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

WhatsApp Phishing Scams Significantly Increase

The Southwark Police in London have warned of a spike in WhatsApp phishing scams, according to Paul Ducklin at Naked Security. The station tweeted, “We have seen a surge in WhatsApp ...

HMRC-Branded Phishing Attacks Targeting U.K. Users Saw an 87% Increase During COVID

Phishing scams impersonating the UK’s tax, payments and customs authority related to tax rebates or refunds have soared, according to new data obtained by a Freedom of Information (FoI) ...

Two-Thirds of Organizations Have Experienced Spear Phishing Attacks in 2021

Spear phishing is on the rise in both frequency and effectiveness, making it an even greater threat to organizations who let their defenses down – even a little.

Important Kaseya Notice! Turn VSA Off. Now. Ransomware. Updated

Saturday morning July 3: They were hit with a REvil ransomware attack it looks like. Friday July 2 at 11pm they said:

[BREAKING] NSA, Partners Release Cybersecurity Advisory on Brute Force Global Cyber Campaign

NSA and its US and British partners (the UK's NCSC and the US FBI and CISA) late this morning released an advisory detailing a Russian campaign ("almost certainly ongoing") to brute-force ...

New IcedID and QBot Phishing Campaigns Are Running Amuck

Researchers at Kaspersky recently spotted two widespread phishing campaigns delivering the IcedID and QBot banking Trojans. The majority of users targeted by the IcedID campaign were ...

Almost All LinkedIn User’s Data Has Been Scraped and is Up for Sale on the Dark Web

700 Million LinkedIn user’s personal details were posted for sale earlier this month, putting 92% of their userbase at risk of social engineering and spear phishing attacks.

Spear Phishing Impersonation Attacks Take on New Tactics to Become More Convincing and Effective

As part of Business Email Compromise attacks, spear phishing now plays a material role, with impersonation sitting firmly at the core of their social engineering tactics… in more ways ...

Yet Another Disk Image File Format Spotted in the Wild Used to Deliver Malware

Disguised as an invoice, cybercriminals use a Windows-supported disk image to obfuscate malware from email gateways and security scanners. The question is how viable will it be?

35% of Cybersecurity Incidents are Business Email Compromise (BEC) Phishing Attacks

With cybercriminals looking for the fastest means to get from attack to a big payout, BEC attacks are shifting tactics to adjust to organizations being better prepared.