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

Game Phishing Scams Steal Steam Accounts

Aug 20, 2019 4:56:43 PM By Stu Sjouwerman

A phishing scam is stealing Steam accounts by promising free games to victims if they log in to a website with their Steam credentials, according to a recent post by BleepingComputer.

KnowBe4 Applauds Proposed Legislation for Cybersecurity Training Requirement for U.S. House Members

Aug 20, 2019 4:48:48 PM By Stu Sjouwerman

On May 10, 2019, U.S. Representative Kathleen Rice (D-NY) introduced legislation that will require House Members to partake in annual cybersecurity training. At this time, elected ...

[On-Demand Webinar] How to Prevent 81% of Phishing Attacks With DMARC

Aug 20, 2019 3:12:58 PM By Stu Sjouwerman

Only ~20% of companies use DMARC, SPF, and DKIM, global anti-domain-spoofing standards, which could significantly cut down on phishing attacks. But even when they are enabled and your ...

CyberheistNews Vol 9 #34 [Heads Up] The Unusual Activity Would Be the Microsoft Warning Itself

Aug 20, 2019 10:11:27 AM By Stu Sjouwerman

Blank Emails Come Before BEC Fraud Attack

Aug 19, 2019 4:59:03 PM By Stu Sjouwerman

Business email compromise (or CEO fraud) has its reconnaissance phase, too. Researchers at Agari say they’ve found that blank, unsolicited emails are often an early sign that a BEC gang ...

The Wall Street Journal Just Published An Interview with Kevin Mitnick, KnowBe4's Chief Hacking Officer

Aug 17, 2019 7:46:14 AM By Stu Sjouwerman

August 16, 2019 - Randy Maniloff wrote about Kevin in the WSJ "Weekend Interview". It's a great article that covers his start as a teenage hacker, how he wound up in jail, and how he ...

Are Local Government and Municipalities Part of a Coordinated Attack on the U.S.?

Aug 15, 2019 3:17:12 PM By Stu Sjouwerman

There are too many ransomware attacks to ignore the similarities. It’s either government networks are easy prey, or someone is trying to cash out on the U.S., one attack at a time.

Social Engineering Testing is Necessary to Fend off Phishing Attacks

Aug 15, 2019 3:14:23 PM By Stu Sjouwerman

The success of social engineering as part of phishing and spear phishing attacks has caused organizations to realize they need an effective tactic to make employees vigilant.

The Unusual Activity Would be the Warning Itself

Aug 15, 2019 7:01:40 AM By Stu Sjouwerman

BleepingComputer has come across a phishing campaign that’s spoofing “Unusual sign-in” warnings from Microsoft to steal users’ credentials. The emails look nearly identical to Microsoft’s ...

Even when your users don't click...

Aug 14, 2019 10:40:34 AM By Stu Sjouwerman

...they can still be helping the bad guys compromise your organization. Sad but true.

Report: Data Breach in Biometric Security Platform Affecting Millions of Users

Aug 14, 2019 7:22:48 AM By Stu Sjouwerman

Led by internet privacy researchers Noam Rotem and Ran Locar, vpnMentor’s team recently discovered a huge data breach in biometrics security platform BioStar 2. Once stolen, fingerprint ...

BYOD Really Means Bring Your Own Risk

Aug 14, 2019 7:04:03 AM By Stu Sjouwerman

A new survey by Nationwide Insurance found that while 83 percent of small businesses let their employees work from home when necessary, one-fifth of these companies don’t provide ...

Still Dodging that Sextortion Bullet

Aug 13, 2019 5:27:18 PM By Stu Sjouwerman

It has long been true that sextortionists really had nothing on their intended victims. No video, no screen captures, nothing at all beyond shame and an uneasy conscience. Unfortunately ...

Security warning for software developers: You are now prime targets for phishing attacks

Aug 13, 2019 11:25:00 AM By Stu Sjouwerman

Danny Palmer at ZDNet wrote: "Software developers are the people most targeted by hackers conducting cyberattacks against the technology industry, with the hackers taking advantage of the ...

CyberheistNews Vol 9 #33 Bad Guys Exploit CapitalOne Breach to Push Backdoor Trojan

Aug 13, 2019 10:04:28 AM By Stu Sjouwerman

Scam Of The Week: See Jeffrey Epstein Last Words On Video

Aug 12, 2019 8:47:51 AM By Stu Sjouwerman

This weekend, news broke that Jeffrey Epstein was found dead in his cell, apparently a suicide. This is a celebrity death that the bad guys are going to be exploiting in a variety of ways ...

3 Important Facts to Take Away From the New Data Security Law

Aug 12, 2019 6:59:37 AM By Stu Sjouwerman

By Lecio De Paula, Jr., Director of Data Privacy, KnowBe4. New Hampshire joins Ohio, South Carolina, and Michigan in enacting a new data security law directed at insurers modeled after ...

Three Lessons from a Recent MegaCortex Ransomware Phishing Attack

Aug 12, 2019 6:55:16 AM By Stu Sjouwerman

The MegaCortex strain of ransomware has been used in criminal campaigns targeting businesses as opposed to private individuals. The QuickBooks cloud-hosting firm iNSYNQ, has sustained ...

Varieties of Extortion Experience

Aug 10, 2019 11:26:07 AM By Stu Sjouwerman

We are all familiar with ransomware and its increasingly dangerous cousin, wiper malware. The first encrypts your files and demands ransom payments in exchange for the decryption key. The ...

Here Are Some Interesting Headlines I Found During Black Hat

Aug 10, 2019 10:45:01 AM By Stu Sjouwerman

Black Hat 2019 - The Craziest, Most Terrifying Things We Saw: I ran into Neil Rubenking when I went to the Qualys party which was in the Foundation Room all the way on top of the ...

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