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Teslacrypt 3.0: how to save not infected files?

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#1 bluemodder


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Posted 02 February 2016 - 04:32 PM

Hi. My pc has been infected by Teslacrypt 3.0 and, unfortunately, the extension of infected files is .MICRO. I guess the infection is restricted, yet: just a few .txt files are encrypted, even if the three files named help-recover-instructions+mmx (or something like that) can be found in quite a large number of folders.
I scanned my pc with Combofix, which found some entries related to the ransomware.
I'd like to know if, deleting the registry entries mentioned in another post on this forum, the infection can be stopped, at least. Otherwise, can I connect my hard disk to another pc to copy the files that haven't been encrypted? Do I risk to spread the infection to that pc, too?
Thanks in advance

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#2 quietman7


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Posted 02 February 2016 - 06:12 PM

TeslaCrypt ransomware 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 as described in this news article and leave .html, .txt files (ransom notes) with names like recovery_file_[random].txt, recover_file_[random].txt, Howto_Restore_FILES.TXT and help_recover_instructions+[random].txt.

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 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.

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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