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

Ransomware Claims Are Up 50% in 2019 With Attacks Outpacing the Previous Five Years

According to cyber insurer Chubb, ransomware attacks are shifting industry focus and are becoming both more frequent and more expensive to address.

[Heads-up. This Is Ugly] After Refusing The Maze Ransomware Payment, Their Stolen Data Was Leaked

After a deadline was missed for receiving a ransom payment, the group behind Maze Ransomware has published almost 700 MB worth of data and files stolen from a security staffing firm. Our ...

French Hospital Crippled by Ransomware

Patient care at a large hospital in northern France has suffered considerably after a major ransomware attack at the weekend, according to local reports. The University Hospital Center ...

A massive international email scam netted $3 million worth of top-secret US military equipment

In a recent case first reported by Quartz, a crew of international cyber criminals allegedly convinced an unidentified US defense contractor to send them millions of dollars worth of ...

It's Happening The World Over: $300K Lost To Phone Scammer

A woman in Singapore lost $300,000 to a scammer posing as a Singtel customer service employee, according to the Straits Times. The scammer told the victim he would fix some problems with ...

An Australian Watering Hole (but in Canberra, not the Outback)

The Australian Federal Parliament suffered a malware infection earlier this year after some users fell victim to a watering hole attack, the Australian Broadcasting Corporation (ABC) ...

Cybercriminal Gang, Silent Starling, Creates New ‘Vendor Email Compromise’ Category

New attacks focus on organizations with global supply chains looking to trick a supplier’s customers into paying fake invoices and have already impacted 500 organizations worldwide.

Malware Delivered Via Fake Browser Updates Are Back and are More Sophisticated Than Ever

Leveraging vulnerable website content management platforms, these attacks seek to trick users into installing malware under the guise that their web browser is out-of-date.

Now HERE is an interesting Phishing Campaign!

It's a phishing campaign against phishing campaigns! :-D It's a public service program that educates organizations and societies globally on the greatest cyber risk of all - the falsehood ...

Ransomware Attack Hits Louisiana State Servers

Louisiana Governor John Bel Edwards on Monday revealed that a ransomware attack hit state servers, prompting a response from the state’s cyber-security team. The incident appears to have ...