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

1 in 7 Ransomware Extortion Leaks Include Sensitive Operational Technology Details

Feb 2, 2022 3:51:37 PM By Stu Sjouwerman

New analysis of published data from ransomware attacks puts the spotlight on the potential that some of your most critical data stolen puts you materially at risk of another attack.

Opinion: Is Your Cyber Insurance Going To Cover “Cyber War”?

Feb 2, 2022 3:50:42 PM By Stu Sjouwerman

With the lines increasingly blurred between whether a cyber attack is “state sponsored” or just a malicious group of individuals, we’re likely going to see more denials of claims.

KnowBe4 Unveils Official Trailer for ‘The Inside Man’ Season 4

Feb 2, 2022 8:00:00 AM By Stu Sjouwerman

We’re excited to announce the release of the official trailer for Season 4 of the award-winning Knowbe4 Original Series - ‘The Inside Man’!

COVID-19 Test-Related Phishing Scams Jump 521% Into January

Feb 1, 2022 2:40:11 PM By Stu Sjouwerman

New data shows a massive increase between October 2021 and January 2022 in phishing attacks focusing on one of the world’s current concerns for home and in-office testing.

8 New Malware Payloads Spotted As Part of Attacks Against Ukrainian Targets

Feb 1, 2022 2:40:07 PM By Stu Sjouwerman

Security Threat Researchers at Symantec have published details about malware being put out by the “Gamaredon” threat group (who have been tied to Russian Federal Security Service), ...

New Phishing Campaign is Impersonating Zoom to Steal Credentials

Feb 1, 2022 2:40:04 PM By Stu Sjouwerman

A phishing campaign is impersonating Zoom in order to steal users’ Microsoft credentials, according to Lauryn Cash at Armorblox. The emails landed in about 10,000 inboxes, and targeted “a ...

CyberheistNews Vol 12 #05 [Heads Up] DHS Sounds Alarm on New Russian Destructive Disk Wiper Attack Potential

Feb 1, 2022 9:37:29 AM By Stu Sjouwerman

CyberheistNews Vol 12 #05 | Feb. 1st., 2022 [Heads Up] DHS Sounds Alarm on New Russian Destructive Disk Wiper Attack Potential CNN just reported on a Jan 23 Intelligence Bulletin from the ...

Increased “Shipping Delays” Now Served as Phishbait

Jan 31, 2022 9:16:14 AM By Stu Sjouwerman

Attackers are exploiting pandemic-related supply-chain disruptions to launch phishing campaigns, according to Troy Gill, senior manager of threat intelligence at Zix. In an article for ...

KnowBe4 Continues to be One of Okta's Most Popular Apps in the 2021 Businesses at Work Report

Jan 28, 2022 10:11:32 AM By Stu Sjouwerman

We're pleased to announce that we have been featured in Okta's eighth edition of the "Business at Work" report. This report is an in-depth look into how organizations and people work ...

[On-Demand Webinar] A Data-Driven Approach for Your Third-Party Risk Management Processes

Jan 27, 2022 2:31:27 PM By Stu Sjouwerman

As organizations have increased their scope of vendors and partners, they have also increased their digital risk surface and are facing new challenges regarding vendor risk management. By ...

Microsoft Warns of Latest “Consent Phishing” Attack Intent on Reading Your Email

Jan 27, 2022 9:13:57 AM By Stu Sjouwerman

Rather than steal your user’s credentials, this latest attack takes the OAuth route to gain access to the victim’s mailbox. This gives cybercriminals continual access, regardless of ...

Dark Web Service Sells Access to Compromised Accounts and Browser Sessions

Jan 27, 2022 9:13:53 AM By Stu Sjouwerman

When we hear about compromised credentials, there’s always the question of “How are they used post-compromise?” In one case, they are fully on display for sale to the highest bidder.

Malicious Office Documents Jump to 37% of All Malware Downloads at the End of 2021

Jan 27, 2022 9:13:49 AM By Stu Sjouwerman

With the ubiquitous use of Microsoft Office today, it should come as no surprise that malicious macro-laden documents continue to reign, with PPT files delivering AgentTesla taking the ...

[Heads Up!] DHS Sounds Alarm on New Russian Destructive Disk Wiper Attack Potential

Jan 27, 2022 8:01:08 AM By Stu Sjouwerman

CNN just reported on a Jan 23 Intelligence Bulletin from the US Department of Homeland Security (DHS) that warned state and local governments and critical infrastructure operators about ...

Ransomware Operators Try to Recruit Insiders

Jan 26, 2022 8:37:30 AM By Stu Sjouwerman

Sixty-five percent of organizations report that their employees have been contacted by ransomware attackers in an attempt to recruit insider threats, according to researchers at Pulse and ...

Irish Teaching Council Fined €60,000 for Phishing-Induced Breach

Jan 25, 2022 10:30:43 AM By Stu Sjouwerman

Ireland’s Teaching Council has been fined €60,000 by the country’s Data Protection Commission (DPC) over a breach of nearly ten thousand teachers’ data, the Irish Examiner reports. An ...

CyberheistNews Vol 12 #04 [FBI HEADS UP] US Defense Industry Targeted with New USB-Based Ransomware Attacks

Jan 25, 2022 9:17:54 AM By Stu Sjouwerman

[New Benchmarking Feature] Compare Your Organization’s Security Culture with Other Organizations in Your Industry

Jan 25, 2022 8:00:00 AM By Stu Sjouwerman

We are excited to announce that the KnowBe4 Industry Benchmarking feature has been expanded to now include industry benchmark comparison data for KnowBe4’s Security Culture Survey (SCS).

A Generational Divide Among Social Engineering Victims

Jan 24, 2022 9:11:49 AM By Stu Sjouwerman

Younger and older people differ in their susceptibility to different types of social engineering attacks, according to researchers at Avast. Younger people tend to fall for scams ...

FBI: US Defense Industry Organizations Targeted with USB-Based Ransomware Attacks

Jan 21, 2022 8:24:40 AM By Stu Sjouwerman

Using mailed out “BadUSB” drives as the initial attack vector, cybercriminals are attempting to infiltrate sensitive networks and infect them with BlackMatter or REvil ransomware strains.

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