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

CyberheistNews Vol 5 #28 Scam Of The Week: Internet Capacity Warning

Jul 14, 2015 8:55:55 AM By Stu Sjouwerman

CyberheistNews Vol #5 #28 July 14, 2015 Scam Of The Week: Internet Capacity Warning OK, so here is the latest scam, possibly fueled by the recent news that we have run out of IPv4 ...

U.K.-hedge fund loses a million dollars in social engineering attack

Jul 13, 2015 1:42:06 PM By Stu Sjouwerman

A British hedgefund lost more than a million dollars in a social engineering attack on their Chief Financial Officer Thomas Meston, and there is an expensive court case going on because ...

OPM: 'Victim-as-a-Service' Provider

Jul 12, 2015 12:25:00 PM By Stu Sjouwerman

Unconscionable. I would even say callous and criminal negligence, all on the current administration's watch, of the highly confidential and very private information of the people working ...

Scam Of The Week: Internet Capacity Warning

Jul 12, 2015 10:58:00 AM By Stu Sjouwerman

OK, so here is the latest scam of the week, possibly fueled by the recent news that we have run out of IPv4 addresses in the U.S. Employees receive an email which claims to be from the ...

A New, Innovative Ransomware Attack Spreads Using Google Drive

Jul 10, 2015 8:56:00 AM By Stu Sjouwerman

An Eastern European cybercrime gang has started a new TorrentLocker ransomware campaign where whole websites of energy companies, government organizations and large enterprises are being ...

Spear Phishing Attack Results In $5.3 Million Bitcoin Cyberheist

Jul 9, 2015 2:20:00 PM By Stu Sjouwerman

"Newly leaked, confidential documents have revealed details into a cyberattack aimed at Bitstamp, a company that fundamentally deals as a cryptocurrency trader, according to a report in ...

CyberheistNews Vol 5 #27 Scam Of The Week: Payment By Facebook Friend

Jul 7, 2015 9:16:15 AM By Stu Sjouwerman

CyberheistNews Vol #5 #27 July 7, 2015 Scam Of The Week: Payment By Facebook Friend As of last Tuesday, Facebook has switched on person-to-person (P2P) payments for users in the US to ...

Woman conned out of £50,000 in shrewd spearphishing scam

Jul 5, 2015 12:15:00 PM By Stu Sjouwerman

In a variation of the "CEO Fraud", spearphishing is getting more up close and personal. Read this story and apply the lesson learned in your own life before you lose your life savings. ...

Criminal Hackers Steal Your Database? See You In Court

Jul 3, 2015 1:45:00 PM By Stu Sjouwerman

Jim Flynn wrote: "Helping to demonstrate that every cloud has a silver lining if you look hard enough, hacking has proven to be of great benefit to the legal profession. That's because ...

What KnowBe4 Customers Say About Us July 3, 105

Jul 3, 2015 1:09:38 PM By Stu Sjouwerman

Hi Stu, "We're happy with the product. Getting good feedback from users who've gone through the programme and my management is highly impressed with the quality of the information given. ...

OPM Phishing Attack: "Your Data Was Hacked, How To Protect Yourself"

Jul 3, 2015 10:24:04 AM By Stu Sjouwerman

And yes, as we predicted, there are now phishing attacks that mimic Office of Personnel Management (OPM) data breach notifications. The breach has expanded to millions more records. It ...

Scam Of The Week: Payment By Facebook Friend

Jul 2, 2015 5:37:00 PM By Stu Sjouwerman

As of last Tuesday, Facebook has switched on person-to-person (P2P) payments for users in the US to "instant-message" money to their friends, using the debit cards connected to their bank ...

Confidence In Antivirus Falls To All-time Low

Jul 2, 2015 11:17:00 AM By Stu Sjouwerman

Bromium is a company with a new antivirus mousetrap, so it will try to make old mousetraps look, well... old. However, they do point out correctly that traditional antivirus is starting ...

CyberheistNews Vol 5 #26 FBI Alert: Latest CryptoWall Ransomware Damage More Than $18 Million

Jun 30, 2015 9:16:00 AM By Stu Sjouwerman

CyberheistNews Vol #5 #26 June 30, 2015 FBI Alert: Latest CryptoWall Ransomware Damage More Than $18 Million The latest version 3.0 of CryptoWall, descendant of the infamous CryptoLocker, ...

Patch Flash NOW Or Get Infected With CryptoWall

Jun 29, 2015 12:00:00 PM By Stu Sjouwerman

It is now urgent to patch any Adobe Flash Player machines in your network. Why? There is an exploit kit called Magnitude that now uses a recently patched Flash zero-day vulnerability. An ...

FBI Alert: Latest CryptoWall Ransomware Damage More Than $18 Million

Jun 27, 2015 11:09:00 AM By Stu Sjouwerman

The latest version 3.0 of CryptoWall, descendant of the infamous CryptoLocker, is the most advanced and most damaging ransomware in the wild at the moment, specifically targeting U.S. ...

World's Most Famous Hacker Kevin Mitnick: IoT Is Exploitable

Jun 26, 2015 11:09:00 AM By Stu Sjouwerman

Clad in a blue suit and conservative necktie, KnowBe4's Chief Hacking Officer Kevin Mitnick no longer looks the part of the precocious teen who started hacking into computer systems while ...

CyberheistNews Vol 5 #25 Scam Of The Week: Spoofed CEO Money Transfer Request

Jun 23, 2015 8:52:59 AM By Stu Sjouwerman

CyberheistNews Vol #5 #25 June 23, 2015 Scam Of The Week: Spoofed CEO Money Transfer Request Heads-up, there is a real wave of this scam going on at the moment. I would copy and paste ...

Magazine publisher loses $1.5M in phishing scam

Jun 20, 2015 9:13:00 AM By Stu Sjouwerman

Cyber-criminals have social engineered magazine publisher Bonnier Group out of at least $1.5m after hacking the CEO’s email. The total damage could be as much as $3.0 million. Bonnier ...

Ransomware Resume Phishing Security Test Gets Monster Open Rate

Jun 19, 2015 11:30:00 AM By Stu Sjouwerman

Now here is a real IT Horror Story. A brand new KnowBe4 customer which had not yet trained their employees decided to test their staff with one of the new templates we had just released.

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