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Highly affected by Cryptowall. But a small ray of hope


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#1 Surekaa

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Posted 06 January 2016 - 11:30 AM

Dear Friends

 

I am the latest victim of Cryptowall attack. (Last week) I lost 64 GB of valuable data. Even from backup drive connected with the main computer. Worst part is, I kept on running the system for 9 hrs without my presence. So, The ransomware done everything.

 

But , When i came to know i am affected, I have detached the main hard disk and booted from another one. So, FORTUNATELY , after searching for a solution in whole week, I found a key file which claims PRIVATE KEY. (It happened just two hours back)

 

That means, I have the private key, they kept in the temp folder.  They have deleted all other traces.

 

So,  If i get that decrypter application , I hope i can recover my data. Otherwise, I have to pay them and get my data, Which is not my interest.

 

So, Please if anyone have the decrypter please send it to my mail id : 9789497531s@gmail.com as zip file.

 

I am very grateful to you guys.

 

I have only one day for their deadline.

 

Otherwise, If you want my key and affected sample file, I can send and to get verified.

 

Thanks in advance



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#2 Demonslay335

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Posted 06 January 2016 - 11:35 AM

Do your files have an extension, and what is the contents of the ransom note (and its filename). There are alot of copy-cats that claim to be CryptoWall but are not. I'm really suspicious that your "private key" is not what you think it is.


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 Surekaa

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Posted 06 January 2016 - 11:46 AM

Hi, Demonslay335,

 

My encrypted files have random extensions

 

Ransom note is HELP_YOUR_FILES.PNG, .TXT AND .HTML

 

I found a file named .key in my appdata temp folder having the headline in the file as i have opened in notepad...."RSA PRIVATE KEY"



#4 Demonslay335

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Posted 06 January 2016 - 11:49 AM

If all of your filenames are changed as well, then it is CryptoWall 4.0, which has no known way of decrypting.

 

If you do believe that file is a key though, I'll have to pass this along to the crypto-analysts here.


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 Surekaa

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Posted 06 January 2016 - 11:52 AM

When i opened the key file ... it Looks like this.. and it was created at the time of attack finishes... So that i am having littlebit hope  (All letters not shown...)

 

 

-----BEGIN RSA PRIVATE KEY-----

lke1iuYwMvqC7Qsq50NfDsVbokd3B4jg03eRkE+FlUNAB5gM5QXOReN19a5g+NG1
dx7FAwjL4rcWHkLX6eDhTT35DlN0ESp29nII1bEHAmAOBDLifbmNHuROkrsPX4C1
f0mH1j+7c7NFLdWC866N/OecByJQEObGYRWQZLlNUhuTck1go+Ee7Eg90hZTL52a
50q5p6z9lt37EOd2hdhcgg38cMpuOWUOr/3vYedRgUU=
-----END RSA PRIVATE KEY-----



#6 Surekaa

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Posted 06 January 2016 - 11:54 AM

Is there any way to decrypt it?

 

What i have to do ?

 

Really all of my works were messed up !!  :(



#7 Fabian Wosar

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Posted 06 January 2016 - 12:28 PM

CryptoWall doesn't create a private.key file. It's possible that you were hit by something else that pretends to be CryptoWall. Did you check the timestamps of the file if they match the incident? If not, chances are the file you found is unrelated to your infection.


Best regards,

Fabian Wosar [Development]
Emsisoft Team - www.emsisoft.com

#8 quietman7

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Posted 06 January 2016 - 05:28 PM

As Fabian Wosar has noted, the file you found is most likely related to something else and not your current infection.

CryptoWall 4.0 leaves files (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 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...encrypted-files.jpg

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).

As with most ransomware infections...the best solution for dealing with encrypted data is to restore from backups. If that is not a viable option, 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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