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Ransome ware - my files and photos have been encrypted


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#1 tadpole90

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Posted 10 December 2015 - 10:29 AM

Hallo

 

On 6/12/2015 I kept getting a pop up asking where my files were.  I attach a copy of the .png image.  It looks like it has encrypted my files with  RSA-2048 using CryptoWall.   They are demanding US$500.00 which will keep doubling on certain dates if it goes unpaid.  I have no intention of paying.  Unfortunately I do not have a recent backup.  I had installed shadow explorer, but everything there and all my restore points on 6/12/2015 and before have vanished.

 

Is there any way I can retrieve my files?

 

By the way, my windows 7 home premium  is validated now. 

 

Thank you

Attached Files


Edited by hamluis, 10 December 2015 - 11:18 AM.
Moved from Win 7 to Gen Security - Hamluis.


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#2 quietman7

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Posted 10 December 2015 - 06:19 PM

There are several variants of Cryptowall. CryptoWall 4.0 leaves ransom notes named HELP_YOUR_FILES.TXT, HELP_YOUR_FILES.HTML and HELP_YOUR_FILES.PNG and will encrypt the actual filename of an encrypted file as well as the data contained in it. Each encrypted file will have a unique name with random characters (0ausbffwh.p5, 72lcvn.iv6nn, x83o8x.ux7, etc). CryptoWall 4.0 uses a .JS file to download and execute a file from the %temp% folder. The initial installer injects the program that actually encrypts data into explorer.exe/svchost.exe. More information in this BC news article...A repository of all current knowledge regarding CryptoWall, CryptoWall 2.0, CryptoWall 3.0 & CryptoWall 4.0 is provided by Grinler (aka Lawrence Abrams), in this topic: CryptoWall and DECRYPT_INSTRUCTION Ransomware Information Guide and FAQ

Unfortunately at this time there is no fix tool and decryption of 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. For a more detailed explanation, read this reply by Nathan (DecrypterFixer). The only other alternative is to save your data as is and wait for a possible breakthrough...meaning, what seems like an impossibility at the moment (decryption of your data), there is always hope someday there may be a possible solution so save the encrypted data and wait until that time.

There is an ongoing discussion in this topic where you can ask questions and seek further assistance.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. Doing that will also ensure you receive proper assistance from our crypto malware experts since they may not see this thread. To avoid unnecessary confusion...this topic is closed.

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