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

Bitdefender Releases Cryptowall 4.0 Ransomware Vaccine

Nov 11, 2015 3:10:08 PM By Stu Sjouwerman

Right after a new, badder version 4.0 of CryptoWall came out, Romanian security company Bitdefender has released a vaccine they claim will block ransomware infections. Andra Zaharia of ...

CyberheistNews Vol #5 #48 New Triple Threat Chimera: Ransomware, Extortion And Data Breach

Nov 10, 2015 8:12:43 AM By Stu Sjouwerman

OK, Heads Up! This has not hit U.S. shores yet, but it's just a matter of time. This nasty bit of crimeware is being beta-tested in Germany at the moment, and that is where the reports ...

FFIEC warns of increased ransomware attacks

Nov 9, 2015 10:35:38 AM By Stu Sjouwerman

Ransomware continues to be a source of worry and now U.S. regulatory agencies are getting in the fray. The Federal Financial Institutions Examination Council (FFIEC) published a statement ...

New Triple Threat Chimera: Ransomware, Extortion And Data Breach

Nov 7, 2015 10:33:57 AM By Stu Sjouwerman

OK, Heads Up! This has not hit U.S. shores yet, but it's just a matter of time. This nasty bit of crimeware is being beta-tested in Germany at the moment, and that is where the reports ...

CryptoWall v4.0 released: Now encrypts the file names as well

Nov 4, 2015 1:52:47 PM By Stu Sjouwerman

Lawrence Abrams from the famous bleepingcomputer site wrote at Spiceworks: "CryptoWall 4.0 has been released that displays a redesigned ransom note, new filenames, and now encrypts a ...

CyberheistNews Vol #5 #47 CryptoWall Damage 325 Million - FBI says: "Just Pay the Ransom"

Nov 3, 2015 9:50:51 AM By Stu Sjouwerman

A brand new report from the Cyber Threat Alliance (CTA) showed the staggering damage caused by a single Eastern European cyber mafia. The CTA is an industry group with big-name members ...

KnowBe4 Halloween 2015

Oct 30, 2015 4:27:28 PM By Stu Sjouwerman

We had a great time this year, but we had to keep it short because it was the last day of the month and things were super busy! We did have some time for our yearly parade to the local ...

Staggering CryptoWall Ransomware Damage: 325 Million Dollar

Oct 30, 2015 1:52:48 PM By Stu Sjouwerman

A brand new report from Cyber Threat Alliance showed the staggering damage caused by a single criminal Eastern European cyber mafia. The CTA is an industry group with big-name members ...

CyberheistNews Vol 5 #46 Beautiful Social Engineering Attack By Gorgeous IBM Rep

Oct 27, 2015 8:26:04 AM By Stu Sjouwerman

Big-time computer hackers are after proprietary information: source code, pharmaceutical research, legal documents, chemical formulas, blueprints, product designs and other trade secrets ...

FBI’s Advice on Ransomware? Just Pay The Ransom.

Oct 26, 2015 9:54:57 AM By Stu Sjouwerman

In-brief: The nation’s top law enforcement agency is warning companies that they may not be able to get their data back from cyber criminals who use Cryptolocker, Cryptowall and other ...

TalkTalk Hackers Demanded $122K in Bitcoin

Oct 24, 2015 10:50:54 AM By Stu Sjouwerman

TalkTalk, a British phone and broadband provider with more than four million customers, disclosed Friday that intruders had hacked its Web site and may have stolen personal and financial ...

Scam Of The Week: Enter To Win Tickets To Star Wars

Oct 22, 2015 4:14:43 PM By Stu Sjouwerman

It's "Scam Of The Week" time to warn your users against phishing attacks that try to trick them into winning movie tickets for the new Star Wars movie. For the next 2 months this is going ...

Beautiful Social Engineering Attack By Gorgeous IBM Rep

Oct 22, 2015 11:54:49 AM By Stu Sjouwerman

Credit card numbers are small potatoes. Big-time computer hackers are after proprietary information: source code, pharmaceutical research, legal documents, chemical formulas, blueprints, ...

Ransomware Spreads Using Remote Desktop and Terminal Services Attacks

Oct 22, 2015 11:05:07 AM By Stu Sjouwerman

Larry Abrams at tech blog Bleeping Computer was the first one to report on this new wrinkle. The ransomware is called LowLevel04 and encrypts data using RSA-2048 encryption, the ransom is ...

CyberheistNews Vol #5 #45

Oct 20, 2015 9:36:46 AM By Stu Sjouwerman

CyberheistNews Vol #5 #45 Oct 20, 2015 Apple's OS X Security Honeymoon Is Over Unfortunately, bad guys are business people too. Their time is money, and they follow market leaders. By ...

Stop End-Users From Doing Stupid Stuff

Oct 17, 2015 11:01:16 AM By Stu Sjouwerman

Roger A. Grimes is an InfoWorld contributing editor. Roger holds more than 40 computer certifications and has authored eight books on computer security. He has been fighting malware and ...

[VIDEO] Hacking the Chip & Pin card technology is easy

Oct 16, 2015 10:07:54 AM By Stu Sjouwerman

The banks are promoting that the so called new "Chip & Pin" cards are much safer. They are also called the EMV chip system and touted to be secure. However, this technology is 15 ...

Apple's OS X Security Honeymoon Is Over

Oct 15, 2015 11:32:20 AM By Stu Sjouwerman

Unfortunately, bad guys are business people too. Their time is money, and they follow market leaders. By now, Apple's market share of desktop computers is close to 17 percent. OS X, ...

Healthcare pros do not get enough security awareness training

Oct 13, 2015 5:09:33 PM By Stu Sjouwerman

Healthcare pros surprisingly get very little security awareness training. Only 38 percent of these employees get security training at least twice a year -- 49 percent get training once a ...

CyberheistNews Vol 5 #43 Near-flawless Social Engineering Attack Spoiled By Single Error

Oct 13, 2015 8:33:45 AM By Stu Sjouwerman

*|CyberHeistNews|* CyberheistNews Vol #5 #43 Oct 13, 2015 Near-flawless Social Engineering Attack Spoiled By Single Error Steve Ragan at CSO has a great story about a CEO Fraud social ...

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