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

Initial Access Broker Activity Doubles in One Year’s Time

Nov 27, 2023 2:00:13 PM By Stu Sjouwerman

New data sheds light on just how active the Initial Access Broker (IAB) business is, and the growth uncovered doesn’t bode well for potential victim organizations.

Huntress Finds Business Email Compromise (BEC) Increases In Q3, 2024

Nov 27, 2023 2:00:05 PM By Stu Sjouwerman

Huntress has released a report finding that business email compromise (BEC) attacks have risen in the third quarter of 2023.

New Data Covers How the Retail Market is at Greater Risk of Industry-Specific Cyberthreats

Nov 22, 2023 4:04:08 PM By Stu Sjouwerman

A new analysis of the retail market’s threat landscape discusses the challenges faced by this industry and what threat tactics are being used to take advantage of retail’s cyber ...

Digital Skimming Increases by 50%, Just in Time for the Holiday Season

Nov 22, 2023 4:03:50 PM By Stu Sjouwerman

Security researchers identify growth in the use of an ongoing cyberskimming campaign that involves compromising legitimate website checkout code.

Phishing Attacks Expected to More Than Double During the Black Friday and Cyber Monday Shopping Week

Nov 22, 2023 2:13:32 PM By Stu Sjouwerman

Another day, another warning about holiday scams! Lookout Inc., a data-centric cloud security company, is warning employees and businesses that phishing attacks are expected to more than ...

Visa Warns of Increased Phishing Scams During Holiday Season

Nov 22, 2023 2:13:10 PM By Stu Sjouwerman

Visa Payment Fraud Disruption (PFD) expects phishing attacks to increase between November 2023 and January 2024. Findings in its Holiday Edition Threats Report outline the popular fraud ...

Old Bloomberg Crypto Account Bio Link Used in Discord Phishing Attack

Nov 21, 2023 4:25:38 PM By Stu Sjouwerman

Scammers used an outdated link found in an X (formerly Twitter) account belonging to Bloomberg Crypto to send users to a phishing site designed to steal Discord credentials, ...

73% of Organizations Affected by Ransomware Attacks Globally in 2023, According to Statista

Nov 21, 2023 4:25:14 PM By Stu Sjouwerman

I recently wrote about how 1 in 34 organizations globally has experienced an attempted ransomware attack. But that statistic doesn’t provide enough context around the impact felt by the ...

CyberheistNews Vol 13 #47 [Heads Up] FBI Warning: How Callback Phishing Makes It Past All Your Filters

Nov 21, 2023 9:00:00 AM By Stu Sjouwerman

With Expected Increases of Holiday Sales Comes Similar Expectations of More Cyber Scams

Nov 20, 2023 3:08:48 PM By Stu Sjouwerman

If increases in cyberattacks this year are any indication of what to expect in the next six weeks of holiday shopping, we should expect a massive uptick in holiday-related scams.

Cybercrime Group "Scattered Spider" is a Social Engineering Threat

Nov 20, 2023 3:08:35 PM By Stu Sjouwerman

The US Cybersecurity and Infrastructure Security Agency (CISA) and the FBI have released a joint Cybersecurity Advisory describing the Scattered Spider cybercriminal gang’s activities.

KnowBe4 Integrates With Cisco Duo To Streamline Secure Sign Ins

Nov 17, 2023 10:56:46 AM By Stu Sjouwerman

Social engineering remains one of the top attack vectors that cybercriminals use to execute malicious acts. KnowBe4’s security awareness training and simulated phishing platform allows ...

Johnny Jet's $3,000 Podcast Scam Nightmare – Unveiling the Elaborate Con that Hijacked his Facebook Kingdom

Nov 17, 2023 10:14:29 AM By Stu Sjouwerman

Travel influencer Johnny Jet has disclosed that he fell victim to a scam that caused him to lose access to his Facebook account, which has tens of thousands of followers. The scammers ...

QR Code Phishing Attacks Surging

Nov 17, 2023 10:14:02 AM By Stu Sjouwerman

The massive uptick in QR Code phishing is an indicator that scammers are seeing success in taking victims from the initial attack medium to one under the attacker’s control.

[Keynote Announcement] See Rachel Tobac at KB4-CON 2024!

Nov 17, 2023 8:00:00 AM By Stu Sjouwerman

We can’t keep this a secret any longer! Rachel Tobac will be joining us live at KB4-CON 2024, happening in Orlando, Florida March 4-6. She’s an ethical hacker and three time winner of DEF ...

BlackCat Ransomware's New SEC Reporting Tactic: Turn Regulations Against Victims

Nov 16, 2023 4:42:05 PM By Stu Sjouwerman

Man Bites Dog: In an unusual twist in cybercrime, the ransomware group BlackCat/ALPHV is manipulating the SEC's new 4-day rule on cyber incident reporting to increase pressure on their ...

How to Help "Frequent Clickers" Become More Mindful

Nov 16, 2023 1:58:59 PM By Stu Sjouwerman

Within our organizations, there are those employees who consistently exhibit mindfulness, avoiding every phishing attempt. Yet, there are also those users who, despite repeated education ...

AI-Manipulated Media Through Deepfakes and Voice Clones: Their Potential for Deception

Nov 15, 2023 12:22:47 PM By Stu Sjouwerman

Researchers at Pindrop have published a report looking at consumer interactions with AI-generated deepfakes and voice clones.

It’s Official: Scams Via Email and Text are Inescapable as Nearly Every American Receives Fake Messages Daily

Nov 15, 2023 12:22:43 PM By Stu Sjouwerman

New findings show that the overwhelming majority of people have to sort through scam messages and texts.

Online Scammer Poses as Skype, Swindles Victims Through Cryptocurrency Scam

Nov 14, 2023 2:01:21 PM By Stu Sjouwerman

Researchers at SlowMist describe a phishing campaign that’s distributing a phony version of Skype in order to steal cryptocurrency, Cointelegraph reports. The malicious app was likely ...

Security Awareness Training Blog

View Topics