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Unlocking Cryptolocked files


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3 replies to this topic

#1 unclestewie

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Posted 03 September 2015 - 02:27 PM

I recently became infected with a cryptolocker virus. It is pointing me to a web address to find instructions for paying my ransom and receving the unlock key. I have not done this and am looking for tools that will decrypt the cryptolocker virus.  Thanks!!


Edited by hamluis, 04 September 2015 - 03:22 PM.
Moved from MRL to Gen Security - Hamluis.


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#2 quietman7

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Posted 04 September 2015 - 05:26 PM


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, DecryptAllFiles.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 unclestewie

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Posted 06 September 2015 - 08:48 AM

Thanks for the info. Here is what I found. Help_decrypt files (html, png, text, and internet shortcut) in all my folders. The ransom note indicated my files were encrypted with RSA-2048 using CryptoWall 3.0.

 

I did not see any random extensions to my files either.

 

Thanks for any help you can give.



#4 quietman7

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Posted 06 September 2015 - 06:28 PM


- CryptoWall 3.0 leaves files (ransom notes) named:
HELP_DECRYPT.TXT
HELP_DECRYPT.HTML
HELP_DECRYPT.URL
HELP_DECRYPT.PNG

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

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 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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