Human Risk Management Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in security including social engineering, ransomware and phishing attacks.

Stu Sjouwerman

Founder and Executive Chairman

Stu Sjouwerman (pronounced “shower-man”) is the Founder and Executive Chairman 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.


Recent Posts

Phishing-Based Data Breaches Take 295 Days to Contain and Breach Costs Soar to $4.91 Million

Fresh data on data breach costs from IBM show phishing, business email compromise, and stolen credentials take the longest to identify and contain.

Microsoft 365 Users are Once Again the Target of Phishing Scams using Fake Voice Mail Messages

Using a simple email containing a voice mail attachment, an ingenious phishing attack captures credentials while keeping track of the domains being attacked.

Hackers Use Free Email Accounts from QuickBooks to Launch Spoofed Phishing Attacks

A new attack uses one brand email domain to increase the chances of reaching an Inbox, while spoofing another brand to trick users into transitioning to a vishing attack.

Spear Phishing Campaign Targets Facebook Business Accounts

Researchers at WithSecure have discovered a spear phishing campaign targeting employees who have access to Facebook Business accounts. The attackers are targeting specific employees, and ...

IBM: Phishing is the Most Common Way to Gain Access to Victim Networks

New research from IBM shows four reasons why phishing attacks are still effective and remains the primary attack vector in 41% of cyberattacks.

KnowBe4 Top-Clicked Phishing Email Subjects for Q2 2022 [INFOGRAPHIC]

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. We analyze 'in the wild' attacks reported via our Phish Alert Button, top subjects globally clicked on in ...

Nearly Half of Organizations Have Experienced Vishing

Forty-seven percent of organizations have experienced voice phishing (vishing) attacks over the past year, according to researchers at Mutare. Additionally, the researchers found that ...

New Report Reveals that Ransomware and Business Email Compromise Attacks Cause Nearly 70% of Cyber Incidents

Do you know your organizations true security risk and where to prioritize your resources? A new report from Palo Alto Networks sheds some light on these questions and shows multiple ...

[BEWARE] Microsoft and Facebook are the Most Abused Brands for Phishing Attempts

We all know that big brands can be exploited by bad actors in order to execute successful phishing attacks. Now a new study is showing phishing attacks leveraging big brands Microsoft and ...

Malvertising With Google Ads

Researchers at Malwarebytes warn that a large malvertising campaign is exploiting Google ads to redirect users to phishing sites.

Microsoft USB Scam Shows the Importance of Security Awareness Training

Just when you thought scammers couldn't get more tricky in their attacks, this example will prove you wrong. One of our KnowBe4 colleagues shared this LinkedIn post on a recent very ...

Ransomware Groups Get Smaller and More Social

The Colonial Pipeline ransomware attack of 2021 put infrastructure operators on notice that they were directly in the crosshairs of big ransomware gangs. The reaction of law enforcement ...

[Heads Up] Huge Losses Caused By Epidemic of ‘Pig Butchering’ Scams

Investigative reporter Brian Krebs reported today that U.S. state and federal investigators are being inundated with reports from people who’ve lost hundreds of thousands or millions of ...

FBI Warns of Phony Cryptocurrency Investment Apps

Cryptocurrency investors have lost nearly $43 million to fraudulent cryptocurrency investment apps, according to the US Federal Bureau of Investigation (FBI).

Cybersecurity Should be an Issue for Every Board of Directors

With so many Boards focused on operations, revenue, strategy, and execution, they completely are forgetting the simple fact that a single cyberattack can bring all that to a screeching ...

New Multi-Factor Authentication Prompt “Bombing” Attacks Give Access to Laptops, VPNs, and More

While multi-factor authentication (MFA) significantly reduces an organization’s threat surface by making the stealing of credentials much harder, a new attack takes advantage of phone ...

Copyright Claim Email is a LockBit Ransomware Phishing Attack in Disguise

The latest iteration in Copyright Claim scams is an evolution of this repeated attack method that has proven to get the attention – and response – of victims over the last few years.

Phishing Kit Imitates PayPal

Researchers at Akamai have discovered a PayPal phishing kit that attempts to steal victims’ identities as well as their financial information. The phishing page looks identical to ...


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