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

Russian Breach US Grid? Nah, Someone Fell For Social Engineering And Enabled Macros

Dec 31, 2016 10:38:19 AM By Stu Sjouwerman

Breathlessly, the Washington Post reports that the Russian Grizzly Steppe malware was found within the system of a Vermont power utility. Nah, they just dodged a bullet. This time someone ...

Russia Hacking America Started With Phishing Attacks

Dec 30, 2016 11:12:29 AM By Stu Sjouwerman

As one of his last actions in office, President Obama expelled 35 Russian diplomats spies in retaliation for Russia interfering with the U.S. election process, after intelligence agencies ...

Disk-Killer Malware Adds Ransomware Feature And Charges $200,000+

Dec 29, 2016 7:57:49 AM By Stu Sjouwerman

Talk about adding insult to injury with this new KillDisk version. Here is how social engineering can cost you dearly. The Sandworm cybercrime gang has upped its game. They were initially ...

CyberheistNews Vol 6 #52 [ALERT] Scam of the Week: George Michael Dies at 53. Watch out for Phishing Attacks

Dec 27, 2016 9:41:39 AM By Stu Sjouwerman

You Need To Know The Top 10 IT Security Trends For 2017

Dec 26, 2016 3:21:56 PM By Stu Sjouwerman

I have been looking at the coming year and what trends you will probably see actually deployed in your network. These trends are the practical things that will help you to keep your ...

Scam Of The Week: George Michael Dies At 53. Watch out for phishing attacks

Dec 26, 2016 11:16:50 AM By Stu Sjouwerman

Today, news broke that George Michael was found dead on Sunday at his home in Goring in Oxfordshire, England. He was 53. A police statement said: “Thames Valley Police were called to a ...

Download This Hacked App And Die - Literally.

Dec 22, 2016 8:09:40 AM By Stu Sjouwerman

In the WSJ of Dec 22, 2016 there is an article that hides the real headline. It talks about the research done by CrowdStrike which shows that the DNC hack was done by a hacker group known ...

Is Lynda.com A Hacking Victim? They Lost 55K Records Somehow...

Dec 19, 2016 1:58:43 PM By Stu Sjouwerman

Lynda.com, the online learning unit of LinkedIn, has reset passwords for some of its users after it discovered recently that an unauthorized external party had accessed a database ...

CyberheistNews Vol 6 #51 Scam of the Week: The 1 Billion Yahoo Hack

Dec 19, 2016 9:54:41 AM By Stu Sjouwerman

CyberheistNews | KnowBe4

L.A. County Phishing Attack: 750,000 record data breach

Dec 18, 2016 11:25:02 AM By Stu Sjouwerman

Confidential health data or personal information of more than 750,000 people may have been accessed in a cyberattack on Los Angeles County employees in May that led to charges this week ...

Scam Of The Week: The 1 Billion Yahoo Hack

Dec 18, 2016 8:15:13 AM By Stu Sjouwerman

This is getting old. It's all over the press... again. Here is a Reuters article where I am quoted, which covers the most recent billion-record Yahoo hack. Some people asked me after our ...

The rise of ransomware-as-a-service. Stu Sjouwerman CSO Interview

Dec 17, 2016 10:21:28 AM By Stu Sjouwerman

My Interview at CSO About Ransomware-as-a-Service Joan Goodchild, Editor-in-chief at CSO sat me down and asked why Ransomware-as-a-Service has taken off recently: "It’s not just your ...

KnowBe4 and Barracuda Team Up to Educate and Protect Users Against Phishing Attacks

Dec 17, 2016 9:37:33 AM By Stu Sjouwerman

KnowBe4, the most popular security awareness training and simulated phishing platform, and Barracuda Networks, Inc. (NYSE: CUDA), a leading provider of cloud-enabled security and data ...

IBM study: 70% of Businesses Attacked Pay Ransomware

Dec 15, 2016 3:56:17 PM By Stu Sjouwerman

A rather mind-blowing 70% of businesses hit by ransomware paid the hackers to regain access to hijacked systems and files, according to a new IBM X-Force Ransomware report. Of the ...

And Another Billion More Yahoo Accounts Hacked

Dec 14, 2016 9:40:21 PM By Stu Sjouwerman

In the September/ October timeframe this year it became clear that Yahoo had lost more than 500 million records which was the biggest hack of the year. Who knew that they would top ...

CyberheistNews Vol 6 #50 [ALERT] New And Scary Double-Ransomware Whammy

Dec 12, 2016 10:01:16 AM By Stu Sjouwerman

[ALERT] Yikes, A New And Scary Double-Ransomware Whammy.

Dec 11, 2016 12:05:07 PM By Stu Sjouwerman

Sophos reported on one of the more scary ransomware strains I have seen lately. It's called Goldeneye and encrypts the workstation twice: both the files and the Master File Table (MFT). ...

New Book Coming Soon from Kevin Mitnick for You

Dec 11, 2016 10:07:53 AM By Stu Sjouwerman

The Art of Invisibility: The World's Most Famous Hacker Teaches You How to Be Safe in the Age of Big Brother and Big Data Kevin Mitnick, the world's most famous hacker, and KnowBe4's ...

SanFran Muni Ransomware Hacker Gets Hacked Back!

Dec 11, 2016 9:47:49 AM By Stu Sjouwerman

A couple of weeks ago, a yet unknown attacker hacked the computer systems of the San Francisco’s Municipal railway causing a free ride for all that Saturday. The ransomware hacker was ...

Former NSA Director Michael Hayden: "We have a Russia Problem"

Dec 10, 2016 11:19:53 AM By Stu Sjouwerman

I have been saying this here for the last few years, but if you get it confirmed by a former NSA director, that's nice to hear. The Wall Street Journal just reported that President Barack ...

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