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

Kevin Mitnick Selling 0-day Exploits Is A Good Idea

Sep 29, 2014 1:03:00 PM By Stu Sjouwerman

OK, so here is my take on the recent hatchet job by WIRED Magazine.

Home Depot Hack Turns Into Criminal Negligence Scandal

Sep 29, 2014 8:58:00 AM By Stu Sjouwerman

Wait for the class-actions lawsuits to get unleashed. The lawyers are going to be over this one like white on rice. Ex-employees from the Home Depot IT technology group are now claiming ...

CyberheistNews Vol 4, # 38 Home Depot Target Breaches Exploited Old WinXP

Sep 23, 2014 9:23:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 38

New Android Ransomware Strain Locks The Device Twice

Sep 22, 2014 3:07:00 PM By Stu Sjouwerman

Researchers in Russia discovered a new Android ransomware strain which does not lock the device just once but twice. It spreads by using a social engineering trick, disguising itself as a ...

Home Depot, Target Breaches Exploited Old WinXP Flaw

Sep 20, 2014 2:12:00 PM By Stu Sjouwerman

The massive security breaches and theft of credit card information at The Home Depot and Target have something in common. They were both allowed by a vulnerability in XP embedded that was ...

Regular Facebook Users Are More Likely To Fall For Phishing Scams

Sep 19, 2014 3:32:00 PM By Stu Sjouwerman

Techcrunch was the first one to report on some very interesting findings:

New KnowBe4 Whitepaper: A Short History of Ransomware

Sep 18, 2014 5:57:00 PM By Stu Sjouwerman

CyberheistNews Vol 4, # 37 Symantec: Crypto Ransomware Phishing Up 700 Percent in 2014

Sep 16, 2014 10:08:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 37

Home Depot Hit By Same Russian Hackers As Target

Sep 13, 2014 3:29:00 PM By Stu Sjouwerman

Right after the Target Hack, C-level execs at Home Depot Inc. put together a task force to prevent being the victim of a similar attack. The task force recommended to fully encrypt ...

Symantec: Crypto Ransomware Phishing Up 700 Percent in 2014

Sep 12, 2014 5:06:00 PM By Stu Sjouwerman

Very interesting data from Symantec. This is fresh from the press and shows Phishing, Spam and Malware trends. There is a PDF with a whole bunch more data, but these are the most relevant ...

We Are At War In The Digital World

Sep 11, 2014 1:52:00 PM By Stu Sjouwerman

I just read an opinion editorial in the Wall Street Journal that really did clarify the new threat we are faced with this last decade. "Ten years ago, the 9/11 Commission Report triggered ...

Cyber Criminals Use AEA-256 Crypto To Obfuscate Phishing Sites

Sep 10, 2014 10:47:00 AM By Stu Sjouwerman

The Register said: "Well, at least someone listened to Snowden about privacy... Phishing fraudsters have begun using industry-standard AES-256 encryption to disguise the content of ...

CyberheistNews Vol 4, 36 Scam Of The Week: Bitcoin Wallet Theft

Sep 9, 2014 9:35:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 36

Five Reasons Why Clicking "Unsubscribe" May Be A Bad Idea

Sep 8, 2014 9:47:00 AM By Stu Sjouwerman

When you get on a mailing list you don't want to be on, it's easy to get off – just click on the "unsubscribe" link. But should you? Sophos Naked Security says maybe not. When you ...

New Ransomware Discovered Called CryptoGraphic Locker

Sep 4, 2014 3:25:00 PM By Stu Sjouwerman

Panda researcher BartBlaze discovered a new strain of ransomware called CryptoGraphic Locker. Bleepingcomputer wrote: "Just like other encrypting ransomware, this infection will scan your ...

CyberheistNews Vol 4, # 35 Scam Of The Week: Jennifer Lawrence

Sep 4, 2014 1:46:00 PM By Stu Sjouwerman

CyberheistNews Vol 4, # 35

Is The Home Depot Hack Really Russian Retaliation?

Sep 2, 2014 2:30:00 PM By Stu Sjouwerman

Brian Krebs blogged: "Multiple banks say they are seeing evidence that Home Depot stores may be the source of a massive new batch of stolen credit and debit cards that went on sale this ...

Scam Of The Week: Jennifer Lawrence Nude Pictures Phishing

Sep 2, 2014 10:00:00 AM By Stu Sjouwerman

There is a new (true) Current Event which unfortunately is the ultimate click bait. A hacker got into the Apple iCloud and hacked the account of Jennifer Lawrence and many other celebs.

Meet CryptoWall, The New Ransomware Leader (with heatmap)

Aug 29, 2014 5:00:00 PM By Stu Sjouwerman

Malware comes in waves. CryptoLocker was the first major, vicious ransomware, and set off a bunch of copycats. Recently 16 competing ransomware gangs were identified. After CryptoLocker ...

Chase Is Asking For Phishing Trouble

Aug 29, 2014 3:43:00 PM By Stu Sjouwerman

Chase bank says to click links if you suspect phishing. Huh? Yup, they do. Check out this email from Chase, scratch your head, and do not make this error in your own organization. If you ...

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