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

[Heads-Up] Scam Of The Week: Thousands Of Hacked Disney+ Accounts Are Already For Sale On Criminal Sites

Nov 18, 2019 7:00:00 AM By Stu Sjouwerman

Apart from me, guess who has been anticipating the Disney+ channel?

Get Your Hands On KnowBe4's Important 2020 Security Threats and Trends Survey Results First

Nov 18, 2019 7:00:00 AM By Stu Sjouwerman

Once a year, KnowBe4 runs its Security Threats and Trends Survey. We’re polling IT and Security executives, administrators and professionals like yourself on what technology and business ...

A Majority of Organizations Experience Breaches Despite a Majority Saying They Are Prepared to Defend Against Them

Nov 18, 2019 7:00:00 AM By Stu Sjouwerman

The mismatch of signals by IT organizations shows a potential overestimation on IT’s part about its ability to prevent and protect against new cyberthreats.

IT Budgets Are on the Rise in Part Due to Organizational Concerns for Security

Nov 18, 2019 7:00:00 AM By Stu Sjouwerman

Security remains a primary driver as organizations work to establish budgets that keep IT cutting edge, competitive, and secure, according to new data from Spiceworks.

Interested in cybersecurity law and policy?

Nov 16, 2019 12:03:23 PM By Stu Sjouwerman

Check out “Caveat,” the CyberWire's newest weekly podcast addressing cybersecurity law and policy, with a particular focus on surveillance and digital privacy. This podcast is hosted by ...

Half of M&A Cyber Audits Uncover Undisclosed Breaches That Derail Deals

Nov 15, 2019 7:30:00 AM By Stu Sjouwerman

Cybersecurity diligence performed prior to a merger or acquisition often uncovers weaknesses in an organization’s security stance, which can spell doom for the company being purchased and ...

SIM Card Attack May Affect Over 1 Billion Mobile Phones Worldwide

Nov 15, 2019 7:00:00 AM By Stu Sjouwerman

Using SMS messaging, attackers can use phishing tactics to hijack mobile devices using a legacy piece of SIM code, called the S@T Browser, to execute commands as part of a more ...

PayPal Becomes the Most Popular Phishbait

Nov 14, 2019 9:49:16 AM By Stu Sjouwerman

Vade Secure has found that PayPal is now the most impersonated brand in phishing attacks, surpassing Microsoft for the first time, Help Net Security reports. Vade detected 16,547 unique ...

Your CEO's Email May Be Hacked And You Don't Even Know It

Nov 14, 2019 7:00:00 AM By Stu Sjouwerman

Hackers focused on CEO fraud (or Business Email Compromise - BEC) attacks often go to great lengths to hide the fact they have access to your CEO’s mailbox as part of a larger scam.

Instagram Copyright Infringement is the Latest Phishing Scam Targeting Social Media

Nov 14, 2019 7:00:00 AM By Stu Sjouwerman

Focused on compromising social media credentials, scammers trick Instagram users into giving up credentials and other personally identifiable information with convincing phishing emails.

Reuters: "Hackers hit UK political parties with back-to-back cyberattacks"

Nov 13, 2019 7:00:00 AM By Stu Sjouwerman

LONDON (Reuters) - Hackers hit Britain’s two main political parties with back-to-back cyberattacks on Tuesday, sources told Reuters, attempting to force political websites offline with a ...

Mexican Oil Company Pemex Dodges $5M Ransomware Bullet

Nov 13, 2019 7:00:00 AM By Stu Sjouwerman

Mexican state-owned oil company Petróleos Mexicanos (Pemex) on Sunday suffered a ransomware attack that took down parts of its network.

[Heads Up] This New, Unusual Ransomware Strain Goes Exclusively After Servers

Nov 12, 2019 11:52:31 AM By Stu Sjouwerman

Danny Palmer at ZDnet alerted on the following: "An unconventional form of ransomware is being deployed in targeted attacks against enterprise servers – and it appears to have links to ...

