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

Beware of Spoofed Vanity URLs

May 12, 2022 8:58:50 AM By Stu Sjouwerman

Researchers at Varonis warn that attackers are using customizable URLs (also known as vanity URLS) on SaaS services to craft more convincing phishing links. The attackers have used this ...

KnowBe4 Earns 2022 Top Rated Award from TrustRadius

May 11, 2022 9:47:43 AM By Stu Sjouwerman

We are proud to announce that TrustRadius has recognized KnowBe4 with a 2022 Top Rated Award.

Another Report of SEO in Phishing

May 11, 2022 8:56:12 AM By Stu Sjouwerman

Researchers at Netskope have observed a 450% increase in phishing downloads over the past twelve months, largely driven by attackers using SEO (search engine optimization) to improve the ...

Mustang Panda Uses Spear Phishing to Conduct Cyberespionage

May 10, 2022 9:49:56 AM By Stu Sjouwerman

The China-based threat actor Mustang Panda is conducting spear phishing campaigns against organizations in NATO countries and Russia, as well as entities in the US and Asia, according to ...

CyberheistNews Vol 12 #19 [Heads Up] There is a New Type of Phishing Campaign Using Simple Email Templates

May 10, 2022 9:38:48 AM By Stu Sjouwerman

Tricky SMTP Relay Email Spoofing. Man Convicted For 23M Phishing Scam. Email not displaying? | View Knowbe4 Blog CyberheistNews Vol 12 #19 | May 10th, 2022 [Heads Up] There is a New Type ...

Wave of Crypto Muggings Hits London's Financial District

May 9, 2022 10:29:12 AM By Stu Sjouwerman

Criminals in London are targeting digital currency investors on the street in a wave of “crypto muggings”, with victims reporting that thousands of pounds were stolen from their crypto ...

Business Email Compromise Shouldn’t Be the Cost of Doing Business

May 9, 2022 9:11:25 AM By Stu Sjouwerman

The FBI last week published a public service announcement updating its warnings about the continuing threat of business email compromise (BEC, also called CEO fraud). The problem has ...

10 of the Craziest Cyberattacks Seen In the Wild and How You Can Avoid Them

May 6, 2022 12:46:44 PM By Stu Sjouwerman

It feels like we hear about a new devastating cyberattack in the news every day. And attack methods seem to be proliferating at an exponential rate. So, which tactics should you be aware ...

Your KnowBe4 Fresh Content Updates from April 2022

May 6, 2022 8:00:00 AM By Stu Sjouwerman

Check out the 67 new pieces of training content added in April, alongside the always fresh content update highlights and new features.

Cozy Bear Goes Typosquatting

May 5, 2022 9:08:59 AM By Stu Sjouwerman

Researchers at Recorded Future’s Insikt Group warn that the Russian threat actor NOBELIUM (also known as APT29 or Cozy Bear) is using typosquatting domains to target the news and media ...

Microsoft is Leading the Way to a Password-Less Future

May 5, 2022 9:08:33 AM By Stu Sjouwerman

As we observe World Password Day to create awareness around the need for password security, Microsoft is looking for frictionless ways to eliminate passwords entirely.

SMTP Relay Email Spoofing Technique

May 4, 2022 9:30:35 AM By Stu Sjouwerman

Researchers at Avanan have observed a surge in phishing emails that abuse a flaw in SMTP relay services to bypass email security filters.

89% of Organizations Experienced One or More Successful Email Breach Types During the Last 12 Months

May 4, 2022 9:29:50 AM By Stu Sjouwerman

With the number of email breaches per year almost doubling in the last three years, organizations still don’t see email security solutions as being an effective means of stopping attacks.

FIN12 Threat Group Speeds Up Ransomware Attacks to Just Two Days After Initial Access

May 4, 2022 9:28:52 AM By Stu Sjouwerman

As detection times are reducing across the board, threat groups are improving their craft and are prioritizing speed as the key ingredient in ransomware attacks.

Organizations Have a 76% Likelihood of a Successful Cyberattack in the Next Year

May 4, 2022 9:28:05 AM By Stu Sjouwerman

New data from TrendMicro and Ponemon shows how almost organizations globally are not fully prepared for the looming threat of almost-certain cyberattacks.

CyberheistNews Vol 12 #18 [Heads Up] The 4 Major Tactics: How Hackers Steal Your Passwords and How To Defend Yourself

May 3, 2022 9:36:38 AM By Stu Sjouwerman

Man Convicted for $23 Million Phishing Scam Against the US DoD

May 3, 2022 8:48:59 AM By Stu Sjouwerman

A man in California has been convicted for stealing $23.5 million from the US Department of Defense in a phishing attack. The Justice Department explained in a press release that the man, ...

Phishing Campaign Uses Simple Email Templates

May 2, 2022 8:52:18 AM By Stu Sjouwerman

A phishing campaign is using short, terse emails to trick people into visiting a credential-harvesting site, according to Paul Ducklin at Naked Security. The email informs recipients that ...

75% of SMBs Would Only Survive Seven Days or less from a Ransomware Attack

Apr 28, 2022 6:05:02 PM By Stu Sjouwerman

With ransomware attacks on the increase, new data shows a material portion of small and medium business organizations are completely ill-equipped to address an attack.

Half of IT Leaders Say their Non-Technical Staff are Unprepared for a Cyber Attack

Apr 28, 2022 6:04:48 PM By Stu Sjouwerman

New data shows IT leadership believes users outside of IT create a “continued significant risk to organizations” despite having a layered security strategy to prevent attacks.

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