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

This ransomware asks victims to name their own price to get their files back

Attackers behind this form of file-encrypting malware - which has similarities with Locky - think that if the victim can set their own price, they're more likely to pay. A form of ...

48 Servers Of North Carolina County Held Hostage by LockCrypt Ransomware

A hacker’s 1 p.m. deadline to pay $23,000 passed Wednesday, and Mecklenburg County has not decided whether to pay the ransom for a cyber-attack that “paralyzed” the county. County manager ...

Cyber Warfare in 140 Characters: Social Media Weaponized

David Patriakos's new book about cyber warfare is a fascinating read. From the back cover: "Modern warfare is a war of narratives, where bullets are fired both physically and virtually. ...

KnowBe4 Prevents Customer From Becoming Social Engineering Victim Of Duke Energy Vendor’s Hack

A customer just sent us this: "Stu, the company who processes payments for Duke Energy’s walk in payments was hacked and as a result about 375,000 bank accounts may have been stolen. "We ...

Which of Your Employees Are Most Likely to Expose Your Company to a Cyber Attack?

Kon Leong at Harvard Business Review wrote an excellent article about the problem of employees exposing your organization to cyberthreats through human error. Here is a short qoute:

Phishing Schemes Are Using Encrypted Sites To Seem Legit

WIRED wrote: "A MASSIVE EFFORT to encrypt web traffic over the last few years has made green padlocks and "https" addresses increasingly common; more than half the web now uses internet ...

Mailsploit Bypasses DMARC And Lets Attackers Send Spoofed Phishing Emails on Over 33 Email Clients

Our friends at Bleepingcomputer reported on something that should cause anyone concern. German security researcher Sabri Haddouche has discovered a set of vulnerabilities that he ...

KnowBe4 Wins Frost & Sullivan Cyber Security Awareness Training Platform Customer Value Leadership Award

I'm extremely pleased to tell you we have won a prestigious award. Frost & Sullivan is a global research and consulting firm and they recently announced that we received their 2017 ...

Scam Of The Week: Phishers Target PayPal Users With Fake “Failed Transaction” Emails

Scammers are pushing out fake PayPal emails that use the premise of an unverified transaction to phish for customers’ personal and financial information. With the end-of-the-year holidays ...