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

Do Ransomware Gangs Restore Data, Even After They're Paid?

Only 8% of ransomware victims get all of their data back after paying the ransom, according to researchers at Sophos. The researchers found that, on average, victims who pay the ransom ...

The Cost of Remediating a Ransomware Attack More than Doubles and is Quickly Approaching $2 Million

With 54% of organizations unable to stop a ransomware attack before data is encrypted and operations are impacted, the increasing cost of ransomware remediation is troubling.

U.K. Royal Mail-related Phishing Scams Are Up 645%

New data from CheckPoint highlights how scammers are using simple shipping-related social engineering scams to trick victims into giving up personal information and credit card details.

Ransomware Operators Threaten to Short Victims’ Stocks

The Darkside ransomware operators are now offering to tip off unscrupulous stock traders before they post the names of publicly traded victim companies, the Record reports. The criminals ...

Ransomware Demands Spike by 43% Already in 2021

Cybercriminal groups are increasing their automated and tactical ransomware attacks. Unfortunately, that also means they have an increase in greed.

[HEADS UP] Ransomware Gangs are Creating Ransomware Cartels

Analysis by threat intelligence group Analyst1 recently uncovered that the bad guys are responsible for forming a ransomware cartel.

Scammers Target Rogers Customers With SMS Messages

Scammers are targeting Rogers customers with text messages offering $50 refunds, according to BleepingComputer. The Canadian telecommunications provider suffered a widespread outage last ...

Federal Reserve Chairman Jerome Powell Cites Cyberthreats as Current “Biggest Concern” to Financial Institutions

Fears of a resurgence of COVID-19 and increased cyberattacks are mentioned as top risks that can materially impact the finance sector and the economy, by Jerome Powell in a recent ...

Researchers Warn of EtterSilent Facilitating Risky Malware Delivery

Cybercriminals are using a new malicious document builder dubbed “EtterSilent,” according to researchers at Intel 471. The builder is used to craft Microsoft Office documents with macros ...