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

Old Dog, New Trick: Hackers Use Logons in URLs to Bypass Email Scanners

Jun 7, 2022 7:17:26 PM By Stu Sjouwerman

A new phishing method uses a decades-old special URL format to take advantage of how security solutions and email clients interpret URLs, tricking victims into clicking.

“Five Eyes” Nations Cybersecurity Authorities Issue Warning to MSPs of Stepped-Up Cyberattacks

Jun 7, 2022 7:17:12 PM By Stu Sjouwerman

The world’s five leading cybersecurity authorities have again issued a joint report about an increase in malicious cyber activity targeting managed service providers they expect to ...

The Good, the Bad, and the Necessary State of Cyber Insurance

Jun 7, 2022 7:16:59 PM By Stu Sjouwerman

New data from security vendor Sophos shows that while the presence of cyber insurance coverage has increased, it’s the experiencing of attacks that’s driving the need.

Phishing Attacks Reach an All-Time High, More Than Tripling Attacks in Early 2022

Jun 7, 2022 7:16:28 PM By Stu Sjouwerman

Reaching more than 1 million attacks in a single quarter for the first time, new data on phishing attacks in Q1 of 2022 show an emphasis on impersonation and credential theft.

CyberheistNews Vol 12 #23 [Heads Up] Our Global Ransomware Damage Will Be More Than 265 Billion by 2031

Jun 7, 2022 9:11:51 AM By Stu Sjouwerman

FTC Warns that Scammers are Turning to Cryptocurrencies

Jun 7, 2022 8:44:38 AM By Stu Sjouwerman

The US Federal Trade Commission (FTC) has warned that people have reported losing over $1 billion in crypto to scams since the beginning of 2021. The vast majority of these losses were ...

What is a Security Tech Stack?

Jun 7, 2022 8:27:31 AM By Stu Sjouwerman

What is a security tech stack? This is a bare-bones quick overview.

Homographic Domain Name Phishing Tactics

Jun 6, 2022 1:00:22 PM By Stu Sjouwerman

Bitdefender warns that Microsoft Office applications are vulnerable to phishing tactics that exploit international domain names (IDNs). Affected applications include Outlook, Word, Excel, ...

[On-Demand Webinar] Understanding the Threat of NFT and Cryptocurrency Cyber Attacks and How to Defend Against Them

Jun 6, 2022 11:39:00 AM By Stu Sjouwerman

A growing number of organizations worldwide are utilizing cryptocurrency for a host of investment, operational, and transactional purposes. Seemingly overnight, technologies like ...

Your KnowBe4 Fresh Content Updates from May 2022

Jun 3, 2022 8:09:30 AM By Stu Sjouwerman

Check out the 26 new pieces of training content added in April, alongside the always fresh content update highlights and new features.

Smishing and Home Delivery

Jun 2, 2022 9:10:57 AM By Stu Sjouwerman

A smishing campaign is impersonating the UK-based delivery company Evri with text messages informing recipients that their package couldn’t be delivered, according to Paul Ducklin at ...

SideWinder Targets Pakistani Entities With Phishing Attacks

Jun 2, 2022 9:09:56 AM By Stu Sjouwerman

The India-aligned APT SideWinder is using a variety of social engineering techniques to target Pakistani government and military entities, according to researchers at Group-IB. The threat ...

U.K.’s National Health Service Becomes the Latest Victim of a Credential Harvesting Phishing Operation

Jun 1, 2022 6:09:40 PM By Stu Sjouwerman

Part of a six-month attack, email accounts on the NHS’ Microsoft 365 instance were compromised, resulting in over 1,100 targeted email attacks used to obtain more credentials.

Phishing Attacks Rise 54% as the Initial Attack Vector Across All Threat Incidents

Jun 1, 2022 6:09:19 PM By Stu Sjouwerman

As cybercriminal groups hone their craft, one analysis shows them shying away from zero-day exploits, use of valid accounts, and third-party vulnerabilities to gain initial access during ...

The Business (and Success) of Ransomware Explained as a Simple Funnel

Jun 1, 2022 6:08:53 PM By Stu Sjouwerman

The rise of Ransomware-as-a-Service has given rise to a number of more successful groups who have their “business” down to a simple exercise of playing the numbers.

CyberheistNews Vol 12 #22 [Heads Up] The New Verizon 2022 Data Breach Investigation Report Shows Sharp Rise in Ransomware

Jun 1, 2022 8:59:33 AM By Stu Sjouwerman

Verizon: Ransomware Involved in 25% of Data Breaches as Credentials and Phishing are Seen as “Key Paths” for Attack Success

May 25, 2022 12:30:10 PM By Stu Sjouwerman

With the much-anticipated annual Verizon Data Breach Investigations Report finally released, we get a view of ransomware from the data breach perspective that points to a common weakness ...

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