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

15-year old MyDoom Remains a Common Phish Hook

The destructive email worm MyDoom is still very active more than fifteen years after it was first spotted, according to ZDNet. Researchers at Palo Alto Networks’ Unit 42 observed 663,000 ...

New Ransomware Strain Spreads Via SMS

A new Android ransomware strain was discovered by ESET researchers. It uses the victim's contact list to spread further using SMS messages that have malicious links.

Office 365 Administrators are the Target of the Latest String of Phishing Attacks

Using a mix of fake admin alerts and a spoofed logon page, this newest campaign leverages IT’s urgency in fixing critical issues before they impact users.

Iranian Hacker Group APT34 Use New ‘Tonedeaf’ Malware over LinkedIn in Latest Phishing Campaign

Targeting several key industries, this new campaign likely seeks to aid the Iranian government with information that could be of use to further Iran’s economic and security goals.

[Heads-up] Nationwide Bomb Threat Extortion Phishing Attack Campaign With A Twist

IN OFFICES AND universities all across the country Thursday, the same threat appeared in email inboxes: Pay $20,000 worth of bitcoin, or a bomb will detonate in your building. Police ...

Two Puerto Rico Hospitals Hit With Ransomware That Encrypts 520,000 Patient Records

The two hospitals were hit by ransomware infections and are one of the largest data breaches reported by the U.S. Department of Health. This particular incident encrypted all kinds of ...

Reuters: "BlackRock in talks to take over Cofense after U.S. security concerns - sources"

(Reuters) July 28, 2019 — "BlackRock Inc (BLK.N), an investor in Cofense Inc, is in advanced talks to take over the U.S. cyber security firm, after a U.S. national security panel asked ...

Schools In Both The US And UK Victim Of Recent Phishing Attacks

A number of educational institutions have recently fallen victim to cyberattacks, highlighting the need for increased awareness training for students and faculty. SC Media UK has ...

NSA Launches Cybersecurity Arm To Defend The U.S. From Foreign Adversaries

Kate O'Flaherty wrote in Forbes: "The National Security Agency has announced its intention to create a cybersecurity directorate this fall in a bid to defend the U.S. against foreign ...

Here Is Some Great InfoSec Budget Ammo From UBS

A KnowBe4 employee forwarded this PDF to me. There is a very interesting point in here: your cybersecurity practices affect the valuation of your company. That should get the attention of ...