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RSA encryption problem


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#1 vinonitha

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Posted 30 January 2016 - 05:26 PM

I have windows 7. Suddenly few days ago, my internet explorer(wireless) stopped working. I realised none of my files were opening. their format were changed. when i tried opening the files it asked to me choose which i wanted to open with. there were few note files already created on my desktop named "help_recover_instructions+wvr.txt". few internet windows were also opened saying " all of ur files were protected by a strong encryption with RSA". can anyone help me with this problem?


Edited by Chris Cosgrove, 30 January 2016 - 06:00 PM.
Moved from 'Introductions' to 'General security'


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#2 quietman7

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Posted 30 January 2016 - 06:23 PM

Some TeslaCrypt variants leave ransom notes with names like recovery_file_[random].txt, recover_file_[random].txt, Howto_Restore_FILES.TXT, howto_recover_file_[random].txt, _how_recover_[random].txt, help_recover_instructions+[random].txt, how_recover+[random].txt.

TeslaCrypt includes several known versions with various extensions for encrypted files. Any files that are encrypted with TeslaCrypt 3.0 will have the .xxx, .ttt or .micro extension appended to the end of the filename. Any files that are encrypted with TeslaCrypt 2.0 (AlphaCrypt) will have the .ezz, .exx, .xyz, .zzz, .aaa, .abc, .ccc or .vvv extension appended to the end of the filename. Any files that are encrypted with the original TeslaCrypt will have the .ecc extension appended to the end of the filename.

Which file extension was used on your encrypted data?
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#3 vinonitha

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Posted 02 February 2016 - 07:10 PM

I tried something and it changed the exetnsion from one of the extension u r mentioning to something like this".txt.micro"



#4 quietman7

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Posted 02 February 2016 - 07:24 PM

There currently is no way of decrypting TeslaCrypt 3.0 .xxx, .ttt, or .micro variants since they use a different protection/key exchange algorithm, a different method of key storage and the key for them cannot be recovered. The .xxx, .ttt and .micro variants do not have a SharedSecret*PrivateKey so they are not supported by the current version of TeslaViewer. If infected with any of these extensions, backup all your encrypted files, send BloodDolly a private message with a link to few encrypted files after uploading them to SendSpace (see instructions in Post #1) and wait for solution.

A repository of all current knowledge regarding TeslaCrypt, Alpha Crypt and newer variants is provided by Grinler (aka Lawrence Abrams), in this topic: TeslaCrypt and Alpha Crypt Ransomware Information Guide and FAQ.

There is an ongoing discussion in this topic where you can ask questions and seek further assistance.You can also post comments in the related BC News article: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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