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

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Scary new malware hides in memory, uses DNS to communicate, and spreads through phishing

Mar 6, 2017 1:26:26 PM By Stu Sjouwerman

Cisco has a separate threat research group called Talos. They just published a report on a scary new form of malware that’s hard to detect. They called it DNSMessenger, and the malicous ...

Verizon: "Most Breaches Trace to Phishing, Social Engineering"

Mar 6, 2017 9:57:55 AM By Stu Sjouwerman

BankInfoSecurity wrote: "Ninety percent of data breaches seen by Verizon's data breach investigation team have a phishing or social engineering component to them. Not coincidentally, one ...

CyberheistNews Vol 7 #10 [ALERT] New Massive Wave of CryptoLocker Ransomware Infections

Mar 6, 2017 9:54:49 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

Scam Of The Week: Mystery Shopper Email

Mar 5, 2017 11:55:50 AM By Stu Sjouwerman

Steven Weisman, Esq. warned against this scam and wrote March 5th: "Mystery shoppers are people hired to shop at a particular store and report on the shopping experience for purposes of ...

[ALERT] New Massive Wave Of CryptoLocker Ransomware Infections

Mar 5, 2017 10:56:09 AM By Stu Sjouwerman

We all thought that evil genius Evgeniy Bogachev had retired at the Black Sea with his tens of millions of ill-gotten gains after he became the FBI's #1 Most Wanted cybercriminal. Well, ...

KnowBe4 Moves From #139 to #38 On Cybersecurity 500

Mar 2, 2017 8:00:16 AM By Stu Sjouwerman

The Cybersecurity 500 / Q1 2017 list of the world's hottest security companies was officially released yesterday, Mar. 1. In their "Movers and Shakers" section they stated: "KnowBe4 is a ...

Ransomware for Dummies: Anyone Can Do It

Mar 2, 2017 7:41:00 AM By Stu Sjouwerman

Brian Krebs just wrote: "A big reason for the steep increase in ransomware attacks in recent years comes from the proliferation of point-and-click tools sold in the cybercrime underground ...

VISA warns for Flokibot Spear Phishing Infections

Mar 1, 2017 2:31:10 PM By Stu Sjouwerman

VISA warned all its merchants that multiple infosec firms reported on the emerging threat of a new malware variant identified as “Flokibot.”

Report: 85% of Ransomware Victims Get Taken Offline For A Week or More [INFOGRAPHIC]

Feb 28, 2017 11:25:28 AM By Stu Sjouwerman

New research reveals that the majority of ransomware victims (85 percent) had their systems taken offline for at least a week, costing businesses thousands in financial damage each day.

2016 Exceeds All Records in Numbers of Phishing Attacks

Feb 28, 2017 10:14:06 AM By Stu Sjouwerman

Year over year sustained growth in phishing campaigns produces yet another record number of attacks The Anti-Phishing Working Group (APWG) observed that 2016 ended as the worst year for ...

CyberheistNews Vol 7 #9 Survey: Most Hackers Break in Within Six Hours

Feb 28, 2017 9:45:51 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

MySQL instances attacked by database blackmailers

Feb 26, 2017 2:32:42 PM By Stu Sjouwerman

Copycats delete databases without dumping them first. Internet-facing instances of the popular MySQL information store are being targeted by attackers following similar attacks on ...

Which User Will Infect Your Network With Ransomware?

Feb 26, 2017 1:56:48 PM By Stu Sjouwerman

We've got something really cool for you: the new Phishing Security Test v2.0! It's got several great new features, and sending simulated phishing emails to train your employees is a fun ...

Phishing Attack Uses Stuxnet Technology And Makes PCs Into Roombugs

Feb 26, 2017 9:43:16 AM By Stu Sjouwerman

Researchers have uncovered an advanced malware-based operation that siphoned more than 600 gigabytes from about 70 targets in a broad range of industries, including news media, and ...

Survey: Most Hackers Break In Within Six Hours

Feb 25, 2017 10:09:05 AM By Stu Sjouwerman

A recent survey of 70 professional hackers and penetration testers found that 60% of them take a maximum of just six hours to compromise a target. The research titled The Black Report, ...

CyberheistNews Vol 7 #8 Google: "Office Inbox Receives 6.2X More Phishing Than Your Inbox at Home".

Feb 21, 2017 9:46:36 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

I just learned how to hoverboard... LOL

Feb 20, 2017 12:56:02 PM By Stu Sjouwerman

[On-Demand Webinar] Forrester TEI™: Value of KnowBe4 Goes Beyond ROI

Feb 20, 2017 11:35:41 AM By Stu Sjouwerman

KnowBe4 recently commissioned Forrester to conduct a Total Economic Impact™ (TEI) study, examining the potential Return on Investment (ROI) enterprises might realize by implementing the ...

Hackers Demand $25K-$30K After Ransomware Attack Takes Down Bingham County Servers

Feb 20, 2017 7:08:39 AM By Stu Sjouwerman

BLACKFOOT — Bingham County officials are scrambling to rebuild parts of their computer infrastructure after a ransomware attack took down county servers on Wednesday. The Bingham County ...

7 Urgent Reasons For Creating A Human Firewall

Feb 19, 2017 9:45:47 AM By Stu Sjouwerman

I was at RSA 2017 in San Francisco last week, and apart from meetings with customers, VCs and the Press, I found a large amount of relevant security news. Out of the firehose of RSA data, ...

Security Awareness Training Blog

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Stu Sjouwerman

Books

Recent Posts

Scary new malware hides in memory, uses DNS to communicate, and spreads through phishing

Verizon: "Most Breaches Trace to Phishing, Social Engineering"

CyberheistNews Vol 7 #10 [ALERT] New Massive Wave of CryptoLocker Ransomware Infections

Scam Of The Week: Mystery Shopper Email

[ALERT] New Massive Wave Of CryptoLocker Ransomware Infections

KnowBe4 Moves From #139 to #38 On Cybersecurity 500

Ransomware for Dummies: Anyone Can Do It

VISA warns for Flokibot Spear Phishing Infections

Report: 85% of Ransomware Victims Get Taken Offline For A Week or More [INFOGRAPHIC]

2016 Exceeds All Records in Numbers of Phishing Attacks

CyberheistNews Vol 7 #9 Survey: Most Hackers Break in Within Six Hours

MySQL instances attacked by database blackmailers

Which User Will Infect Your Network With Ransomware?

Phishing Attack Uses Stuxnet Technology And Makes PCs Into Roombugs

Survey: Most Hackers Break In Within Six Hours

CyberheistNews Vol 7 #8 Google: "Office Inbox Receives 6.2X More Phishing Than Your Inbox at Home".

I just learned how to hoverboard... LOL

[On-Demand Webinar] Forrester TEI™: Value of KnowBe4 Goes Beyond ROI

Hackers Demand $25K-$30K After Ransomware Attack Takes Down Bingham County Servers

7 Urgent Reasons For Creating A Human Firewall

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