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Virus encrypted my files


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#1 snapjaw

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Posted 09 November 2015 - 10:53 PM

Hey my pc started acting slow and I accidentally hit yes on this popup.

2e6bh2u.jpg

Then my system restore points were deleted and I could not run malwarebytes. I manually restarted and this popped up by itself.

jq422h.jpg


I would really appreciate any help you guys can give.

My PC Specs
Windows 7 Home Premium 64 bit
Intel Core i5-2500K CPU @ 3.30 GHz
4 GB RAM
Evga Geforce GTX 580


Edited by hamluis, 10 November 2015 - 07:56 AM.
Moved to Gen Security - Hamluis.


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#2 garioch7

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Posted 10 November 2015 - 06:48 AM

Snapjaw:

 

Your computer has been infected with crypto-ransomware.  We are not permitted to disinfect with seriously compromised computers in this Forum.

 

Please go to the Virus/Trojan/Spyware, and Malware Removal Logs Forum and follow the instructions in this link before posting there.  You can link to this thread.

 

You will be assisted there by a fully trained malware removal specialist.  Please do not bump your post if you don't get an immediate reply.  That Forum is VERY busy, especially in the last few weeks.  It can take up to five days to receive an initial response.  I know that is frustrating, but there are simply too many posts for too few Malware Response Team members at the moment.

 

You can also visit the General Security Forum here at Bleeping Computer to learn more about the variants of crypto-ransomware and the odds of successfully recovering your files.  I am hoping that you have a recent backup.

 

http://www.bleepingcomputer.com/forums/f/45/general-security/

 

I hope this has been of some help, though I know that this must be very upsetting for you.  Be patient - they will get to you.

 

Regards,

-Phil


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#3 quietman7

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Posted 10 November 2015 - 10:23 AM


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

Any files that are encrypted with the newer variant of TeslaCrypt will have the .exx, .xyz, .zzz, .aaa, .abc or .ccc extension appended to the end of the filename. The .aaa/.abc/.ccc variant drops files (ransom notes) with names like Recovery_File_*****.html, Recovery_File_*****.txt, restore_files_*****.html, restore_files_*****.txt, HOWTO_RESTORE_FILES_*****.txt, HOWTO_RESTORE_FILES_*****.html, HOWTO_RESTORE_FILES_*****.bmp (where ***** are random characters) and pretends to be CryptoWall 3.0.

Your screen shot of the ransom note above (howto_recover_file_*****.txt) is similare to the HOWTO_RESTORE_FILES_*****.txt created by a TeslaCrypt variant.
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#4 snapjaw

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Posted 10 November 2015 - 12:54 PM

Okay, I started a thread in the section you were talking about. Here is the link http://www.bleepingcomputer.com/forums/t/595951/mbeso-ransomware-some-files-are-encrypted/

 

Oh and quietman7, the files have a .ccc extension. It only seems to be text files that are encrypted for now. Music and videos still play. Well we can continue this on the new thread I started. I accidentally posted the topic three times so I guess the most recent one will be used.

 

Edit: Also I have some video files on my computer that I am still able to watch. Can I watch them on my infected computer or should I just leave my PC off unless I'm trying to fix it?


Edited by snapjaw, 10 November 2015 - 12:57 PM.


#5 quietman7

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Posted 10 November 2015 - 02:26 PM

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

Reading that Guide will help you understand what CryptoWall does and provide information for how to deal with it.

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 option 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. CryptoWall ransomware encrypts data using RSA encryption...everyone has their own individual private key which cannot be used with someone else's encrypted files. CryptoWall generates the individual private keys on their C2 server and only the public key is sent over the wire. 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 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 about file decryption 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.

Any and all questions in regards to removing the malware should only be addressed in the other topic you started and posted your FRST log.

To avoid unnecessary confusion...this topic is closed.

Thanks
The BC Staff


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