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

FBI: SIM Swapping Attacks See More Than 500% Increases in The Number of Attacks and Monetary Losses

With mobile devices used as secondary authentication, threat actors have been stepping up activity, looking for ways to transfer phone numbers to cybercriminal-controlled devices.

UK ICO Sees a Massive Increase in Targeted Email Attacks

New data obtained from the UK’s Information Commissioner’s Office by think tank Parliament Street shows an unprecedented rise in attacks against the UK’s information rights organization.

Phishing Emails Warn of a Suspicious Login From Russia

Researchers at Malwarebytes warn that a phishing campaign is informing users that someone logged into their account from an IP address in Moscow. The email contains a button to report the ...

CyberheistNews Vol 12 #09 [Heads Up] The Ukraine War Started A New Wiper Malware Spillover Risk

[Heads Up] The Ukraine War Started A New Wiper Malware Spillover Risk Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #09 | Mar. 1st., 2022 [Heads Up] The Ukraine War ...

Scammers Will Take Advantage of New IRS Rules

New IRS requirements will soon be used as phishbait, according to Gene Marks, owner of Marks Group PC and a columnist for the Guardian.

Russia Could “Absolutely” Lash Out at US Through Cyber, Lawmaker Warns

NextGov reports: "Chairman Sen. Mark Warner, D-Va, gives an opening statement as FireEye CEO Kevin Mandia, SolarWinds CEO Sudhakar Ramakrishna and Microsoft President Brad Smith testify ...

Wartime Suffering as Phishbait

It’s easy to forget, when a hybrid war like the one currently raging in Ukraine is occupying so much attention, that ordinary criminal lowlifes continue to seek victims, and the war only ...

[EYES OPEN] The Kremlin Propaganda Machine Now Works Overtime. INFOGRAPHIC

With an ongoing land war in Ukraine, everyone needs to be alert for the Kremlin's parallel disinformation campaigns. Many people simply are not aware of the massive amount of false data ...

[Heads Up] The Ukraine War Started A New Wiper Malware Spillover Risk

The war in Ukraine increases the risk of wiper malware to spill over. I'm sure you remember NotPetya, which caused billions of dollars of downtime damage. The WSJ reports that Symantec ...

When the Phishers Want a Reply, not a Click

A sextortion phishing campaign is targeting French speakers accusing them of viewing child abuse content, according to Paul Ducklin at Naked Security. The emails purport to come from the ...