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

Massive Cyberheist Bankrupts Medical Debt Collector

AMCA, a medical billing collections agency that was hacked last year in an incident believed to impact millions of medical patients is now seeking a federal bankruptcy court’s protection ...

Hit by Ransomware Attack, Florida City Agrees to Pay Hackers $600,000

It was all over the press, and even made it in the New York Times: "The leaders of Riviera Beach, Fla., looking weary, met quietly this week for an extraordinary vote to pay nearly ...

[NEW FEATURES] Branded Certificates and End User Surveys

We are excited to announce the release of two new features in the KnowBe4 platform. Branded Certificates and End User Training Surveys!

Subdomain Scam Hits Australian Government Seeking Money to “Register” Bogus Domain Names

Employees of agencies within the Australian government have been receiving targeted emails offering to register what amounts to a subdomain of a legitimate look-alike domain.

U.S. May Face Cyberwar with Russia After Purported U.S. Attacks on Russian Power Grid

The hacking of Russia’s power grid by the U.S. has led to a formal warning from the Kremlin that could escalate into an all-out cyberwar with attacks on U.S. businesses, agencies, and ...

“File Deletion” Alert Becomes the Latest Scam to Compromise Office 365 Credentials

Attackers use simple cause for concern as the basis of a scam intent on tricking victims into offering up their Office 365 credentials.

Two-Thirds of Organizations See an Increase in Impersonation Attacks

Nothing fools a user like an email seemingly from someone they know. And, according to the latest data from Mimecast, the bad guys are stepping up their impersonation game.

Ransomware Halts Production For Days At Major Airplane Parts Manufacturer

As a result of having IT systems crippled by the ransomware infection, the company has sent home approximately 1,000 of its 1,400 workers on paid leave.