Stu Sjouwerman

Chief Executive Officer & President

Stu Sjouwerman (pronounced “shower-man”) is the founder and CEO 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.

Books

Cyberheist E-Book

Find all of Stu's books on Amazon

Phishing Impersonation and Attack Trends in 2021

Mar 9, 2022 8:50:37 AM By Stu Sjouwerman

Facebook overtook Microsoft as the most impersonated brand in phishing attacks last year, according to a new report from Vade Secure.

CyberheistNews Vol 12 #10 [Heads Up] A New Phishing Attack Warns About A Suspicious Russian Login

Mar 8, 2022 9:16:18 AM By Stu Sjouwerman

[Heads Up] A New Phishing Attack Warns About A Suspicious Russian Login Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #10 | Mar. 8th., 2022 [Heads Up] A New Phishing ...

[World Premiere] KnowBe4’s New Season 4 of Netflix-Style Security Awareness Video Series - ‘The Inside Man’

Mar 8, 2022 8:30:14 AM By Stu Sjouwerman

We’re thrilled to announce the long-awaited fourth season of the award-winning KnowBe4 Original Series - ‘The Inside Man’ is now available in the KnowBe4 ModStore!

FBI: Ransomware gang breached 52 US critical infrastructure orgs

Mar 8, 2022 8:02:39 AM By Stu Sjouwerman

The US Federal Bureau of Investigation (FBI) says the Ragnar Locker ransomware gang has breached the networks of at least 52 organizations from multiple US critical infrastructure sectors.

By the Way, There's No Draft - Smishing Campaign Alert

Mar 7, 2022 9:48:53 AM By Stu Sjouwerman

Scammers are sending phony text messages (aka Smishing or SMS Phishing) informing people in the US that they’ve been drafted by the US Army, according to Army Times.

Log4j - Kevin Mitnick Explains One of the Most Serious Vulnerabilities in the Last Decade

Mar 7, 2022 8:00:00 AM By Stu Sjouwerman

The Log4j vulnerability caused widespread panic for IT professionals when it was uncovered. Sleepless nights followed for many. But a shortage of time and manpower has left this ...

Phishing Attacks Impersonating LinkedIn are up 232% in the Last Month Alone!

Mar 4, 2022 8:34:15 AM By Stu Sjouwerman

During the period the world has dubbed “the great resignation”, phishing scammers are shifting tactics to take advantage of those looking for a new career or place of employment.

FBI: Scammers Take Business Email Compromise Attacks to Virtual Meeting Platforms

Mar 4, 2022 8:34:12 AM By Stu Sjouwerman

In a new twist on an old scam, BEC attacks switch from email to a virtual meeting where social engineering tactics are used to further establish credibility and increase the likelihood of ...

CISA: 2021 Cyberattack Trends Indicate Increases in Global Ransomware Attacks

Mar 4, 2022 8:34:08 AM By Stu Sjouwerman

New advisory sees critical infrastructure once again in the crosshairs and makes critical recommendations to both protect against ransomware and to reduce its’ impact.

Your KnowBe4 Fresh Content Updates from February 2022

Mar 4, 2022 8:00:00 AM By Stu Sjouwerman

Check out the 28 new pieces of training content added in February, alongside the always fresh content update highlights and new features.

What It's Like to Be the Face of Romance (Scams)

Mar 3, 2022 8:40:41 AM By Stu Sjouwerman

A real US Army colonel named Daniel Blackmon is being impersonated in hundreds or even thousands of romance scams, according to Haley Britzky at Task & Purpose. The scammers took ...

Gain Insight into Where Your Organization Stands with the Security Culture Maturity Model

Mar 2, 2022 2:19:06 PM By Stu Sjouwerman

We’re thrilled to introduce the Security Culture Maturity Model, the industry’s first maturity model specifically geared to measure security culture!

Data Breach Volumes in the U.S. Grow by 10% in 2021

Mar 2, 2022 1:32:16 PM By Stu Sjouwerman

New data shows despite decreases in global data breach levels (-5%) in 2021, the U.S. experienced proportionally more data breaches than in the previous year.

Timely “Help Ukraine” Online Crypto Scams Take in Millions

Mar 2, 2022 1:32:00 PM By Stu Sjouwerman

A new series of "help Ukraine" donation posts have sprouted up across the Internet, but are really a cryptocurrency scam enticing users send crypto donations to counterfeit addresses.

FBI: SIM Swapping Attacks See More Than 500% Increases in The Number of Attacks and Monetary Losses

Mar 2, 2022 1:31:47 PM By Stu Sjouwerman

With mobile devices used as secondary authentication, threat actors have been stepping up activity, looking for ways to transfer phone numbers to cybercriminal-controlled devices.

UK ICO Sees a Massive Increase in Targeted Email Attacks

Mar 2, 2022 1:31:34 PM By Stu Sjouwerman

New data obtained from the UK’s Information Commissioner’s Office by think tank Parliament Street shows an unprecedented rise in attacks against the UK’s information rights organization.

Phishing Emails Warn of a Suspicious Login From Russia

Mar 2, 2022 8:48:36 AM By Stu Sjouwerman

Researchers at Malwarebytes warn that a phishing campaign is informing users that someone logged into their account from an IP address in Moscow. The email contains a button to report the ...

CyberheistNews Vol 12 #09 [Heads Up] The Ukraine War Started A New Wiper Malware Spillover Risk

Mar 1, 2022 2:07:44 PM By Stu Sjouwerman

[Heads Up] The Ukraine War Started A New Wiper Malware Spillover Risk Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #09 | Mar. 1st., 2022 [Heads Up] The Ukraine War ...

Scammers Will Take Advantage of New IRS Rules

Mar 1, 2022 9:42:52 AM By Stu Sjouwerman

New IRS requirements will soon be used as phishbait, according to Gene Marks, owner of Marks Group PC and a columnist for the Guardian.

Russia Could “Absolutely” Lash Out at US Through Cyber, Lawmaker Warns

Mar 1, 2022 6:49:52 AM By Stu Sjouwerman

NextGov reports: "Chairman Sen. Mark Warner, D-Va, gives an opening statement as FireEye CEO Kevin Mandia, SolarWinds CEO Sudhakar Ramakrishna and Microsoft President Brad Smith testify ...

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