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

US Government Agency Spear Phished With New CARROTBALL Malware

According to new research posted by Palo Alto Networks' Unit 42, a US Government agency and two non-US foreign nationals professionally affiliated with North Korea were targeted by spear ...

Ransomware Costs Double as Attacks Increase in Downtime and Sophistication

With payouts as much as $780,000, new data shows ransomware threat actors are going after every sized organization doing more damage and asking for more money.

New EFS Ransomware Attack Uses Windows Encrypting File System Against Itself

The newly-spotted form of ransomware takes advantage of encryption capabilities built into Windows making it difficult for AV vendors to stop it.

Domain-Impersonation Increases by 400% as part of Conversational Hijacking Attacks

The latest data from security vendor Barracuda suggests that attackers heavily rely on lookalike domains as part of BEC scams that can result in CEO fraud, malware infection, or ransom.

FDIC Warns U.S. Financial Institutions of Elevated Risk of Cyberattack

Citing “increased geopolitical tension”, banks are warned to immediately reevaluate to shore up cybersecurity controls and technology safeguards against ransomware and malware attacks.

New Phishing Attack Emerges Targeting ADP Users Wanting Their W2

For those looking to get their taxes done early, watch out for emails impersonating ADP offering a link to retrieve your W2 early!

Scam Of The Week: Exit Windows 7, Enter Scams

Microsoft ended support for the Windows 7 operating system on January 14th, and scammers are taking advantage of the long-anticipated news to launch tech support scams, according to the ...

Conversation-Hijacking Attacks Make It Almost Impossible to Avoid Becoming a Victim

Attackers target organizations to insert themselves into group email conversations as a way of ensuring the likelihood that one or more recipients are happy to unwittingly infect ...

The Great Crimeware Awakening

The bad guys are taking advantage of their new digital bounty. Ransomware is just the beginning to show us how bad it is soon going to be. We really had no idea how bad it was going to ...

Amazon Phishbait Chums British Waters

Action Fraud, the UK's fraud reporting center, has warned of a widespread phone scam targeting Amazon customers. The phone calls are automated and inform recipients that their Amazon ...