KnowBe4 Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in human and agent security including social and prompt 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

[Heads-up] Ransomware Criminals Hack An Accounting Company And Cause A Data Breach For Their Customers

Last December, a ransomware infection of Albany, New York-based accounting firm BST & Co. CPAs LLC exposed the confidential data of their customers, causing a data breach for one of ...

Massive 13,467% Growth in WhatsApp Phishing URLs Seen as Top Impersonated Domains Are on the Decline

The latest data from email security vendor Vade Secure shows drastic shifts in domain impersonation trends cybercriminals are using to carry out phishing attacks.

Ransomware Attack Leaves 43,000 Employees Without Email

The recent attack on facilities management company ISS has created a significant disruption in their operations, communication, and services worldwide.

The Real-life Email You Never Want To Get From Your CEO Because The Feds Called...

From The Desk Of Mark *********, CEO, ********* Corporation

Here Is A Real-life Bank Phone Scam Blocked By A Security Awareness Trained Employee

Brad Mathis at our partner Keller Schroeder sent me the following real-life story from Matt, a KnowBe4 Security Awareness Training client...

Emotet Malware Shows Up in SMiShing Attacks Disguised as Bank Notifications

A newly discovered attack looks to try to make a victim of mobile device holders using a two-pronged attack that uses Emotet and, perhaps, Trickbot.

Most Organizations Stick to Legacy Password Security Practices Despite Experiencing Cyberattacks

In a surprising twist, new data sheds light on the lack of proper security around passwords and authentication by IT at a time when cyberattacks are all but an absolute given.

Courts: Banks $2 Million in Losses from a BEC Attack Aren’t Covered by Cyberinsurance

Using emails impersonating the wife of a senior executive at Crown Bank, cybercriminals were able to take the bank for $2 million – an amount the courts held the bank responsible for.

Phishing URLs Increase 640% as Organizations (Finally!) Embrace Security Awareness Training

The latest data from security vendor Webroot shows how cybercriminals are changing their attack methods and targets – and how Security Awareness Training makes the difference.

New Spear Phishing Campaign Targets 27 Famous Brands With Malicious SLK Files

A new spear phishing campaign is targeting twenty-seven companies around the world with malicious SLK (Symbolic Link) files, according to BleepingComputer. The attackers pose as a real ...