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

The Cost of Paying in a Ransomware Attack Nearly Doubles While Downtime Also Increases

Apr 22, 2019 6:49:25 AM By Stu Sjouwerman

The latest data from Coveware shows increases across the board in ransoms, downtime, and average cost of an attack, mostly due to the increased use of the Ryuk ransomware variant.

U.K. Government: "80% Of Organizations Experience Phishing Attacks"

Apr 22, 2019 6:42:06 AM By Stu Sjouwerman

Despite maintaining an improved security posture over last year, 2019 brings additional attacks with a higher price tag, causing the U.K. government to urge organizations to do more.

Ohio Becomes the Third U.S. State to Adopt the NAIC’s Insurance Data Security Model Law

Apr 22, 2019 6:34:13 AM By Stu Sjouwerman

Ohio joins South Carolina and Michigan to create cybersecurity legislation modeled after the National Association of Insurance Commissioners’ (NAIC) Insurance Data Security Model Law.

Phishing Continues to be the Source of Health Data Breaches Totaling Over 1M Breached Records

Apr 22, 2019 6:28:39 AM By Stu Sjouwerman

The beginning of 2019 has proven that data breaches in the health industry aren’t going anywhere. And from the intel on the breaches, phishing is playing a predominant role.

[InfoGraphic] 56 Must Know Data Breach Statistics for 2019

Apr 20, 2019 10:29:40 AM By Stu Sjouwerman

Varonis spent a lot of time compiling a whole bunch of data breach stats that are very good ammo for budget requests. They also created an infographic with a quick executive summary. Did ...

New Articles And Templates From The KnowBe4 Tech Content Team

Apr 19, 2019 10:24:30 AM By Stu Sjouwerman

Hi everyone, we wanted to send a quick note about the major items the Tech Content Team has added to our knowledge base and KMSAT product in the last month.

Here are few Game of Thrones phishing scams you should know about and how to avoid them

Apr 18, 2019 5:23:17 PM By Stu Sjouwerman

With the Game of Thrones (GoT) Season 8 finally airing, bad guys are using a variety of social engineering tactics to trick your end-users.

A Mystery Agent Is Doxing Iran's Hackers And Dumping Their Code

Apr 18, 2019 5:00:35 PM By Stu Sjouwerman

Alyssa Foote at WIRED wrote: "NEARLY THREE YEARS after the mysterious group called the Shadow Brokers began disemboweling the NSA's hackers and leaking their hacking tools onto the open ...

[Heads-up] A GA County School System Only Just Escaped A 2 Million Dollar Cyber Attack

Apr 18, 2019 7:31:47 AM By Stu Sjouwerman

Armor, a leading global cloud security solutions provider, read the news about a recent cyberattack, where hackers targeted the payroll department of the city of Tallahassee, FL and ...

Scammers Impersonate Big UK Law

Apr 18, 2019 7:02:45 AM By Stu Sjouwerman

The UK’s Solicitors Regulation Authority (SRA) warned that scammers are impersonating a London law firm, Linklaters LLP, using phony job offers. The documents purport to come from the ...

Over 80% of All Phishing Attacks Targeted U.S. Organizations

Apr 17, 2019 12:02:05 PM By Stu Sjouwerman

U.S. entities remained the most attractive targets of phishing attacks throughout 2018, with an estimated 84% of the total volume of millions of incidents analyzed during the last year by ...

County Line Ransomware Fever

Apr 17, 2019 11:24:16 AM By Stu Sjouwerman

A ransomware attack against Genesee County, Michigan, was more extensive than county officials originally thought, SC Magazine says. The county’s systems were hit by the malware on ...

Smishing Down Under

Apr 17, 2019 11:18:02 AM By Stu Sjouwerman

Banking malware is being installed on Android devices via malicious links in SMS messages, CRN reports. Cisco Talos discovered the malware being advertised on an exploit forum, and found ...

Ransomware Attack Hits Stratford City Hall

Apr 17, 2019 11:12:40 AM By Stu Sjouwerman

Stratford city hall was the target of an apparent cyber-attack, but officials do not believe personal information was compromised.

I need your input and I've got a ONE-Question Super Short Survey!

Apr 17, 2019 10:36:26 AM By Stu Sjouwerman

I need your input and I've got a ONE-Question Super Short Survey! Are you lacking a (free) tool that gives you more insight about social engineering risks that your users are exposed to? ...

Phishing Attack Spoofs Email Security Firm

Apr 16, 2019 10:50:49 AM By Stu Sjouwerman

Ray Shultz at MediaPost's EmailINSIDER wrote about a nasty new way that the bad guys are trying to establish trust: spoofing the return path and received email headers of Barracuda in an ...

How And Why KnowBe4 Got An 800+ Million Valuation

Apr 16, 2019 10:05:52 AM By Stu Sjouwerman

I found a great article by Rey Mashayekhi at Fortune Magazine where Rey interviews KnowBe4 investor KKR Managing Director Vincent Letteri:

[SCAM OF THE WEEK]: Notre Dame Disaster Causes FireStorm Of Social Engineering And Misinformation

Apr 16, 2019 7:17:33 AM By Stu Sjouwerman

The Notre Dame Cathedral in Paris caught fire and was barely saved from total destruction. Millions of people visit every year and hundreds of millions feel a powerful, and personal, ...

Island Hopping Grows in Popularity as Attackers use One Victim to Create the Next

Apr 16, 2019 6:45:43 AM By Stu Sjouwerman

Cybercriminals no longer see your organization as just their next target; they see the organization as a valuable source of intel and the launch point for their next attack. In business ...

Insurers Discuss What to Expect from a Ransomware Attack, and How to Defend Yourself Against One

Apr 16, 2019 6:41:35 AM By Stu Sjouwerman

Ransomware tops the list of attacks for insurers of the food and beverage industry. Outdated software and lax user concern for security controls provide attacker with a way in.

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