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How can I remove encryption from ransomware RSA-2048 from my PC and my files?


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#1 misslake

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Posted 21 March 2015 - 07:05 AM

So my PC has been infected with ransomware RSA-2048.  It has encrypted every single file on my PC, effectively preventing me from opening any document, photo, or file I've stored on any type of drive including Cloud drives live OneDrive (Microsoft SkyDrive) and iCloud.  I have downloaded Windows Defender and begun that process and I have also tried restoring my computer to a previous restore point in time and that did not work either.  Every single file folder contains four files from the ransomware, an HTML file, a TXT file, a PNG file and an Internet shortcut file that contains a message from the perpetrators.  Below I've copied and pasted what is in the TXT file which includes directions about how to pay the ransom, which I'm not doing.  The filenames are all alike and are HELP_DECRYPT.TXT.  I have already tried Crilock, and that did not recognize the files as having an encryption in that particular family, from what I understand of these things.  This is my first experience with this kind of malware and it is seriously nasty stuff!  Please help me get my computer back!

 

THIS IS THE MESSAGE I RECEIVED IN THE HELP_DECRYPT.TXT FILE:

 

What happened to your files ?
All of your files were protected by a strong encryption with RSA-2048 using CryptoWall 3.0.
More information about the encryption keys using RSA-2048 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem)


What does this mean ?
This means that the structure and data within your files have been irrevocably changed, you will not be able to work with them, read them or see them,
it is the same thing as losing them forever, but with our help, you can restore them.


How did this happen ?
Especially for you, on our server was generated the secret key pair RSA-2048 - public and private.
All your files were encrypted with the public key, which has been transferred to your computer via the Internet.
Decrypting of your files is only possible with the help of the private key and decrypt program, which is on our secret server.


What do I do ?
Alas, if you do not take the necessary measures for the specified time then the conditions for obtaining the private key will be changed.
If you really value your data, then we suggest you do not waste valuable time searching for other solutions because they do not exist.


For more specific instructions, please visit your personal home page, there are a few different addresses pointing to your page below:
1.http://paytoc4gtpn5czl2.torconnectpaycom/jY4hgx
2.http://paytoc4gtpn5czl2.torwalletpaycom/jY4hgx
3.http://paytoc4gtpn5czl2.walterwhitepaycom/jY4hgx
4.http://paytoc4gtpn5czl2.rossulbrichtpaycom/jY4hgx

If for some reasons the addresses are not available, follow these steps:
1.Download and install tor-browser: http://www.torproject.org/projects/torbrowser.html.en 
2.After a successful installation, run the browser and wait for initialization.
3.Type in the address bar: paytoc4gtpn5czl2.onion/jY4hgx
4.Follow the instructions on the site.


IMPORTANT INFORMATION:
Your personal page: http://paytoc4gtpn5czl2.torconnectpaycom/jY4hgx
Your personal page (using TOR): paytoc4gtpn5czl2.onion/jY4hgx
Your personal identification number (if you open the site (or TOR 's) directly): jY4hgx



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#2 quietman7

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Posted 21 March 2015 - 07:29 AM

:welcome: to Bleeping Computer.

A repository of all current knowledge regarding CryptoWall, CryptoWall 2.0 & CryptoWall 3.0 is provided by Grinler (aka Lawrence Abrams), in this tutorial: CryptoWall and DECRYPT_INSTRUCTION Ransomware Information Guide and FAQ

Reading that Guide will help you understand what CryptoWall (including versions 2.0 & 3.0) does and provide information for how to deal with it. Cryptowall typically deletes all Shadow Volume Copies with vssadmin.exe so that you cannot restore your files via System Restore or using a program like Shadow Explorer...but it never hurts to try. At this time there is no fix tool and Decryption of any CryptoWall Files...is impossible since there is no way to retrieve the private key that can be used to decrypt your files without paying the ransom.

There is also a lengthy ongoing discussion in this topic: CryptoWall - new variant of CryptoDefense Support & Discussion Topic.

Rather than have everyone start individual topics, it would be best (and more manageable for staff) if you posted any questions, comments or requests for assistance in that topic discussion.

Thanks
The BC Staff
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