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

Just How Far Can Three Cybercriminals Reach? How about 150 Countries!

As three members of the cybercriminal group TMT were recently arrested, details emerge around the breadth and depth of their attacks from a year-long Interpol investigation.

Check Point Says to Expect More Shipping and Delivery Phishing Emails This Season

With in-person shopping still considered “high risk”, online shopping with home delivery and the need to meet delivery deadlines creates the perfect scenario for scammers.

Who’s on the Phone? It’s the Ransomware Guys “Encouraging” You to Pay the Ransom!

Since August of this year, some ransomware attacks are being followed up by phone calls to increase pressure, promote the attack internally, and increase the chances of getting paid.

Updates on Vishing

Voicemail scams are on the rise, according to Paul Ducklin at Naked Security. These scams are a form of voice phishing (“vishing”) in which scammers churn out automated phone calls and ...

GDPR Compliance Scams Rising

Organizations need to be on the lookout for GDPR-themed phishing lures, according to Mike Puglia, Chief Product Officer at Kaseya. In an article for ITProPortal, Puglia explains that GDPR ...

You know it's going to be a long day when...

…you’re sending out emails like the below to all staff at 8 in the morning.

Election-themed Phishing is Likely to Persist

The US elections have come and gone, but people should still be on the lookout for election-themed phishbait, according to Roger Kay at Inky. Emotions are still running high in the US, ...

Phishing Campaign Targets COVID Vaccine Cold Supply Chain

Researchers at IBM’s X-Force have identified a phishing campaign targeting the COVID-19 vaccine “cold chain” (the part of the supply chain focused on “the safe preservation of vaccines in ...

Ransomware Gangs Are Now Cold-Calling Victims If They Restore From Backups Without Paying

Catalin Cimpanu at ZDNet reported on another evil escalation in ransomware extortion tactics. In attempts to put pressure on victims, some ransomware gangs are now cold-calling victims on ...

Exploits Leveraging Excel 4.0 Macros Increase as Organizations Continue to Rely on this Legacy Technology

Despite being nearly 30 years old, Excel’s very functional macro technology appears to be a little too functional, as attackers have stepped up its use to advance cyberattacks.