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 Bloomberg Crypto Account Bio Link Used in Discord Phishing Attack

Nov 21, 2023 4:25:38 PM By Stu Sjouwerman

Scammers used an outdated link found in an X (formerly Twitter) account belonging to Bloomberg Crypto to send users to a phishing site designed to steal Discord credentials, ...

73% of Organizations Affected by Ransomware Attacks Globally in 2023, According to Statista

Nov 21, 2023 4:25:14 PM By Stu Sjouwerman

I recently wrote about how 1 in 34 organizations globally has experienced an attempted ransomware attack. But that statistic doesn’t provide enough context around the impact felt by the ...

CyberheistNews Vol 13 #47 [Heads Up] FBI Warning: How Callback Phishing Makes It Past All Your Filters

Nov 21, 2023 9:00:00 AM By Stu Sjouwerman

With Expected Increases of Holiday Sales Comes Similar Expectations of More Cyber Scams

Nov 20, 2023 3:08:48 PM By Stu Sjouwerman

If increases in cyberattacks this year are any indication of what to expect in the next six weeks of holiday shopping, we should expect a massive uptick in holiday-related scams.

Cybercrime Group "Scattered Spider" is a Social Engineering Threat

Nov 20, 2023 3:08:35 PM By Stu Sjouwerman

The US Cybersecurity and Infrastructure Security Agency (CISA) and the FBI have released a joint Cybersecurity Advisory describing the Scattered Spider cybercriminal gang’s activities.

KnowBe4 Integrates With Cisco Duo To Streamline Secure Sign Ins

Nov 17, 2023 10:56:46 AM By Stu Sjouwerman

Social engineering remains one of the top attack vectors that cybercriminals use to execute malicious acts. KnowBe4’s security awareness training and simulated phishing platform allows ...

Johnny Jet's $3,000 Podcast Scam Nightmare – Unveiling the Elaborate Con that Hijacked his Facebook Kingdom

Nov 17, 2023 10:14:29 AM By Stu Sjouwerman

Travel influencer Johnny Jet has disclosed that he fell victim to a scam that caused him to lose access to his Facebook account, which has tens of thousands of followers. The scammers ...

QR Code Phishing Attacks Surging

Nov 17, 2023 10:14:02 AM By Stu Sjouwerman

The massive uptick in QR Code phishing is an indicator that scammers are seeing success in taking victims from the initial attack medium to one under the attacker’s control.

[Keynote Announcement] See Rachel Tobac at KB4-CON 2024!

Nov 17, 2023 8:00:00 AM By Stu Sjouwerman

We can’t keep this a secret any longer! Rachel Tobac will be joining us live at KB4-CON 2024, happening in Orlando, Florida March 4-6. She’s an ethical hacker and three time winner of DEF ...

BlackCat Ransomware's New SEC Reporting Tactic: Turn Regulations Against Victims

Nov 16, 2023 4:42:05 PM By Stu Sjouwerman

Man Bites Dog: In an unusual twist in cybercrime, the ransomware group BlackCat/ALPHV is manipulating the SEC's new 4-day rule on cyber incident reporting to increase pressure on their ...

How to Help "Frequent Clickers" Become More Mindful

Nov 16, 2023 1:58:59 PM By Stu Sjouwerman

Within our organizations, there are those employees who consistently exhibit mindfulness, avoiding every phishing attempt. Yet, there are also those users who, despite repeated education ...

AI-Manipulated Media Through Deepfakes and Voice Clones: Their Potential for Deception

Nov 15, 2023 12:22:47 PM By Stu Sjouwerman

Researchers at Pindrop have published a report looking at consumer interactions with AI-generated deepfakes and voice clones.

It’s Official: Scams Via Email and Text are Inescapable as Nearly Every American Receives Fake Messages Daily

Nov 15, 2023 12:22:43 PM By Stu Sjouwerman

New findings show that the overwhelming majority of people have to sort through scam messages and texts.

Online Scammer Poses as Skype, Swindles Victims Through Cryptocurrency Scam

Nov 14, 2023 2:01:21 PM By Stu Sjouwerman

Researchers at SlowMist describe a phishing campaign that’s distributing a phony version of Skype in order to steal cryptocurrency, Cointelegraph reports. The malicious app was likely ...

1 Out of Every 34 Organizations Worldwide Have Experienced an Attempted Ransomware Attack

Nov 14, 2023 2:01:17 PM By Stu Sjouwerman

With organizations globally experiencing an increase in attempted ransomware attacks year over year, new data shows how the global average isn’t even the worst news.

[Holiday Resource Kit] The Holiday Season is Here. How Are You Staying Cyber Safe?

Nov 14, 2023 9:15:24 AM By Stu Sjouwerman

It's the busiest time of year for everyone, especially cybercriminals. They know surges in online shopping, holiday travel and time constraints can make it easier to catch users off their ...

CyberheistNews Vol 13 #46 [Heads Up] Cybersecurity Expert: AI Lends Phishing Plausibility for Bad Actors

Nov 14, 2023 9:00:00 AM By Stu Sjouwerman

AI Disinformation Exposed: A Fake "Tom Cruise" Attacks the Olympics

Nov 12, 2023 10:12:07 AM By Stu Sjouwerman

Using a page straight out of the KGB playbook, a new AI-driven disinformation attack has been unleashed. The latest victim of this disturbing trend is none other than the International ...

[INFOGRAPHIC] Original Research: Cybersecurity Challenges Faced by European Infosec Leaders

Nov 10, 2023 8:00:00 AM By Stu Sjouwerman

Cybersecurity threats continue to put European organisations of all sizes at risk. Infosec leaders face multi-pronged challenges, from mitigating the threats themselves to managing the ...

“Skillful Social Engineering of the IT Support Desk” One of the Most Common Tactics in Ransomware Attacks

Nov 9, 2023 3:57:11 PM By Stu Sjouwerman

As ransom payments reach an all-time high, it’s time to look at attacks from a data perspective and find the greatest opportunities to stop these attacks.

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