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

Mobile Devices Rise as a Top Attack Vector for Cybercriminals; Malware and Phishing Remain Primary Concerns

Apr 1, 2019 6:04:54 AM By Stu Sjouwerman

Cybercriminals are using every means available to reach their victims. According to Verizon’s latest data, attacks on mobile devices are increasing while security efforts fall behind.

90% of large tech companies vulnerable to email spoofing

Mar 29, 2019 11:28:37 AM By Stu Sjouwerman

Most companies have not implemented standards for authenticating emails and preventing hackers from successful phishing attacks, according to Valimail.

Which Employees are the Cyber Criminals After?

Mar 28, 2019 10:30:33 AM By Stu Sjouwerman

Lower-level employees are the workers most likely to face highly-targeted attacks, according to the online marketing firm Reboot. Citing information from Proofpoint’s most recent ...

Microsoft Takes Control Of 99 Phishing Domains Operated By Iranian State Hackers

Mar 27, 2019 3:36:49 PM By Stu Sjouwerman

The domains had been used as part of spear-phishing campaigns aimed at users in the US and across the world. Court documents unsealed today revealed that Microsoft has been waging a ...

NotPetya act of war exclusion spreads to second insurer

Mar 27, 2019 11:36:26 AM By Stu Sjouwerman

A second insurer has refused to pay out over the NotPetya cyberattack based on an act of war exclusion, prompting growing concerns for businesses relying on cybersecurity insurance to ...

Cybercriminals Double-Down on What Works, Nearly Doubling the Number of Phishing Attacks in 2018

Mar 27, 2019 10:49:47 AM By Stu Sjouwerman

Using a combination of old and new tactics and distribution channels, cybercriminals continue to seek to compromise endpoints and obtain online credentials. The targets haven’t changed. ...

[New Comedy Series] KnowBe4's Popcorn Training Releases 8-Episode Security Awareness Videos - 'Standups 4 Security'

Mar 27, 2019 8:29:51 AM By Stu Sjouwerman

We’re excited to announce the release of this new security awareness video series for our customers called ‘Standups 4 Security’ from our team at Popcorn Training. In this new 8-episode ...

Insurers Creating a Consumer Ratings Service for Cybersecurity Industry

Mar 27, 2019 7:06:25 AM By Stu Sjouwerman

The WSJ reported on news that a Collaborative effort led by Marsh & McLennan would score the best cyber security products for reducing hacking risk, and provide potential discounts on ...

Find out which of your users' emails are exposed before the bad guys do

Mar 27, 2019 6:46:15 AM By Stu Sjouwerman

Do you know how big your email attack surface really is? Open Source Intelligence (OSINT) is the collection of information from public sources on the Internet that both red teams and bad ...

Phishing Attack Compromises Spanish Defense Intranet By Foreign State

Mar 27, 2019 6:33:17 AM By Stu Sjouwerman

Reuters reported that a "computer virus" infected the Spanish Defense Ministry’s intranet this month with the aim of stealing high tech military secrets, El País newspaper said on ...

Norsk Hydro May Have Lost $40M in First Week After Ransomware Infection

Mar 27, 2019 6:20:18 AM By Stu Sjouwerman

Norwegian aluminum giant Norsk Hydro estimates that it may have lost more than $40 million in the first week following the ransomware attack that disrupted its operations.

Canadian Companies See Increases in Attacks, Breaches, and Sophistication in the Last 12 Months

Mar 26, 2019 10:47:52 AM By Stu Sjouwerman

If you read the latest Canadian Threat Report from Carbon Black, the Canadians have it bad… really bad. With increases across the board, Canadian organizations are needing to step up ...

CyberheistNews Vol 9 #13 [Heads-Up] This Evil New Child Porn Phishing Attack Could Absolutely Ruin Your Life

Mar 26, 2019 9:51:46 AM By Stu Sjouwerman

[NEW FEATURE] Upload Your Own Training Content

Mar 26, 2019 8:16:03 AM By Stu Sjouwerman

You asked, we listened! To simplify how you roll out and manage different training programs for your users, you can now use the KnowBe4 security awareness training platform for your ...

How LockerGoga, The Ransomware Crippling Industrial Firms Operates

Mar 26, 2019 7:05:31 AM By Stu Sjouwerman

Technically, LockerGoga is just another ransomware strain and not even a very good one. It's got bugs and it's slow. However, the gang behind it represents a dangerous combination of ...

U.S. Healthcare Employee Engagement with Simulated Phishing Emails Drop by 67% With Repeated Exposure

Mar 26, 2019 6:33:28 AM By Stu Sjouwerman

A long-term phishing study involving 6 healthcare institutions shows employees are vulnerable to phishing attacks, and that they can become more vigilant through exposure.

Kevin Mitnick Demos Password Hack: No Link Click or Attachments Necessary

Mar 25, 2019 10:28:22 AM By Stu Sjouwerman

In this shocking demonstration Kevin Mitnick, KnowBe4's Chief Hacking Officer, shows how hackers can steal a user’s password hash without the user having to click a hyperlink or open an ...

Mandatory vs. Elective Security Awareness Training

Mar 25, 2019 7:53:57 AM By Stu Sjouwerman

I frequently get variations of the following question: "I met with the CISO yesterday to discuss Awareness Training. He asked if KnowBe4's CEO would comment on the value of mandatory ...

[Heads-up] This Evil New Child Porn Phishing Attack Could Absolutely Ruin Your Life

Mar 24, 2019 3:29:36 PM By Stu Sjouwerman

Oh my. Bad guys have come up with a sinister new strain of blackmail/sextortion. Just when you thought things couldn't get worse, the bad guys sink lower. Eric Howes, KnowBe4's Principal ...

Ransomware Forces Two Chemical Companies to Order ‘Hundreds of New Computers’

Mar 23, 2019 10:06:26 AM By Stu Sjouwerman

Motherboard reported: "It appears that LockerGoga, the same ransomware that hit aluminum manufacturing giant Norsk Hydro this week, also infected American chemicals companies Hexion and ...

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