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

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Give Me £1,000 to Stop Calling You

Mar 17, 2021 7:14:28 AM By Stu Sjouwerman

Some scammers are taking a more direct approach to asking for money, according to BBC reporter Jane Wakefield. Wakefield received a call from a scammer who claimed to work for Microsoft, ...

[THIS IS UGLY] A Hacker Got All My Texts for $16

Mar 16, 2021 10:50:55 AM By Stu Sjouwerman

VICE just revealed a 2FA hole you can drive a truck through. A gaping flaw in SMS lets hackers take over phone numbers in minutes by simply paying a company to reroute text messages. This ...

CyberheistNews Vol 11 #11 [AN IMPORTANT] NIST Update That You Should Be Aware Of

Mar 16, 2021 9:23:53 AM By Stu Sjouwerman

FBI Warns Against Deepfakes' Potential for Social Engineering

Mar 16, 2021 8:22:52 AM By Stu Sjouwerman

The FBI has issued an advisory warning of an expected increase in the use of deepfakes for social engineering attacks. Deepfakes are images, videos, audio, or text created via AI to ...

Beware: Lots of COVID-19 Vaccine-Related Attacks Are Active and Looking for Their Next Victim

Mar 16, 2021 8:01:00 AM By Stu Sjouwerman

From spear phishing attacks, to malicious domains, to credential-hunting – as I predicted, COVID vaccines are the hot attack theme right now from just about every angle.

Exchange Exploit Attempts Surge Sixfold as Ransomware Lands

Mar 15, 2021 9:22:38 AM By Stu Sjouwerman

The Phil Muncaster at Info Security Mag had it first: "The number of global exploit attempts targeting vulnerable Microsoft Exchange servers has risen sixfold over the past few days, as ...

The Evolving Cybercriminal Market Has Given Birth to Impersonation-as-a-Service as Attackers Seek to Impersonate at Scale

Mar 15, 2021 8:00:00 AM By Stu Sjouwerman

New research documents Impersonation-as-a-Service (IMPaaS) as an emerging threat where profiles of victim users are available to be used in campaigns where impersonation is critical.

[On-Demand Webinar] Avoiding Business Email Compromise Phishing Scams During Tax Season

Mar 15, 2021 8:00:00 AM By Stu Sjouwerman

Taxes are unavoidable, and unfortunately, so are the annual tax-related phishing scams. This year, with the COVID-19 pandemic continuing to keep people working from home, cybercriminals ...

The Most Commonly Spoofed Business-Related Applications in a Phishing Campaign

Mar 15, 2021 7:12:32 AM By Stu Sjouwerman

Business-related applications like Zoom, Microsoft, and DocuSign are the most commonly spoofed services in phishing attacks, according to a new report from GreatHorn. Business apps made ...

Microsoft Exchange Server hacks ‘doubling’ every two hours | ZDNet

Mar 12, 2021 9:18:55 AM By Stu Sjouwerman

Cyberattackers are taking full advantage of slow patch or mitigation processes on Microsoft Exchange Server with attack rates doubling every few hours. According to Check Point Research ...

[Security Alert Webinar] The Microsoft Exchange Mass Hack Is a Huge Security Risk For All Organizations and What You Can Do About It

Mar 11, 2021 3:52:43 PM By Stu Sjouwerman

On March 2, Microsoft released emergency security updates to plug multiple zero-day security holes in Exchange Server versions 2010 through 2019 that hackers were actively using to siphon ...

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Stu Sjouwerman

Books

Recent Posts

Give Me £1,000 to Stop Calling You

[THIS IS UGLY] A Hacker Got All My Texts for $16

CyberheistNews Vol 11 #11 [AN IMPORTANT] NIST Update That You Should Be Aware Of

FBI Warns Against Deepfakes' Potential for Social Engineering

Beware: Lots of COVID-19 Vaccine-Related Attacks Are Active and Looking for Their Next Victim

Exchange Exploit Attempts Surge Sixfold as Ransomware Lands

The Evolving Cybercriminal Market Has Given Birth to Impersonation-as-a-Service as Attackers Seek to Impersonate at Scale

[On-Demand Webinar] Avoiding Business Email Compromise Phishing Scams During Tax Season

The Most Commonly Spoofed Business-Related Applications in a Phishing Campaign

Microsoft Exchange Server hacks ‘doubling’ every two hours | ZDNet

[Security Alert Webinar] The Microsoft Exchange Mass Hack Is a Huge Security Risk For All Organizations and What You Can Do About It

Credential Harvesting Attacks Targeting the U.S. Federal Government Nearly Double as Malware Declines

FINRA Warns of Phishing Attacks

See what happened when we "Zoom bombed" a customer with the cast of The Inside Man

[Heads Up] Has Your Exchange Been Hacked And Is Now A Ticking Time Bomb?

Fake reCAPTCHA Found in Phishbait

Recognizing Elder Scams

CyberheistNews Vol 11 #10 [Heads Up] The Bad Guys Now Likely Own Your Exchange OWA Server

The Different Scenarios How Backups are Vulnerable to Ransomware Attacks

WSJ: Russian Disinformation Campaign Aims to Undermine Confidence in Covid-19 Vaccines

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