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

Sextortion Email Scams Now Include Threats to Infect Victims with COVID-19

In what may be either a moment of brilliance or desperation, scammers are attempting to use coronavirus infection threats as a means of further convincing victims to pay up.

New Potential Phishing Scam Begins with A Phone Call

A recent suspicious phone call was brought to our attention. It looks to be the beginning of a phishing campaign and demonstrates the lengths cybercriminals will go to in order to ensure ...

Trends in Phishing, as Seen From a Mountain View

Researchers from Google’s Threat Analysis Group (TAG) released details on recent state-sponsored phishing campaigns from around the world. The researchers said that Google’s phishing ...

Who Doesn’t Like Free Money? Scammers Are Expected to Increase Use of the COVID Stimulus Bill to Line their Pockets

With cybercriminals loving to be able to target victims where money is directly involved, security experts are anticipating a massive uptick in Stimulus-related scams.

Bad Guys Push New COVID-19 Message: You Are Infected

Malicious actors continue to craft ruthlessly aggressive, evil email attacks tailored to leverage mounting fears and anxieties surrounding the COVID-19 outbreak in the United States among ...

New Video Module "Covid-19 Best Practices" from KnowBe4 and Transperfect

Here is a quick announcement!

Hospitality Provider the Target of an Old-School BadUSB Social Engineering Attack

In what appears to be a mix of old- and new-school social engineering, an attack spotted in the wild using a USB thumb drive offers us a view into how one company could have become the ...

Scammers Hijacking Twitter Accounts To Sell Face Masks

Scammers cashing in on the Coronavirus crisis are now hijacking Twitter accounts to heavily promote a web site purporting to sell face masks, respirators, digital thermometers, and toilet ...

The Creation & Development of a COVID-19 Phish

As we documented in a recent blog piece, malicious actors are aggressively exploiting the COVID-19 crisis by re-purposing and overhauling phishing emails they were running before the ...

[HEADS UP] Cybercriminals Attempt to Exploit Stimulus Package for COVID-19

In several recent blog posts we've showed you the myriad ways in which malicious actors have aggressively -- even ruthlessly -- deployed social engineering tactics to leverage the ...