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

The Face Off: AI Deepfakes and the Threat to the 2024 Election

May 15, 2023 6:22:35 PM By Stu Sjouwerman

The Associated Press warned this week that AI experts have raised concerns about the potential impact of deepfake technology on the upcoming 2024 election. Deepfakes are highly convincing ...

The State of Organizational Cyber Defenses Impacts Cyber Insurance Availability, Cost, and Terms

May 15, 2023 2:25:35 PM By Stu Sjouwerman

A new report highlights the direct connection between how strong your organization’s security stance is and how easy it is to obtain cyber insurance.

FTC Warns of MetaMask and PayPal Phishing Campaigns

May 15, 2023 9:40:03 AM By Stu Sjouwerman

The US Federal Trade Commission has issued an alert warning of phishing campaigns that are impersonating PayPal and the MetaMask cryptowallet.

78% of Ransomware Victim Organizations Encounter Additional Threats-Turned-Extortions

May 15, 2023 8:09:59 AM By Stu Sjouwerman

New data sheds light on how likely your organization will succumb to a ransomware attack, whether you can recover your data, and what’s inhibiting a proper security posture.

Ransomware Gangs are “Big Game Hunting” as Victim Org Sizes and Ransom Payments Continue to Rise

May 15, 2023 8:09:55 AM By Stu Sjouwerman

Midsize and enterprise organizations take notice: the average and median amount of a ransom payment and the median size of the victim organization are on the rise.

Spain’s National Police Take Down a Phishing Gang

May 11, 2023 9:09:46 AM By Stu Sjouwerman

A phishing (by email) and smishing (by SMS text) operation in Madrid, Seville and Guadalajara has been taken down by the National Police of Spain. Over 40 arrests have been made on ...

Munich Re: "3x growth estimated in cyber crime costs over the next 4 years"

May 11, 2023 8:14:18 AM By Stu Sjouwerman

As cyber attacks continue to grow in sophistication and frequency, cyber insurers are expecting their market to double in the next two years.

U.K. Advance Fee Scams Increase by Over 600% in Less Than Two Years

May 11, 2023 8:14:13 AM By Stu Sjouwerman

New data from the U.K.’s Office of National Statistics shows that this often overlooked scam has grown significantly in interest – likely because it pays off.

Number of Ransomware Victim Organizations Nearly Doubles in March

May 10, 2023 10:51:43 AM By Stu Sjouwerman

New data shows a resurgence in successful ransomware attacks with organizations in specific industries, countries and revenue bands being the target.

King Charles Coronation Results in a Surge in Themed Scam Sites

May 10, 2023 10:51:40 AM By Stu Sjouwerman

The once-in-a-lifetime royal occurrence sparked countless websites designed to steal personal information and credit card details, causing security experts to issue warnings.

Business Email Compromise and “Confidential” Mergers and Acquisitions

May 10, 2023 10:07:25 AM By Stu Sjouwerman

A newly identified criminal organization has been observed running a large number of business email compromise (BEC) scams. Since February 2021, Abnormal Security reports the gang has ...

KnowBe4 Earns 2023 Top Rated Award from TrustRadius

May 10, 2023 10:00:00 AM By Stu Sjouwerman

We are proud to announce that TrustRadius has recognized KnowBe4 with a 2023 Top Rated Award.

[Finger on the Trigger] How the FBI Nuked Russian FSB's Snake Data Theft Malware

May 9, 2023 4:43:09 PM By Stu Sjouwerman

The Five Eyes member nations' cybersecurity and intelligence agencies dismantled the infrastructure of the Snake cyber-espionage malware that was operated by Russia's Federal Security ...

Q1 2023 Top-Clicked Phishing Report [INFOGRAPHIC]

May 9, 2023 10:03:14 AM By Stu Sjouwerman

KnowBe4's latest reports on top-clicked phishing email subjects have been released for Q1 2023. We analyze 'in the wild' attacks reported via our Phish Alert Button, top subjects globally ...

More InterPlanetary File System Services Use Also Means Phishing Abuse by Cybercriminals

May 9, 2023 9:01:02 AM By Stu Sjouwerman

The InterPlanetary File System (IPFS), a distributed file-sharing system that represents an alternative to the more familiar location-based hypermedia server protocols (like HTTPS), is ...

CyberheistNews Vol 13 #19 [Watch Your Back] New Fake Chrome Update Error Attack Targets Your Users

May 9, 2023 9:00:00 AM By Stu Sjouwerman

CyberheistNews Vol 13 #19 | May 9th, 2023 [Watch Your Back] New Fake Chrome Update Error Attack Targets Your Users Compromised websites (legitimate sites that have been successfully ...

Dallas Police Department is the Latest Victim of a Ransomware Attack

May 9, 2023 8:00:00 AM By Stu Sjouwerman

Unfortunately ransomware attacks have taken another victim. The City of Dallas recently confirmed that their police department suffered a ransomware attack. This attack shutdown essential ...

Blocking Social Engineering by Foreign Bad Actors: The Role of the New Foreign Malign Influence Center

May 8, 2023 7:02:01 AM By Stu Sjouwerman

The U.S. government created a new office to block disinformation. The new Foreign Malign Influence Center (FMIC) oversees efforts that span U.S. military, law enforcement, intelligence, ...

[Eye Opener] HTML Phishing Attacks Surge by 100% in 12 Months

May 7, 2023 11:57:55 AM By Stu Sjouwerman

The Cyberwire reported: "Barracuda released a study this morning indicating that HTML attacks have doubled since last year.

[On-Demand] A Master Class on IT Security: Roger Grimes Teaches You Phishing Mitigation

May 5, 2023 8:35:23 AM By Stu Sjouwerman

Phishing attacks have come a long way from the spray-and-pray emails of just a few decades ago. Now they’re more targeted, more cunning and more dangerous. And this enormous security gap ...

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