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

Threat Actors Take Advantage of Exchange Online and Outlook on the Web with New Levels of Sophistication

New insight from Accenture Security highlights specific ways attackers are changing their tactics to make Microsoft’s email platform a tool rather than an obstacle for phishing attacks.

Another Office 365 OAuth Attack Targets Coinbase Users to Gain Compromised Email Access

The latest attack attempts to trick Office 365 users that use Coinbase into giving access to their mailbox via a Consent app rather than trying to steal their credentials.

The Risk of Redirector Domains in Phishing Attacks

Researchers at GreatHorn warn that a large-scale phishing campaign is using open redirects to evade email security filters. Open redirects allow attackers to take a URL from a ...

Security Awareness Training Compliance and .GOV

A customer sent me the following observation which is something I have been trying to get across for the last 10 years: "I found this interesting – and potentially disconcerting. This ...

The Secret to This Email Phishing Campaign is Volume

FireEye says a newly characterized cybercriminal gang, FIN11, has been launching widespread email phishing campaigns for the past four years. The group isn’t particularly sophisticated, ...

Q3 2020 Top-Clicked Phishing Subjects: Coronavirus-Related Attacks Still Prevalent [INFOGRAPHIC]

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. These are broken down into three different categories: social media related subjects, general subjects, ...

Two-Month Email Compromise and Impersonation Attack Results in a $15M Take

Read how one unnamed company fell victim to a scam that’s been repeated many times over the last few years, but never with such a massive payoff at the end.

Fake Social Media Verification Scams Are the Gateway to Something Much More Sinister

Using copyright violation threats or the lure of obtaining a blue checkmark to verify your account, the latest scams easily trick victims out of their social media credentials.

FINRA Yet Again Becomes the Impersonated Brand at the Center of Phishing Attacks on Brokerage Firms

A mix of domain, phishing emails, a dash of social engineering, and a survey are the recipe for a simple and yet effective campaign targeting the financial sector.

[HEADS UP] Ransomware Attacks Skyrocket During COVID-19

2020 has been no match for organizations worldwide, including the significant increase of ransomware attacks during the COVID-19 pandemic. As organizations continue to work in a remote ...