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

Your KnowBe4 Compliance Plus Fresh Content Updates from April 2024

Apr 29, 2024 8:00:00 AM By Stu Sjouwerman

Check out the April updates in Compliance Plus so you can stay on top of featured compliance training content.

How an Athletic Director Exploited AI to Frame a Principal with Fabricated Racist Comments

Apr 26, 2024 10:15:06 AM By Stu Sjouwerman

In an unsettling turn of events, a high school athletic director in Maryland is accused of using artificial intelligence (AI) in a morally horrible manner.

US Justice Department Accuses Iranian Nationals of Launching Spear Phishing Attacks

Apr 26, 2024 8:20:23 AM By Stu Sjouwerman

The US Department of Justice has indicted four Iranian nationals for allegedly launching spear phishing attacks against the US government and defense contractors. In one instance, the ...

Your KnowBe4 Fresh Content Updates from April 2024

Apr 26, 2024 8:00:00 AM By Stu Sjouwerman

Check out the 33 new pieces of training content added in April, alongside the always fresh content update highlights, events and new features.

New Report Finds That 27% of Small Businesses Would Be Put Out of Business By A Cyber Attack

Apr 25, 2024 8:23:51 AM By Stu Sjouwerman

According to the U.S. Chamber of Commerce, the pressure is mounting on small and medium businesses (SMBs), as they must get their cyber preparedness correct or the next cyber attacks ...

AI-Assisted Phishing Attacks Are on the Rise

Apr 25, 2024 8:23:39 AM By Stu Sjouwerman

Threat actors are increasingly using generative AI tools to improve their phishing campaigns, according to a new report from Zscaler.

Phishing Campaign Exploits Nespresso Domain

Apr 23, 2024 11:37:04 AM By Stu Sjouwerman

Attackers are launching phishing campaigns using an open-redirect vulnerability affecting a website belonging to coffee machine company Nespresso, according to researchers at Perception ...

Global Optics Provider Hit with Ransomware Attack and a $10M Ransom

Apr 23, 2024 11:37:01 AM By Stu Sjouwerman

Global optics manufacturer Hoya had business operations at its headquarters and several business divisions impacted and is now facing a “No Negotiation / No Discount Policy” $10 million ...

USPS Surges to Take Top Spot as Most Impersonated Brand in Phishing Attacks

Apr 23, 2024 10:00:21 AM By Stu Sjouwerman

New data shows phishing attacks are deviating from the traditional focus on technology and retail sectors and are opting for alternate brands with widespread appeal.

CyberheistNews Vol 14 #17 [HEADS UP] LastPass Warns of a 'CEO' Deepfake Phishing Attempt

Apr 23, 2024 9:00:00 AM By Stu Sjouwerman

[NEW GAME] The Inside Man: New Recruits Game

Apr 22, 2024 4:21:06 PM By Stu Sjouwerman

We released a new game, now available on the KnowBe4 Modstore. I played it myself and this is recommended for all Inside Man fans! "Mark Shepherd, The Inside Man himself, is recruiting a ...

4 out of 5 of Physicians Were Impacted by February’s Cyber Attack on Change Healthcare

Apr 22, 2024 9:32:58 AM By Stu Sjouwerman

A new survey of physicians details the devastating impact of the Change Healthcare cyber attack on the healthcare sector.

Kudos! CEO Reveals He Got Phished

Apr 22, 2024 9:31:26 AM By Stu Sjouwerman

The other day I was participating in a company’s employee meeting when the CEO revealed he had been “caught” that morning by a real phishing attack email.

Half of U.K. Businesses Experienced a Security Breach or Cyber Attack in the Last 12 Months

Apr 19, 2024 9:04:17 AM By Stu Sjouwerman

Analysis of cyber attacks targeting U.K. organizations highlights the effectiveness of social engineering attacks and the fact that businesses are missing the mark on how to stop it.

Russian Threat Actor FIN7 Targeting the Automotive Industry with Spear Phishing Attacks

Apr 19, 2024 9:03:32 AM By Stu Sjouwerman

The cybercriminal threat actor FIN7 is launching spear phishing attacks against the automotive industry in the United States, according to researchers at BlackBerry.

LastPass Warns of Deepfake Phishing Attempt

Apr 18, 2024 8:39:22 AM By Stu Sjouwerman

Password Manager software developer LastPass warned that one of its employees was targeted by a social engineering attack that used an audio deepfake which impersonated the company’s CEO. ...

AI Voice Cloning and Bank Voice Authentication: A Recipe for Disaster?

Apr 18, 2024 8:39:02 AM By Stu Sjouwerman

New advancements in generative AI voice cloning come at a time when banks are looking for additional ways to authenticate their customers – and they’re choosing your voice.

KnowBe4 Named a Leader in the Spring 2024 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR) Software

Apr 17, 2024 8:00:00 AM By Stu Sjouwerman

We are excited to announce that KnowBe4 has been named a leader in the Spring 2024 G2 Grid Report for Security Orchestration, Automation, and Response (SOAR) for the PhishER platform for ...

Phishing Frenzy: Microsoft and Google Most Mimicked Brands in Cyber Scams

Apr 16, 2024 1:38:34 PM By Stu Sjouwerman

Microsoft and Google were the most frequently impersonated brands in phishing attacks during the first quarter of 2024, according to a report from Check Point.

Cisco Calls Out Organizations As Being “Overconfident and Unprepared” for Cyber Attacks

Apr 16, 2024 1:38:31 PM By Stu Sjouwerman

In a new report, Cisco says the cyber readiness of organizations is lacking despite having experienced multiple cyber attacks within the last year.

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