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TelsoCrypt 3/4


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#1 joetrader

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Posted 21 March 2016 - 11:19 PM

Hello All,

 

I have a Windows 7 computer that seems to have the newer version, 3/4 of telsa crypt.  I understand from reading some of the posts, that there is no way of decrypting.  What puzzles me is that the files do not seem to be encrypted as I can open them, though I am getting the ransom note that seems to open up in Corel, with a .png ext.,  pictures seem to open without the note, the only files that seem to bring up the note are Excel files but, when the notes are closed, the files open without issue and the data seen and manipulated.

 

I get an error message when opening up public Documents, My Music, My Pictures, My Videos, stating access is denied.  There were 3 files under each one of the headings, RECOVERenchc.html, .png, txt

Nothing was stored in there so it is not a big deal but, it is curious.  The user data is primarily in Documents in the user profile.

 

AND, these same three files are in many of the folders and subfolders on the C drive. except for, it seems in the user's profile, WIndows, Program files, Program data, Program Files (x86).  The public and default profile has these 3 files in many of  the sub folders but, not the actual users profile.

 

Also regarding the public documents folders, the permissions seem to be changed to Deny Everyone and System is the owner with special permissions.  Special permissions are also assigned to Administrators and Everyone.  I am waiting to change anything on the computer though until getting input from you all.

 

User is not an admin on the machine, though when the infection hit, she did say that when prompted for the admin password she typed it in and immediately new she made a mistake.  She was in a hurry and wasn't thinking.  Wondering if the program did not fully run and there may be a way of determining that and cleaning it up.

 

Word docs don't bring up the ransom note either when opening them.  I would have thought that nothing could be opened.  A little puzzled by this and wonder what the best way to proceed would be.

 

Let me know what else is needed.

 

Thanks.

 

Joe

 



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#2 quietman7

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Posted 22 March 2016 - 04:11 PM

TeslaCrypt 4.0 no longer uses an obvious extension for encrypted filenames...although when first released it used the .mp3 extension. TeslaCrypt 4.0 will leave files (ransom notes) with names like RECOVER+[random].TXT, RECOVER[5-random].TXT, recover_file.txt and _rEcOvEr_[5-random].txt. More information in this BC News article: TeslaCrypt 4.0 Released with Bug Fixes and Stops Adding Extensions.

TeslaCrypt 3.0 will have the .xxx, .ttt, .micro or .mp3 extension appended to the end of the affected filename and leave files (ransom notes) with names like recovery_file_[random].txt, recover_file_[random].txt, Howto_Restore_FILES.TXT, help_recover_instructions+[3-random].txt, Recovery+[5-random].txt, _ReCoVeRy_+[5-random].txt, Recovery_[5-random].txt, _H_e_l_p_RECOVER_INSTRUCTIONS+[3-random].txt, _recovery_+cryptolocker.txt, RECOVERY.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

Currently, there is no way of decrypting TeslaCrypt 4.0 or TeslaCrypt 3.0 .xxx, .ttt, .micro, .mp3 variants unless you pay the ransom 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, micro and .mp3 variants do not have a SharedSecret*PrivateKey so they are not supported by the current version of TeslaViewer. The tool can decrypt TeslaCrypt 3.0 files only if you have the private key acquired from the malware developer after paying the ransom. If infected with any of these extensions, backup all your encrypted files and wait for a possible solution.

There is an ongoing discussion in this topic where you can ask questions and seek further assistance but as noted above there is no solution to fix your encrypted files yet.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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