Human Risk Management Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in security including social 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

Tech support scammers abuse bug in HTML5 to freeze computers

Malwarebytes Researcher Jerome Segura reported on a new Tech Support scam that uses a known HTML5 bug to freeze the system and trick people to call a fake support number. Note, it does ...

City Of El Paso Victim Of 3 Million Dollar Phishing Scam

During a news conference Wednesday afternoon, city officials revealed that cybercriminals pretending to be a vendor scammed the city's Accounts Receivable Department out of about $3 ...

New Version Of Nymaim Malware Targets High-Level Managers

A new version of the Nymaim malware family targets high-level managers with attached malicious Word documents and drops ransomware and banking trojans. The cyber research team at Verint ...

Yes, that email is really from LinkedIn. And, yes, it's really malicious.

By Eric Howes, KnowBe4 Principal Lab Researcher. Several months ago we blogged about a startling discovery by threat researchers at Proofpoint: the bad guys had figured out a way to turn ...

Boy have we grown... KnowBe4 Halloween 2014, 2015, 2016

Halloween 2014 15 employees. Scroll down for the later years!

Scam Of The Week: Tech Support Claims Your Hard Disk Will Be Deleted

Symantec warns that tech support scams are getting more sophisticated by the month: "These scams remain one of the major and evolving forces in the computer security landscape. Between ...

How Podesta got hacked: HelpDesk said 'Password' phishing email was real

John Podesta, Chairman of the 2016 Hillary Clinton presidential campaign was a victim of social engineering and rushed advice from his IT helpdesk. It's a comedy of errors. The helpdesk ...

82% of Email Servers are Misconfigured, Allowing Domain Spoofing

We reviewed thousands of domains that have been through our domain spoof test and analyzed more than 10,000 email servers. We found that 82% of these are misconfigured.

Insurance underwriter Beazley: "Ransomware attacks will be four times higher in 2016"

The Wall Street Journal is getting the message. They said : "For companies concerned about the soaring number of ransomware attacks–in which hackers take control of data or systems and ...

Who Is Learning How to Take Down the Internet?

It was all over the news. A sustained DDoS attack that caused outages for a large number of Web sites Friday was launched with the help of hacked “Internet of Things” (IoT) devices. Jeff ...

Researchers discover new malicious IoT worm

Researchers at RapidityNetworks discovered a new malicious worm using Telnet that infects IoT devices using their insecure default credentials and uses a peer-to-peer network to install ...

Ransomware Strain Count Surpasses 200

Michael Gillespie tweeted: "Whew! ID #Ransomware can now identify 200 ransomware families. :) Sad such a milestone was hit so quickly..." He added a list from the malwarehunterteam site, ...

The New Posterboy of CyberInsecurity: John Podesta Fell For Social Engineering Attack

Motherboard has a great article explaining just how Podesta, Chairman of the 2016 Hillary Clinton presidential campaign got hacked. (Podesta previously served as Chief of Staff to ...

A Slick Phish with a Hidden Surprise

By Eric Howes, KnowBe4 Principal Lab Researcher. Yesterday one of our customers was hit with a highly targeted phishing attack -- one of the slicker attacks we've seen in a while. Once we ...

"My AV blocked RanSim.exe So I'm Safe" No You Are Not

I'm noticing a lot of people saying the ransim.exe file is getting blocked by your AV. You have to actually allow the initial processes to run to do the simulation. It is the five test ...

Python Ransomware Uses A Unique Key For Each File That Is Encrypted

A new ransomware strain written in Python called CryPy was disclosed by Avast malware analyst Jakub Kroustek. It seems that Pyton is getting more popular as a ransomware development ...


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