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.xz files can be opened by WinZip. It’s not a very popular format.

It’s the latest trick of cyber criminals to make you open it and infect your computer.


Please inform your users, colleagues, friends.




Email with a fake PDF booking attachment.


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pdf book


Opening the attachment points to a web site…


security warning


Which will download a file with a malware !


unlocking pdf





(‘Companies House’ is the United Kingdom’s registrar of companies)


Dear user,

Thanks for submitting the message to us for inspection:


fake companies house email - RansomSaver Synergy USA LLC


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It is Ransomware indeed. We tested it with the current RansomSaver version and it was marked as Ransomware..
The Companies House logo is quite catchy. I believe some people will definitely enable the content and get infected.


Companies House - RansomSaver Synergy USA LLC


There is code waiting to run and infect your computer…


The criminals registered a fake domain. It looks very real but it is not !

RansomSaver - Fake domain ransomware domain registration



Don’t forget to have your macro settings Disabled. (Do it for all of your computers)

See below for a short ‘How To’:









New Ransomware version storming the planet. It comes as a normal Word document:



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When you try to open the document you will be asked to update the Word Fields. Even if you have your Macro settings disabled, you will still get this message:



Do not click the Yes button because there is code hidden to encrypt your files:




New RansomSaver version available ! Includes all latest RansomWare variations.
Also includes a fix for handling .rar and .7z attachments.

When you get this pop up window in your Outlook, please click the “Yes” button to start the update.



Learn more


Click the “OK button to download files from our web site.
If your Outllook does not automatically exit, please close it yourself.


Start the setup process to update RansomSaver.