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

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 ...

J.P. Morgan Hacked Because Malware Infects Employee PC

Aug 28, 2014 9:19:00 AM By Stu Sjouwerman

This morning, the Wall Street Journal reported on the front page that J.P. Morgan was hacked and suffered a cyberheist called "a significant breach of corporate computer security".

Bitcoin Phishing Click Rate Higher Than Regular Scams

Aug 27, 2014 8:41:00 AM By Stu Sjouwerman

The Proofpoint Threatinsight blog reported on something curious. They called their posting "Curiosity Clicks: Using Bitcoin’s hype for phishing fun" and came up with some interesting ...

CyberheistNews Vol 4, # 34 Cryptolocker Being Spread Via YouTube Ads

Aug 26, 2014 9:58:00 AM By Stu Sjouwerman

CyberheistNews Vol 4, # 34

A cybersecurity video you should really watch

Aug 24, 2014 6:19:00 PM By Stu Sjouwerman

Cybersecurity as Realpolitik by Dan Geer at Black Hat USA 2014

900,000 Android Phones Hit by Ransomware in 30 days

Aug 24, 2014 10:37:00 AM By Stu Sjouwerman

August 22, 2014 - Nicole Perlroth at the New York Times wrote: "You are guilty of child porn, child abuse, zoophilia or sending out bulk spam. You are a criminal. The Federal Bureau of ...

Not news: Windows Store is full of scam apps

Aug 22, 2014 1:42:00 PM By Stu Sjouwerman

Paul Thurrott over at WindowsIT Pro wrote:

Workers At U.S. Nuclear Regulator Fooled By Phishing

Aug 21, 2014 11:34:00 AM By Stu Sjouwerman

Antone Gonsalves at CSO reported something that worries me, and this SHOULD NOT BE at this day and age.

Cryptolocker Being Spread On YouTube Ads

Aug 21, 2014 11:12:00 AM By Stu Sjouwerman

VirusBulletin reported that cyber criminals now spread around Cryptolocker / CryptoWall via YouTube. The cyber criminals purchase advertising space and use exploit kits to infect ...

Reveton Ransomware Adds Powerful Password Stealer

Aug 21, 2014 10:39:00 AM By Stu Sjouwerman

The Avast Blog reports a new "password stealer" feature in the Reveton ransomware. Reveton is the type of "police" lock/screen ransomware which falsely alerts users they've broken some ...

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