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

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Misconfigured Cloud Database Increases Risk of Social Engineering

Jun 28, 2021 8:49:19 AM By Stu Sjouwerman

DreamHost, a major website hosting provider, exposed 814 million user account records in an unsecured database, researchers at Website Planet have found. The data exposed included a ...

[HEADS UP] Over 400% Increase in Ransomware Victims

Jun 24, 2021 4:41:14 PM By Stu Sjouwerman

According to a recent report by OODA Loop, "Mandiant claims to have detected a 422% increase in victim organizations announced by ransomware groups via their leak sites year-on-year ...

Threat Actors use Google Ads to Target People Migrating to Encrypted Messaging Services like Signal and Telegram

Jun 24, 2021 10:34:26 AM By Stu Sjouwerman

Researchers at eSentire warn that threat actors have been using Google Ads to target people migrating from WhatsApp to other encrypted messaging services, particularly Signal and Telegram.

Attackers Abuse Google Docs for Phishing Attacks

Jun 24, 2021 8:48:29 AM By Stu Sjouwerman

Attackers are using a new technique to exploit Google Docs for phishing attacks, according to researchers at Avanan. The attackers take advantage of the fact that Google Docs ...

ADATA Ransomware Attack Results in the Publishing of 700GB of Data Stolen

Jun 24, 2021 8:33:40 AM By Stu Sjouwerman

The headline alone sounds the warning that ransomware gangs aren’t just threatening to release exfiltrated data; they’re full out retaliating when they don’t get their ransoms paid.

60% of Orgs Needed New Security Policies to Secure Their Remote Workforce

Jun 24, 2021 8:33:36 AM By Stu Sjouwerman

According to security compliance vendor ThreatSwitch in their 2021 Industrial Security Benchmark Report, organizations are waking up to the need for better awareness training.

80% of Ransomware Victim Organizations Experience a Second Attack

Jun 22, 2021 10:16:11 AM By Stu Sjouwerman

The impact of ransomware attacks is much more than just the sensationalized cost of ransoms. New data spells out how victim organizations have suffered at the hands of ransomware.

Leaked Copies of Windows 11 Could Be Tempting Phishbait for Techies

Jun 22, 2021 10:15:55 AM By Stu Sjouwerman

The latest anticipated release of Windows should be a reminder that even IT folks can be driven into a frenzy enough to miss the signs of a malicious campaign.

Why Phishing Attacks Are So Easy, Successful and Profitable – and What to do About It

Jun 22, 2021 10:15:40 AM By Stu Sjouwerman

With phishing attacks being thought to have started literally 25 years ago, what makes this age-old method so continually valuable as a tool for cybercriminals and scammers?

The Number of Phishing Sites in March Was Twice That of the Previous Year

Jun 22, 2021 10:15:22 AM By Stu Sjouwerman

With the number of phishing sites in Q1 overall up 47%, according to new data from Phishlabs, the bad guys are starting their year off letting you know… they mean business.

KnowBe4 Makes eSecurity Planet's Best Security Awareness Training for Employees 2021 List

Jun 21, 2021 3:47:18 PM By Stu Sjouwerman

Security awareness training has made leaps and bounds in the last couple of years. With the old-school approach, a few bagels and long, boring powerpoint presentations can only get you so ...

Credential Stuffing in the Travel and Retail Sectors

Jun 21, 2021 10:34:53 AM By Stu Sjouwerman

The travel and retail sectors are the top targets for credential stuffing attacks, according to Auth0’s State of Secure Identity report. Credential stuffing is a type of brute-force ...

CyberheistNews Vol 11 #24 [Scam of the Week] If Your Users Are Amazon Shoppers, Heed This Prime Day Phishing Alert

Jun 21, 2021 9:40:59 AM By Stu Sjouwerman

[Heads Up] If You're an Amazon Prime Shopper, Heed This Prime Day Phishing Alert

Jun 17, 2021 10:00:25 AM By Stu Sjouwerman

Amazon Prime Day is approaching on June 21st with special promotions. This also mean cybercriminals are ready to strike with leveraging 'special deals' on the online days that they will ...

Bad Security Habits During the Pandemic

Jun 17, 2021 8:56:44 AM By Stu Sjouwerman

56% of IT workers believe employees have acquired poor security habits while working remotely, according to Tessian’s Back to Work Security Behaviors report.

Ragnar Locker Ransomware Finds Its Next Victim in Taiwan Computer Memory Manufacturer ADATA

Jun 16, 2021 3:56:11 PM By Stu Sjouwerman

The ransomware attack occurring in late-May required the maker of consumer and industrial memory products to take systems offline, causing them to recover and upgrade affected systems.

The Number of Phishing Websites Hits an All-Time High Reaching Nearly 350% Growth

Jun 16, 2021 3:55:58 PM By Stu Sjouwerman

According to the newly released data from the Anti-Phishing Working Group, every metric measuring phishing attacks is up this year over last, spelling trouble for organizations.

Tax Organizations Need to Focus on Cybersecurity

Jun 16, 2021 11:01:28 AM By Stu Sjouwerman

Tax preparation companies and tax agencies are increasingly facing scams, fraud, and other attacks, according to Robert Capps, Vice President of Marketplace Innovation at NuData Security. ...

New BEC Phishing Attack Steals Office 365 Credentials and Bypasses MFA

Jun 15, 2021 2:01:41 PM By Stu Sjouwerman

Leveraging Microsoft Exchange’s Basic Authentication support, scammers were able to use harvested online credentials and bypass any MFA in place, giving them access to mailboxes.

Bad Cyber Hygiene: 54% Of Employees Admit They Use the Same Passwords Across Multiple Work Accounts

Jun 15, 2021 2:01:37 PM By Stu Sjouwerman

It appears that working from home causes employees to develop some very bad cyber habits, demonstrating that cybersecurity hygiene went from bad to worse mid-pandemic.

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