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cryptowall trojan ransonware virus


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5 replies to this topic

#1 stradbroke02

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Posted 18 January 2016 - 03:22 PM

has anybody got experience of this rather nasty virus?


Edited by hamluis, 18 January 2016 - 03:44 PM.
Moved from XP to General Security - Hamluis.


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#2 Demonslay335

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Posted 18 January 2016 - 03:27 PM

Do you have a ransom note, and do your files have any extensions added to them? There are hundreds of ransomware viruses out there, and many pretend to be the infamous CryptoWall.

 

Once we have determined which exact infection you have, we can direct you to the appropriate topic on support and whether it is decryptable at the present time.


logo-25.pngID Ransomware - Identify What Ransomware Encrypted Your Files [Support Topic]

ransomnotecleaner-25.png RansomNoteCleaner - Remove Ransom Notes Left Behind [Support Topic]

cryptosearch-25.pngCryptoSearch - Find Files Encrypted by Ransomware [Support Topic]

If I have helped you and you wish to support my ransomware fighting, you may support me here.


#3 stradbroke02

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Posted 18 January 2016 - 03:52 PM

When I removed the virus, other files went and I was just left with encrypted word documents and encrypted photos.

I have no doubt that it was the infamous Cryptowall.

The encrypted files are what I need to deal with.



#4 Demonslay335

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Posted 18 January 2016 - 03:58 PM

Can you provide a link to an encrypted file and the ransom note?

 

If it truly is CryptoWall (2.0, 3.0, or 4.0), then there is no way of decrypting the data; you can only restore from backups.


logo-25.pngID Ransomware - Identify What Ransomware Encrypted Your Files [Support Topic]

ransomnotecleaner-25.png RansomNoteCleaner - Remove Ransom Notes Left Behind [Support Topic]

cryptosearch-25.pngCryptoSearch - Find Files Encrypted by Ransomware [Support Topic]

If I have helped you and you wish to support my ransomware fighting, you may support me here.


#5 stradbroke02

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Posted 18 January 2016 - 04:11 PM

I have deleted ransom notes and at the moment I do not have access to the encrypted files.  They are on another computer in another property, so tomorrow !



#6 quietman7

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Posted 18 January 2016 - 04:52 PM

These are examples of various crypto malware ransom note names:
HELP_DECRYPT.TXT, HELP_YOUR_FILES.TXT, HELP_TO_DECRYPT_YOUR_FILES.txt, RECOVERY_KEY.txt
HELP_RESTORE_FILES.txt, HELP_RECOVER_FILES.txt, HELP_TO_SAVE_FILES.txt, DecryptAllFiles.txt
DECRYPT_INSTRUCTIONS.TXT, INSTRUCCIONES_DESCIFRADO.TXT, How_To_Recover_Files.txt, About_Files.txt
DECRYPT_INSTRUCTION.TXT, HOW_TO_DECRYPT_FILES.TXT, ReadDecryptFilesHere.txt, _secret_code.txt 
FILESAREGONE.TXT, IAMREADYTOPAY.TXT, HELLOTHERE.TXT, READTHISNOW!!!.TXT, SECRETIDHERE.KEY
IHAVEYOURSECRET.KEY, SECRET.KEY, Help_Decrypt.txt, HELP_DECYPRT_YOUR_FILES.HTML
YOUR_FILES.HTML, DecryptAllFiles_<user name>.txt, encryptor_raas_readme_liesmich.txt
DecryptAllFiles_.txt, RECOVERY_FILES.txt, help_decrypt_your_files.html, YOUR_FILES.url
Howto_RESTORE_FILES_.txt, RECOVERY_FILE.TXT, RECOVERY_FILE_.txt, restore_files_.txt
howto_recover_file_.txt, how_recover+[random].txt, _how_recover_.txt, recover_file_[random].txt

Note: The [random] represents random characters which some ransom notes names may include.
There are several variants of Cryptowall. The original CryptoWall leaves files (ransom notes) with names like DECRYPT_INSTRUCTION.TXT, DECRYPT_INSTRUCTION.HTML, and DECRYPT_INSTRUCTION.URL. CryptoWall 2.0 leaves ransom notes named install_tor.url. CryptoWall 3.0 leaves ransom notes named HELP_DECRYPT.TXT, HELP_DECRYPT.HTML, and HELP_DECRYPT.PNG but does not change the file extension of the file it encrypts. 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). 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).

There are ongoing discussions in these topics where you can ask questions and seek further assistance for the CryptoWall variant you are dealing with.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 the topic discussion related to the variant you are dealing with. 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.

Note: If further investigation reveals you are not dealing with CryptoWall, pleas PM me or Demonslay335 and we will direct you where to go.

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The BC Staff
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