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

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Monkeying Around for Office 365 Credentials

Jul 13, 2020 10:40:38 AM By Stu Sjouwerman

Criminals are abusing SurveyMonkey to host redirect links to an Office 365 phishing page, researchers at Abnormal Security have found. The emails contain links to a real SurveyMonkey ...

6000% Increase in Phishing Attacks Leveraging COVID-19, Healthcare Industry Often The Target

Jul 13, 2020 10:12:40 AM By Stu Sjouwerman

On July 3rd just before the holiday weekend, Mount Auburn Hospital's IT team identified suspicious activity. Alarmed, they quickly took steps to disconnect the Cambridge hospital's ...

Ragnar Locker Ransomware Attacks Energy Company, Potentially Stealing 10TB in Data

Jul 13, 2020 7:03:00 AM By Stu Sjouwerman

In a letter to customers, EDP Renewables North America CEO acknowledges the attack occurred back in April of this year, but claims “no evidence” of data theft exists.

Thanos Ransomware Attacks Now Disable Backups, Avoid Detection, and Impersonate the OS

Jul 13, 2020 7:02:00 AM By Stu Sjouwerman

Recent updates to the well-known Ransomware-as-a-Service – including the addition of RIPlace – make Thanos a formidable challenge for even well-secured organizations.

Vishing Attacks Yield Phone Fraud Take of Over $100 Million

Jul 13, 2020 7:01:00 AM By Stu Sjouwerman

While not a new tactic, vishing presents cybercriminals with an attack method that’s perfectly aligned with the pandemic shifts to remote workforces.

Ransomware Attacks on Manufacturing Yield an Average Payout of $271K

Jul 13, 2020 7:00:00 AM By Stu Sjouwerman

New data shows just how much major industries are paying out to remediate successful ransomware attacks, despite guidance to never pay the ransom.

[HEADS UP] Office 365 Phishing Attacks Now Use Fake Zoom Suspension Alerts

Jul 9, 2020 1:33:56 PM By Stu Sjouwerman

Microsoft Office 365 users are targeted by a new phishing campaign using fake Zoom notifications to warn those who work in corporate environments that their Zoom accounts have been ...

Back-to-School: a Buzzkill in More Ways than One

Jul 9, 2020 9:01:39 AM By Stu Sjouwerman

40% of the top twenty universities in the US aren’t using DMARC to mitigate phishing attacks that impersonate the universities’ domains, according to researchers at Tessian. Additionally, ...

[On-Demand Webinar] Hackers Exposed: Kevin Mitnick Shares His Tradecraft and Tools to Help You Hack Proof Your Network

Jul 9, 2020 8:27:47 AM By Stu Sjouwerman

Months of quarantine, transitioning to work from home, economic uncertainty, social and political turmoil… it’s easy to see why your employees are amped up, tense and distracted. And the ...

More Than 15 Billion Credentials Are For Sale in Criminal Markets

Jul 8, 2020 3:50:09 PM By Stu Sjouwerman

Researchers at Digital Shadows warn that there are more than 15 billion leaked login credentials for sale in online criminal marketplaces. This number is up 300% since 2018, and the ...

How To Get And Stay Compliant With The New California Consumer Privacy Act (CCPA):

Jul 8, 2020 11:27:36 AM By Stu Sjouwerman

California's new AB 375 privacy law is not as bad as GDPR, but the details are still in flux. CCPA does not have some of GDPR's most scary requirements like the very short 72-hour window ...

Gartner: You Should Focus On These 7 Specific COVID-19 IT Security Areas

Jul 8, 2020 10:59:44 AM By Stu Sjouwerman

Gartner observed: "Rapid responses to the coronavirus pandemic leave organizations vulnerable to security breaches. Security and risk teams must remain vigilant and focus on strategic ...

Microsoft Seizes Six Domains Used in Sophisticated Phishing Scheme

Jul 8, 2020 8:24:34 AM By Stu Sjouwerman

Microsoft announced that the US District Court for the Eastern District of Virginia has ruled that the company can seize six domains that were being used in a widespread phishing ...

CyberheistNews Vol 10 #28 60% of Organizations Are Hit by Cyberattacks Spread by Their Own Employees

Jul 7, 2020 10:49:38 AM By Stu Sjouwerman

[Heads Up] The First-Ever Russian BEC Gang, Cosmic Lynx, Was Uncovered. They Spear Phish Multinational & Fortune 500 Senior Executives

Jul 7, 2020 10:13:48 AM By Stu Sjouwerman

“This is a historic shift to the global email threat landscape and portends new and sophisticated social engineering attacks that CISOs around the world must brace for now,” according to ...

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Stu Sjouwerman

Books

Recent Posts

Monkeying Around for Office 365 Credentials

6000% Increase in Phishing Attacks Leveraging COVID-19, Healthcare Industry Often The Target

Ragnar Locker Ransomware Attacks Energy Company, Potentially Stealing 10TB in Data

Thanos Ransomware Attacks Now Disable Backups, Avoid Detection, and Impersonate the OS

Vishing Attacks Yield Phone Fraud Take of Over $100 Million

Ransomware Attacks on Manufacturing Yield an Average Payout of $271K

[HEADS UP] Office 365 Phishing Attacks Now Use Fake Zoom Suspension Alerts

Back-to-School: a Buzzkill in More Ways than One

[On-Demand Webinar] Hackers Exposed: Kevin Mitnick Shares His Tradecraft and Tools to Help You Hack Proof Your Network

More Than 15 Billion Credentials Are For Sale in Criminal Markets

How To Get And Stay Compliant With The New California Consumer Privacy Act (CCPA):

Gartner: You Should Focus On These 7 Specific COVID-19 IT Security Areas

Microsoft Seizes Six Domains Used in Sophisticated Phishing Scheme

CyberheistNews Vol 10 #28 60% of Organizations Are Hit by Cyberattacks Spread by Their Own Employees

[Heads Up] The First-Ever Russian BEC Gang, Cosmic Lynx, Was Uncovered. They Spear Phish Multinational & Fortune 500 Senior Executives

FakeSpy Android Malware Distributed via Smishing

New Calendar Invitations as Phishbait Attack Wave

New Phishing Attack Targets 200M+ Microsoft 365 Accounts Via Malicious Excel .SLK Files to Bypass Security

More Companies Start Reporting Their Ransomware Infections As The Expensive Data Breaches They Are

KnowBe4’s Q2 2020 Year-Over-Year Sales Grow 25%

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