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

Phishing Resistant MFA Does Not Mean Un-Phishable

Human societies have a bad habit of taking a specific, limited-in-scope fact and turning it into an overly broad generalization that gets incorrectly believed and perpetuated as if it ...

[Scam of The Week] New Phishing Email Exploits Twitter’s Plan to Charge for Blue Checkmark

Michael Kan at PCMag had the scoop: A hacker is already circulating one phishing email, warning users they'll need to submit some personal information to keep the blue verified checkmark ...

Australia's Lacking Cybersecurity Workforce Results to a Influx in Attacks

Australia has now become the newest target for attacks in part due to an overworked cybersecurity workforce that is not able to stop these bad actors.

[WARNING] Micro Transactions Lead to a Drained Bank Account

Our friend R. Friederich at Marshalsec sent us this warning...

LinkedIn Phishing Attack Bypassed Email Filters Because it Passed Both SPF and DMARC Auth

Researchers at Armorblox have observed a phishing campaign impersonating LinkedIn. The emails inform the user that their LinkedIn account has been suspended due to suspicious activity.

[EYE OPENER] Phishing Attacks 61% Up Over 2021. A Whopping 255 Million Attacks This Year So Far

Security Magazine wrote this week about the recent eye opening SlashNext State of Phishing report. "SlashNext analyzed billions of link-based URLs, attachments and natural language ...

The Number of Vulnerabilities Associated with Ransomware Grows 426% Over Three Years

With only 57 vulnerabilities tied to ransomware back in 2019, the most recent data from security vendor Ivanti shows that number predicted to be over 300 by the end of 2022.

Ransomware Attacks Via RDP Drop Significantly as Phishing Continues to Dominate

Since 2018, remote desktop compromise (RDP) and phishing have battled for dominance as the primary initial attack vector in ransomware attacks. The latest data shows that RDP is no longer ...

Over Two-Thirds of Organizations Have No Ransomware-Specific Incident Response Playbook

A newly released report on ransomware preparedness shows organizations are improving their security stance in comparison to last year, but overall still aren’t doing enough.