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

Phorpiex Botnet Attacks Spike So High in June, 2% of *All* Organizations Were Hit

The rise in the use of this dangerous botnet, notorious for distributing malware via phishing campaigns and responsible for fueling Sextortion scams, should put organizations on edge.

Expect to See Data Theft as Part of More Ransomware Attacks in the Future

With data theft currently experienced in 10% of ransomware attacks, experts predict this trend to increase as cyber criminals look for ways to ensure ransom payment.

Impermissible: Be Suspicious of Permission Requests

Users need to be wary of requests for information or permissions, even if they appear to come from legitimate sources, according to Don MacLennan, Senior Vice President of Engineering and ...

Microsoft Warns of Application-based Phishing

Microsoft has issued an advisory warning about “consent phishing,” or application-based phishing attacks that rely on users granting permissions to malicious apps. These attacks aren’t as ...

[Heads Up] Twitter Employees Fall For Social Engineering Attack And The Bad Guys Get "God Mode"

A number of high-profile Twitter accounts were hacked including those of Elon Musk, Bill Gates, Kanye West, Joe Biden and Barack Obama. This is clearly the worst hacking incident in ...

SEC Issues Warning on Increased Ransomware Attacks

The Securities and Exchange Commission, through its Office of Compliance Inspections and Examinations (OCIE), issued a warning to advisors and broker-dealers to “immediately” review their ...

KnowBe4 Finds Coronavirus-Themed Phishing Spiked in Q2 2020 [INFOGRAPHIC]

The latest results of KnowBe4's quarterly top-clicked phishing email subjects are in. We report on three different categories: social media related subjects, general subjects, and 'in the ...

[ALERT] More Than 10% of Ransomware Attacks Now Involve Data Theft / Data Breach

Research into recent ransomware submissions from TripWire revealed that more than a tenth of crypto-malware infections now involve some element of data theft.

Scammers Impersonate Hospital Personnel

Scammers are seeking to obtain personal information by impersonating Canadian hospital staff over the phone, NEWS 1130 reports. Vancouver Coastal Health issued an alert in which the ...

The Bad News: Only 5% of Your Users Can Effectively Spot a Phishing Attack

A recent phishing quiz promoted to U.K. users to see if they could identify the phish revealed dismal results where nearly all users couldn’t tell the difference 100% of the time.