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Decrypt files Filecoder.CR


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#1 itflowbox

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Posted 30 August 2015 - 07:04 PM

HEllo to everyone. One computer with no so much important files just someones has infectect with windows XP SP3. 
I have all the files encrypted but I think that maybe no exist a tool to solve that.
Hope that someone can helpme out with these.
 
Regards to all
 
Juan

Edited by Queen-Evie, 31 August 2015 - 07:36 AM.
moved from General Security to MRL


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#2 quietman7

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Posted 01 September 2015 - 05:45 PM

Win32/Filecoder is a crypto malware infection detected by ESET. According to their research lab, there are several different variants for which they add a modifier or additional information after the name that further describes what type of ransomware it is. Most of the Filecoder threat detections are more commonly identified as CryptoLocker, Cryptowall, and CTB locker.Detailed description for the Win32/Filecoder.E variant includes a HOW_TO_DECRYPT_FILES.txt.
Detailed description for the Win32/Filecoder.Q variant includes a HOW_TO_DECRYPT_FILES.txt.

Detailed description for the Win32/Filecoder.CR variant is not available.

Are there any file extensions appended to your files...such as .ecc, .ezz, .exx, .zzz, .xyz, .aaa, .abc, .CTBL, .CTB2, .XTBL, .encrypted, .vault, .HA3, .toxcrypt or 6-7 length extension consisting of random characters?

Did you find any ransom note? These infections are created to alert victims that their data has been encrypted and demand a ransom payment. Check your documents folder for an image the malware typically uses for the background note. Check the C:\ProgramData (or C:\Documents and Settings\All Users\Application Data) for a random named .html, .txt, .png, .bmp, .url file.

These are some examples.
HELP_DECRYPT.TXT, HELP_DECRYPT.HTML, HELP_DECRYPT.URL, HELP_DECRYPT.PNG
HELP_TO_DECRYPT_YOUR_FILES.bmp, HELP_TO_DECRYPT_YOUR_FILES.txt, HELP_RESTORE_FILES.txt
HELP_TO_SAVE_FILES.txt, HELP_TO_SAVE_FILES.bmp, RECOVERY_KEY.txt
DECRYPT_INSTRUCTION.TXT, DECRYPT_INSTRUCTION.HTML, DECRYPT_INSTRUCTION.URL
HOW_TO_DECRYPT_FILES.txt, How_To_Recover_Files.txt, About_Files, encryptor_raas_readme_liesmich.txt
RECOVERY_FILES.html, RECOVERY_FILES.txt, Recovery_File_*****.html, Recovery_File_*****.txt
restore_files_*****.html, restore_files_*****.txt (where ***** are random characters)

Once you have identified which particular ransomware you are dealing with, I can direct you to the appropriate discussion topic for further assistance.
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#3 itflowbox

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Posted 01 September 2015 - 05:56 PM

Thanks a lot for your answer. I only found two files HELP_DECRYPT.bmp and HELP_DECRYPT link to the virus website but doesn work. The worst problem is that the files are on a windows XP and I dont have chances to rollback o recover old versions. No exists any decryptor?

 

FOr example I have 2 files one encrypted and the original. Exist a way to compare and get the key to recover the others?

 

thanks again! :D



#4 quietman7

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Posted 01 September 2015 - 06:37 PM

- CryptoWall 3.0 leaves files (ransom notes) named:
HELP_DECRYPT.TXT
HELP_DECRYPT.HTML
HELP_DECRYPT.URL
HELP_DECRYPT.PNG
elf...the only evidence will be the ransom notes and registry keys.

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

Cryptowall typically deletes (though not always) 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 in case the infection did not do what it was supposed to do. Another possible options is to try file recovery software such as R-Studio or Photorec to recover some of your original files but there is no guarantee that will work.

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. The only other alternative is to save your data as is and wait for possible updates...meaning, what seems like an impossibility at the moment (decryption of your data) there is always hope someday there may be a breakthrough or possible solution so save the encrypted data and wait until that time.

There are also ongoing discussions in these topics:Rather than have everyone start individual topics, it would be best (and more manageable for staff) if you posted any more questions, comments or requests for assistance in one of those topic discussions. 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.

Thanks
The BC Staff
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