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

43,000+ NHS Staff Hit With Phishing Emails Since March

A Freedom of Information (FOI) request revealed that over 43,000 National Health Service (NHS) staff have had phishing emails slip through the cracks and into their inboxes in the past ...

COVID-Themed Phishing Scams Are on Their Way Out While Some Scammers Use a Vaccine as a Last-Ditch Effort

The latest data on COVID-related phishing scams from security researchers at CheckPoint comes with some good news and insightful trends that may help keep you secure.

Having a Wonderful Time, Wish Your Data Were Here

The US Department of Health and Human Services (HHS) Office for Civil Rights (OCR) issued an alert warning that someone is impersonating the OCR and sending fraudulent postcards to ...

[On-Demand] The Best Ways to Stop Malware and Ransomware That No One Else Will Tell You

With malware attacks on the rise, making sure you keep your organization safe from a costly breach is a top priority. The two best things you can do to stop malware and ransomware attacks ...

Pressure, Peer and Otherwise: Ransomware and Data Theft Go Hand-In-Hand

Data theft is now a well-established element of ransomware attacks, according to John Shier, a Senior Security Expert at Sophos. In a blog post (summarized by iTwire), Shier noted that in ...

My lazy Sunday afternoon was interrupted...

My lazy Sunday afternoon was interrupted with what appeared to be a prank, a social engineering attempt, or something else that remains to be identified.

Paying the Ransom After a Ransomware Attack May Become More Complicated, Thanks to the U.S. Treasury

With many organizations considering to pay the ransom should they experience an attack, new guidance from the U.S. Treasury may put a damper on an organization’s ability to pay.

[Heads Up] Apparently Slack Phishing Got So Bad They Had To Do Something About It

Slack has announced a slew of new security features, certificates and integrations, including a verification system that adds an additional layer to protect against phishing scams.

Cybercriminals Target Execs in Microsoft 365 Credential Attack to Launch Internal BEC Scams

A new phishing attack spotted in the wild by security researchers at Trend Micro demonstrates how compromised data in an initial cyberattack is purposed in subsequent attacks.