CyberheistNews Vol 9 #46 [Heads-Up] Malicious Actors Want to Join Your Team!

Nov 12, 2019 10:01:12 AM By Stu Sjouwerman

Third Party Phishing: The New Spear-Phishing Attacks That Traditional Defenses Just Don't Stop

Nov 12, 2019 8:00:00 AM By Stu Sjouwerman

Joe in accounting is pretty cyber-savvy. He doesn’t fall for basic phishing emails with masked URLs or phony password reset requests. But what happens when Joe gets an email from a ...

TrickBot Malware Uses Highly Personalized Fake Sexual Harassment Complaints as Phishing Bait

Nov 12, 2019 7:00:00 AM By Stu Sjouwerman

Fake sexual harassment complaints appearing to come from the U.S. Equal Employment Opportunity Commission (EEOC) are the latest baits used by attackers to disseminate TrickBot banking ...

People Need to Work Together to Spot Con Artists

Nov 12, 2019 6:53:06 AM By Stu Sjouwerman

It might not be possible to resist a good con artist, according to award-winning author, journalist, and champion poker player Maria Konnikova. On the CyberWire’s Hacking Humans podcast, ...

Phishing Resistance for Charities

Nov 11, 2019 2:19:55 PM By Stu Sjouwerman

81% of charities say they’ve been targeted by a phishing attack this year, according to Ed Macnair, writing for UK Fundraising. Meanwhile, only 37% of charities think their IT and ...

Mac users warned that disabling all Office macros doesn’t actually disable all Office macros

Nov 11, 2019 9:57:58 AM By Stu Sjouwerman

Graham Cluley warned: "It’s been almost 25 years since macro malware first reared its head, and it would be nice to think that the defences Microsoft has built into its Office suite in ...

New articles and updates from the KnowBe4 Technical Content Team

Nov 9, 2019 9:36:51 AM By Stu Sjouwerman

Here are all of the major items and updates our Technical Content Engineers have added to our knowledge base and KMSAT product in the last couple of months.

Security Awareness Training Blog

View Topics

Stu Sjouwerman

Books

Recent Posts

[Heads-Up] Scam Of The Week: Thousands Of Hacked Disney+ Accounts Are Already For Sale On Criminal Sites

Get Your Hands On KnowBe4's Important 2020 Security Threats and Trends Survey Results First

A Majority of Organizations Experience Breaches Despite a Majority Saying They Are Prepared to Defend Against Them

IT Budgets Are on the Rise in Part Due to Organizational Concerns for Security

Interested in cybersecurity law and policy?

Half of M&A Cyber Audits Uncover Undisclosed Breaches That Derail Deals

SIM Card Attack May Affect Over 1 Billion Mobile Phones Worldwide

PayPal Becomes the Most Popular Phishbait

Your CEO's Email May Be Hacked And You Don't Even Know It

Instagram Copyright Infringement is the Latest Phishing Scam Targeting Social Media

Reuters: "Hackers hit UK political parties with back-to-back cyberattacks"

Mexican Oil Company Pemex Dodges $5M Ransomware Bullet

[Heads Up] This New, Unusual Ransomware Strain Goes Exclusively After Servers

CyberheistNews Vol 9 #46 [Heads-Up] Malicious Actors Want to Join Your Team!

Third Party Phishing: The New Spear-Phishing Attacks That Traditional Defenses Just Don't Stop

TrickBot Malware Uses Highly Personalized Fake Sexual Harassment Complaints as Phishing Bait

People Need to Work Together to Spot Con Artists

Phishing Resistance for Charities

Mac users warned that disabling all Office macros doesn’t actually disable all Office macros

New articles and updates from the KnowBe4 Technical Content Team

Search Our Blog

Subscribe To Our Blog

Posts By Topic

Get the latest about social engineering

Subscribe to CyberheistNews

Get the latest about social engineering

Subscribe to CyberheistNews