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

Watch Out For This New Amazon Phishing/Phone Password Scam

Oct 15, 2017 10:25:46 AM By Stu Sjouwerman

So here’s a new one: a spoofed Amazon email claiming that Amazon has detected an unauthorized attempt to reset the password on the recipient’s account. A six digit code is provided along ...

A New Spear Phishing Attack Uses Compromised Government Servers And DNS

Oct 15, 2017 9:02:54 AM By Stu Sjouwerman

Cisco's Talos malware researchers posted about a highly sophisticated, targeted spear phishing attack using malicious Word attachments, spoofed to look like it was from the U.S. ...

Carbon Black Says Ransomware Kit Sales On The Dark Web Shoot UP 2,502%

Oct 14, 2017 11:09:24 AM By Stu Sjouwerman

A new report from Carbon Black’s Threat Analysis Unit (TAU) used their data and modeling techniques to come up with an estimate of ransomware sales transactions activity on the Dark Web. ...

Scam Of The Week: Las Vegas Shooting Victims Charity

Oct 12, 2017 11:47:11 AM By Stu Sjouwerman

And again—it is enough to make you nauseous—low-life scum on the internet is using a tragedy and try to scam money out of people that want to help the victims. The Nevada Attorney ...

Third Quarter 2017 Top-Clicked Phishing Email Subjects [INFOGRAPHIC]

Oct 11, 2017 5:16:00 PM By Stu Sjouwerman

KnowBe4 customers run millions of phishing tests per year, and we report quarterly on the latest top-clicked phishing email subjects in 3 separate categories: subjects related to social ...

CyberheistNews Vol 7 #40 The Notorious Dark Overlord Mafia Escalates Their Ransomware Threat and Terrorizes Whole Valley

Oct 9, 2017 9:55:17 AM By Stu Sjouwerman

How did the Ukraine become a Hotbed of Criminal Hacking?

Oct 8, 2017 10:01:48 AM By Stu Sjouwerman

The New York Times came out with a great backgrounder why the Ukraine is such a hotbed for cyber criminals like Gennadi Kapkanov, 33, a Russian-born Ukrainian hacker, the man suspected of ...

The Notorious Dark Overlord Mafia Escalates their Ransomware Threat

Oct 7, 2017 5:05:32 PM By Stu Sjouwerman

News has surfaced that the overseas Dark Overlord cyber mafia struck again and penetrated the Columbia Falls School Board system with ransomware. The seven-page ransom letter was filled ...

New Phishing Report: 90% of IT Execs Worry Most About Email Threats

Oct 7, 2017 11:33:19 AM By Stu Sjouwerman

Our colleagues at Phishme released the results of their US Phishing Response Trends Report, which looked at the phishing response strategies of two hundred senior IT security ...

New Survey: IT Security Spending Is Up, But Security Is Not, Ransomware Is The Biggest Worry

Oct 7, 2017 11:11:00 AM By Stu Sjouwerman

The second-annual Cyren-Osterman Research U.S. security survey shows a significant disconnect between rising IT security spending and a low level of confidence in current protection, ...

Two Important KnowBe4 Product Updates

Oct 5, 2017 1:45:00 PM By Stu Sjouwerman

1) KnowBe4 Announces Powerful New Feature: Smart Groups We have added a powerful new feature, Smart Groups, that will help you automate the path your employees take to smarter security ...

KnowBe4’s Record Q3 2017 Performance Fueled by Innovation and Increased Demand

Oct 4, 2017 9:24:36 AM By Stu Sjouwerman

Some excellent news. We announced record results for our Q3 2017, sales were 2.63X greater than Q3 2016. Q3 2017 marks our 18th straight quarter of growth, driven by an increasing ...

CyberheistNews Vol 7 #39 New Evil Locky Ransomware Strain Evades Machine Learning Security Software

Oct 3, 2017 9:54:09 AM By Stu Sjouwerman

Bitdefender Creates Ransomware Recognition Tool

Oct 2, 2017 7:18:35 AM By Stu Sjouwerman

The AV vendor created a free tool to help ransomware victims find which family and sub-version of ransomware has encrypted their data and then get the appropriate decryption tool, if it ...

Whole Foods Point Of Sale Data Breach. Did Amazon Buy An Organic Lemon?

Sep 29, 2017 9:39:02 AM By Stu Sjouwerman

Uh Oh. They just announced. Generally it's the tip of the iceberg, and then over time more details are released that show it was muuuch worse than initially expected. Looks like Amazon ...

New Locky Ransomware Strain Evades Machine Learning Security Software

Sep 29, 2017 7:18:56 AM By Stu Sjouwerman

Here is the latest tactic in the cat-and-mouse game between cybercrime and security software vendors. The bad guys have come up with new a ransomware phishing attack, tricking users to ...

Europol warns ransomware has taken cybercrime ‘to another level’

Sep 28, 2017 1:41:09 PM By Stu Sjouwerman

Europol, the European Union’s police agency, has warned of the significantly rising threat posed by ransomware. As Associated Press reports, delegates at an international conference were ...

Data points from Risk IQ Q2 Phishing Roundup

Sep 28, 2017 11:57:50 AM By Stu Sjouwerman

Threat Management Provider Risk IQ released data comparing the use of top 10 brands names in Phishing attacks from Q1 and Q2, 2017. The report doesn’t name the top ten brands favored by ...

CyberheistNews Vol 7 #38 Scam of the Week: "Fake-tortion" Phishing Attacks

Sep 25, 2017 9:53:56 AM By Stu Sjouwerman

Scam of The Week: "Fake-tortion" Phishing Attacks

Sep 24, 2017 10:25:57 AM By Stu Sjouwerman

OK, this is a heads-up about a new aggressive form of email attack that you need to warn your employees, friends and family about. The bad guys have beta-tested and refined it in ...

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