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Ransom ware Cryptosystem rsa-4096


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3 replies to this topic

#1 natesemipro

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Posted 25 February 2016 - 04:18 PM

I have issues.  A client downloaded a .zip and attatched was ransome ware.

Where do I go next?

 

I am sorry if I posted this in the wrong place but I was a bit confused on how things work here.

 

Thank you.

Natesemipro

 

Mod Edit:  Removed FRST log, moved from MRL to Gen Security - Hamluis.


Edited by hamluis, 25 February 2016 - 05:54 PM.


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#2 quietman7

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Posted 25 February 2016 - 06:49 PM


Are there any file extensions appended to your files...such as .ecc, .ezz, .exx, .zzz, .xyz, .aaa, .abc, .ccc, .vvv, .xxx, .ttt, .micro, .mp3, .encrypted, .locked, .crypto, _crypt, .crinf, .r5a, .XTBL, .YTBL, .crypt, .R16M01D05, .pzdc, .good, .LOL!, .OMG!, .RDM, .RRK, .encryptedRSA, .crjoker, .EnCiPhErEd, .LeChiffre, .keybtc@inbox_com, .0x0, .bleep, .1999, .vault, .HA3, .toxcrypt, .magic, .ENC, .locky, _sq.<filename>, .k2p, .Sanction, .krypted, .SPORT, .cwgoqia, .73i87A, .trun, .crysis, .xrtn, .SUPERCRYPT, .CTBL, .CTB2, or 6-7 length extension consisting of random characters such as .uogltic, .rpyxhhm, .mtrsxox, .phszfud?

Did you find any ransom note? These infections are created to alert victims that their data has been encrypted and demand a ransom payment. Check your documents folder for an image the malware typically uses for the background note. Check the C:\ProgramData (or C:\Documents and Settings\All Users\Application Data) for a randomly named .html, .txt, .png, .bmp, .url file.

These are some examples of ransom notes:
HELP_DECRYPT.TXT, HELP_YOUR_FILES.TXT, HELP_TO_DECRYPT_YOUR_FILES.txt, RECOVERY_KEY.txt
ABOUT FILES!.txt, Read.txt, ReadMe.txt, Coin.Locker.txt, _Locky_recover_instructions.txt, ATTENTION.RTF
HELP_RESTORE_FILES.txt, HELP_RECOVER_FILES.txt, HELP_TO_SAVE_FILES.txt, DecryptAllFiles.txt, 
DECRYPT_INSTRUCTIONS.TXT, How_To_Recover_Files.txt, How_To_Restore_Files.txt, ReadDecryptFilesHere.txt
Help_Decrypt.txt, YOUR_FILES.HTML, YOUR_FILES.url, encryptor_raas_readme_liesmich.txt, WHAT IS SQ_.txt
DECRYPT_INSTRUCTION.TXT, HOW_TO_DECRYPT_FILES.TXT, IMPORTANT READ ME.txt, README1.txt...README10.txt
_secret_code.txt, DECRYPT_ReadMe.TXT, DecryptAllFiles_.txt, AllFilesAreLocked_.bmp, BLEEPEDFILES.TXT
FILESAREGONE.TXT, IAMREADYTOPAY.TXT, HELLOTHERE.TXT, READTHISNOW!!!.TXT, IHAVEYOURSECRET.KEY
SECRET.KEY, SECRETIDHERE.KEY, HELP_DECYPRT_YOUR_FILES.HTML, README_DECRYPT_UMBRE_ID_[victim_id].txt
help_decrypt_your_files.html, RECOVERY_FILES.txt, RECOVERY_FILE.TXT, RECOVERY_FILE_[random].txt
Howto_RESTORE_FILES_.txt, Howto_Restore_FILES.TXT, howto_recover_file_.txt, HELP_TO_SAVE_FILES.txt
how_recover+[random].txt, _how_recover_.txt, restore_files_.txt, recover_file_[random].txt
recover_files_[random].txt, recovery_file_[random].txt, help_recover_instructions+[random].txt
_H_e_l_p_RECOVER_INSTRUCTIONS+[3-characters].txt, help recover files.txt, Recovery+[random].txt

Note: The [random] represents random characters which some ransom notes names may include.
Once we have identified the specific ransomware you are dealing with, I can direct you to the appropriate support topic for further assistance and possible decryption of encrypted files.
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#3 Demonslay335

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Posted 25 February 2016 - 06:54 PM

According to his FRST log, I saw some files that were appended with .mp3 on the desktop and in Documents (ex. C:\Users\[username]\Documents\Innercept - Proof of Ins..pdf.mp3). I'm afraid this user was hit with TeslaCrypt 3.0.


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.


#4 quietman7

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Posted 25 February 2016 - 06:59 PM

Based on the information provided by Demonslay335...you are dealing with a newer variant of TeslaCrypt 3.0 ransomware which will have the .xxx, .ttt, .micro or .mp3 extension appended to the end of the filename as described in this news article. More information about the .mp3 variant is described here.

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 3.0 .xxx, .ttt, .micro, or .mp3 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, micro and .mp3 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 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.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.

Thanks
The BC Staff
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