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

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 ...

Wartime Suffering as Phishbait

Feb 28, 2022 10:45:46 AM By Stu Sjouwerman

It’s easy to forget, when a hybrid war like the one currently raging in Ukraine is occupying so much attention, that ordinary criminal lowlifes continue to seek victims, and the war only ...

[EYES OPEN] The Kremlin Propaganda Machine Now Works Overtime. INFOGRAPHIC

Feb 27, 2022 8:26:32 AM By Stu Sjouwerman

With an ongoing land war in Ukraine, everyone needs to be alert for the Kremlin's parallel disinformation campaigns. Many people simply are not aware of the massive amount of false data ...

[Heads Up] The Ukraine War Started A New Wiper Malware Spillover Risk

Feb 25, 2022 7:12:46 AM By Stu Sjouwerman

The war in Ukraine increases the risk of wiper malware to spill over. I'm sure you remember NotPetya, which caused billions of dollars of downtime damage. The WSJ reports that Symantec ...

When the Phishers Want a Reply, not a Click

Feb 23, 2022 9:46:21 AM By Stu Sjouwerman

A sextortion phishing campaign is targeting French speakers accusing them of viewing child abuse content, according to Paul Ducklin at Naked Security. The emails purport to come from the ...

CyberheistNews Vol 12 #08 [Eye Opener] Here Are the 4 Traits of Most Scams

Feb 22, 2022 9:52:39 AM By Stu Sjouwerman

CyberheistNews Vol 12 #08 | Feb. 22nd., 2022 [Eye Opener] Here Are the 4 Traits of Most Scams Written by Roger Grimes There are a lot of scams in the world, and they seem to be ...

New Phishing Campaign Angles for Monzo Banking Customers

Feb 22, 2022 9:02:06 AM By Stu Sjouwerman

A phishing campaign is targeting users of the UK-based digital banking company Monzo, BleepingComputer reports. Security researcher William Thomas came across an SMS phishing (smishing) ...

20 Year-Old “Right-to-Left Override” Functionality Used in Attacks to Trick Microsoft 365 Users Out of Credentials

Feb 22, 2022 9:01:58 AM By Stu Sjouwerman

Used to disguise malicious file extensions, this legacy functionality is being repurposed in attacks to obfuscate attachment types and steal credentials in an impressive way.

New QBot Attack Only Takes 30 Minutes to Elevate Privileges and Steal Data

Feb 22, 2022 9:01:50 AM By Stu Sjouwerman

This banking trojan-turned-information-stealer has been around for nearly 15 years. But its latest iteration – seen even in the past few weeks – has stepped up in its’ ability to act ...

Phishing Campaign Targets NFT Speculators

Feb 21, 2022 2:50:06 PM By Stu Sjouwerman

Scams follow fashion because money follows fashion. So it’s no surprise that non-fungible tokens (NFTs), which have become a hot speculative property, have drawn scam artists for phishing ...

[Heads Up] There Is A Whole New Type of Blockchain Scam Called "Ice phishing"

Feb 20, 2022 2:56:23 PM By Stu Sjouwerman

In a post Wednesday last week, Microsoft issued a warning that they are seeing a brand new type of blockchain-centric attack aimed at web3 -- a term used to describe the decentralized ...

Conti Ransomware Attacks Reap in $180 Million in 2021 as Average Ransomware Payments Rise by 34%

Feb 17, 2022 10:08:55 AM By Stu Sjouwerman

New analysis of ransomware attacks shows growth in the number of active strains, ransoms collected, and use of third-party services all adding up to a more organized and profitable ...

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