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.

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APT Group Use Voice-Changing Software to Impersonate Women as Part of Espionage Attacks

Apr 9, 2021 8:34:02 AM By Stu Sjouwerman

The middle eastern threat group known as APT-C-23 are targeting male soldiers in the Israel Defense Forces in an attempt to get their victims to download and install malware.

New Phishing Attacks Bypass Secure Email Gateways Using Some Very Creative Methods

Apr 9, 2021 8:33:56 AM By Stu Sjouwerman

Microsoft Security Intelligence warns of phishing attacks being sent from legitimate email addresses and IP ranges, taking advantage of gateway configuration settings to ensure delivery.

LinkedIn Data of 500 Million Users Hacked, Up For Sale: Report

Apr 9, 2021 8:07:48 AM By Stu Sjouwerman

Microsoft-owned social network LinkedIn is reportedly the latest victim of a massive data breach where data of 500 million user profiles has been allegedly leaked by cybercriminals. The ...

Phishing Attacks Using PDF Files Have Skyrocketed

Apr 8, 2021 8:54:33 AM By Stu Sjouwerman

Phishing attacks using PDF files have spiked over the past year, according to researchers at Palo Alto Networks’ Unit 42.

The Clop #Ransomware gang is now pressuring customers of victims threatening that their personal, confidential data will be exposed unless a ransom is paid

Apr 7, 2021 8:29:14 AM By Stu Sjouwerman

Brian Krebs just reported: "Some of the top ransomware gangs are deploying a new pressure tactic to push more victim organizations into paying an extortion demand: Emailing the victim’s ...

The Growing WeTransfer Phishing Campaign Can Put Your Users at Risk

Apr 7, 2021 8:28:36 AM By Stu Sjouwerman

Researchers at Avanan have observed a phishing campaign that’s impersonating the WeTransfer file-sharing app in an attempt to steal users’ credentials. The email’s subject line states, ...

[HEADS UP] New Phishing Attack With .TXT Attachment Can Steal All Your Secrets

Apr 6, 2021 10:28:13 AM By Stu Sjouwerman

The 360 security blog just came up with an eye opener. Recently, 360 Security Center’s threat monitoring platform has detected a new email phishing attack. This attack uses a ...

CyberheistNews Vol 11 #14 [Heads Up] Phishing Remains the Most Common Form of Attack

Apr 6, 2021 9:42:24 AM By Stu Sjouwerman

[Security Culture Report 2021] A Global Security Culture Perspective During a Pandemic

Apr 6, 2021 9:35:21 AM By Stu Sjouwerman

The 2021 KnowBe4 Security Culture Report is the largest study of its kind, measuring organizations' security cultures and surveying more than 320,000 employees across 1,872 organizations ...

UK Users Should Be Aware of Census-Themed Phishing Attacks

Apr 6, 2021 8:20:03 AM By Stu Sjouwerman

Users in the UK should be on the lookout for census-themed phishing attacks, according to Paul Ducklin at Naked Security. Participating in the census is mandatory in the UK, and people ...

[HEADS UP] Millions of Facebook Users' Personal Information Has Been Leaked Online

Apr 5, 2021 9:18:20 AM By Stu Sjouwerman

A hacking forum recently published over 553 million personal data of Facebook users. The type of exposed data ranged from phone numbers, Facebook ID's, full names, locations, birthdates, ...

Expect More Travel-Related Phishing as the Pandemic Subsides

Apr 5, 2021 8:36:08 AM By Stu Sjouwerman

People need to be wary of travel-related phishing as the pandemic draws to a close, according to Fleming Shi, Chief Technology Officer at Barracuda Networks. On the CyberWire’s Hacking ...

Office 365 Phishing Kits Are Being Used in a New Attack Targeting Execs and Finance

Apr 2, 2021 10:09:14 AM By Stu Sjouwerman

A new highly-targeted phishing campaign is seeking to compromise the online credentials of those with influence within an organization using an Office 365-themed update attack.

Encryption, Exfiltration, and Extortion are the Name of the Game as PSYA Ransomware Attacks on Education Organizations Increase

Apr 2, 2021 10:09:11 AM By Stu Sjouwerman

A new warning from the FBI highlights an aggressive campaign of ransomware attacks targeting higher education, K-12 schools, and seminaries, providing specific attack details.

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Stu Sjouwerman

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Recent Posts

APT Group Use Voice-Changing Software to Impersonate Women as Part of Espionage Attacks

New Phishing Attacks Bypass Secure Email Gateways Using Some Very Creative Methods

LinkedIn Data of 500 Million Users Hacked, Up For Sale: Report

Phishing Attacks Using PDF Files Have Skyrocketed

The Clop #Ransomware gang is now pressuring customers of victims threatening that their personal, confidential data will be exposed unless a ransom is paid

The Growing WeTransfer Phishing Campaign Can Put Your Users at Risk

[HEADS UP] New Phishing Attack With .TXT Attachment Can Steal All Your Secrets

CyberheistNews Vol 11 #14 [Heads Up] Phishing Remains the Most Common Form of Attack

[Security Culture Report 2021] A Global Security Culture Perspective During a Pandemic

UK Users Should Be Aware of Census-Themed Phishing Attacks

[HEADS UP] Millions of Facebook Users' Personal Information Has Been Leaked Online

Expect More Travel-Related Phishing as the Pandemic Subsides

Office 365 Phishing Kits Are Being Used in a New Attack Targeting Execs and Finance

Encryption, Exfiltration, and Extortion are the Name of the Game as PSYA Ransomware Attacks on Education Organizations Increase

FBI Warns of “Almost Certain” Deepfake Attacks Over the Next 12-18 Months

KnowBe4 Fresh Content Updates from March: Including New Optional Learning Feature for Your Users

Cybercrime Skyrocketed in the US by 55%

IRS Warns of Phishing for Dot EDU Email Users

FBI's Newly Release Internet Crime Report Shows Cybercrime has Ramped Up in 2020

Recent Phishing Scams that Managed to Bypass Email Security Filters

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