnowBe4 Named a Leader in the Winter 2022 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR)

We are excited to announce that KnowBe4 has been named a leader in the Winter 2022 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR) for the PhishER platform for ...

Phone Number Only Phishing on the Rise

I do not have the data to support my conclusion, but myself and others have noticed the sharp increase in email phishing attempts that include only a phishing message and a phone number ...