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

Yet Another Utility Company Falls Victim to Ransomware Attack

Mar 5, 2020 3:26:40 PM By Stu Sjouwerman

The latest ransomware attack on yet another utility company echos the warnings from last year’s report on utilities’ readiness for a cyberattack.

Stealthy 'Netwalker' Ransomware Using Windows Explorer And 'Art of Deception' To Infect Enterprise Networks

Mar 5, 2020 2:02:10 PM By Stu Sjouwerman

Researchers at Quick Heal Security Labs have discovered a new strain of the “Mailto” ransomware nicknamed “Netwalker" that uses the art of deception to evade detection. The new strain ...

Did you know that KnowBe4 provides Managed Phishing Services?

Mar 5, 2020 9:58:23 AM By Stu Sjouwerman

You have determined the need for a mature, effective security awareness training program to make sure your employees do not fall for phishing emails or social engineering attacks. As part ...

UK Telegraph: "Huge ransomware attack laid bare French lingerie firm"... And Bankrupted It

Mar 5, 2020 9:26:13 AM By Stu Sjouwerman

Leave it to the wordsmiths of the British Press to come up with a catchy title like this... However, the topic is dead serious.

Anti-Virus, Identity Protection Phishbait

Mar 5, 2020 8:29:19 AM By Stu Sjouwerman

A phishing campaign is using fake NortonLifelock documents to trick victims into installing a remote access tool, according to researchers at Palo Alto Networks’ Unit 42. The documents ...

KnowBe4 and Agari Announce New Partnership to Transform Phishing Protection

Mar 5, 2020 8:00:00 AM By Stu Sjouwerman

As market leaders, KnowBe4 and Agari have joined forces to help stop identity-based email attacks. Together, we have created a best-in-class approach to defend against phishing attacks at ...

New Sophisticated Credential-Stealing Malware, Forelord, Attacks the Middle East

Mar 4, 2020 5:15:52 PM By Stu Sjouwerman

This latest APT highlights the levels of sophistication attackers will go to just to establish persistence, infect the endpoint, and steal credentials from the victim organization.

Courts Limit Payout on Insurance Claim to Just One Section of the Liability Policy

Mar 4, 2020 5:14:07 PM By Stu Sjouwerman

The latest ruling shows how the courts are becoming well-versed in the ways of cyberattacks, and are holding both insurers and policyholders to the letter of the contract.

Social Security Administration Warns of Phone Scams On March 5th "Slam The Scam Day"

Mar 4, 2020 3:47:47 PM By Stu Sjouwerman

The Social Security Administration in Association with the Federal Trade Commission's (FTC) National Consumer Protection Week, want to remind everyone that scammers are now targeting ...

[On-Demand] Never Assume Breach: Build a Data-Driven Defense Strategy to Secure Your Organization's Most Valuable Assets

Mar 4, 2020 8:47:52 AM By Stu Sjouwerman

Even the world’s most successful organizations have significant weaknesses in their IT security defenses, which today’s determined hackers can exploit at will. There’s even a term for it: ...

Cut-and-Paste Phishbait

Mar 4, 2020 8:21:52 AM By Stu Sjouwerman

Naked Security describes a phishing campaign that’s convincingly spoofing emails from the online payment company Stripe. The email informs the recipient that an unknown device has logged ...

Data Breach After Effects: Consequences and Learning Lessons

Mar 4, 2020 8:17:07 AM By Stu Sjouwerman

If you think your organization is safe from a data breach, think again. Data breaches could be deadly for any organization big or small.

CyberheistNews Vol 10 #10 [HEADS-UP] Famous 'Shark' Got Hooked and Lost 400K in an Embarrassing Email Phishing Scam

Mar 3, 2020 9:15:52 AM By Stu Sjouwerman

New Sophisticated “Exaggerated Lion” BEC Check Scam Uses Mules to Cash Out

Mar 3, 2020 8:36:45 AM By Stu Sjouwerman

You may wonder exactly how BEC scammers see a payday. New insight from security vendor Agari documents how a secondary check scam dupes unsuspecting victims to help.

Racoon: Infostealer Malware Collects Credentials, Financial and Personal Information

Mar 3, 2020 8:32:40 AM By Stu Sjouwerman

Access to a compromised endpoint may no longer be enough. So, enterprising malware authors offer up infostealers to help exfiltrate valuable data from an infected machine.

None But the Lonely Heart Would Fall for an Emoji

Mar 3, 2020 8:24:20 AM By Stu Sjouwerman

Researchers at Malwarebytes and X-Force IRIS have come across an ongoing phishing campaign that’s using romance-themed emails to distribute the Nemty ransomware, BleepingComputer reports. ...

Experts: Expect Summer Olympics-Themed Cyberattacks in the Coming Months

Mar 2, 2020 4:41:34 PM By Stu Sjouwerman

The business of the games will provide cybercriminals with countless options to scam participants, sponsors, and spectators using contextual details and social engineering.

Ransomware Attack On Wool Industry Halted Sales Across Australia Last Week

Mar 2, 2020 11:27:49 AM By Stu Sjouwerman

It is yet to be seen how a cyber attack which shut down wool sales last week will affect growers in Tasmania. Last Tuesday Talman Software, which is used by the majority of wool industry ...

Bogus Singapore Police Site Serves as a Watering Hole

Mar 2, 2020 11:09:01 AM By Stu Sjouwerman

The Singapore Police Force (SPF) released an advisory warning about a phishing site that’s spoofing the Force’s website, Channel News Asia reports. The bogus website informs the user that ...

Nigerian Man Arrested 3 Years After $850,000 Stolen in Email Scam

Feb 28, 2020 9:32:41 AM By Stu Sjouwerman

The Boulder County Sheriff’s Office says a Nigerian man has been arrested more than three years after $850,000 was stolen in construction bond money from the Boulder Valley School ...

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