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The History And Development Of TeslaCrypt Ransomware   TeslaCrypt is a ransomware program that encrypts files that targets all Windows versions including Windows Vista, Windows XP and Windows 7. The program was released for the first time towards the end of February 2015. TeslaCrypt is a virus that infects your computer and looks for data files to encode.      As soon as all the files that contain data on your computer have been affected, an application will be displayed with information on how to retrieve your files. The instructions will include the link to a TOR encryption service site. This site will give you information about the current ransom amount and the number of files that have been encrypted, and the method you can use to make payment so that your files are released. KD76 The ransom usually starts at $500. It is paid in Bitcoins. There is a different Bitcoin address for each victim.      Once TeslaCrypt is installed on your computer, it will create a randomly labeled executable within the %AppData% folder. The executable starts and scans your computer's drive letters for files that can be encrypted. When it discovers a supported data file the file is encrypted and adds an extension to the file's name. This name is determined by the version of the program that has affected your computer. With the release of new variants of TeslaCrypt, the program uses different file extensions for the encrypted files. Currently, TeslaCrypt uses the following extensions: .ccc, .abc, .aaa, .zzz, .xyz, .exx, .ezz and .ecc. There is a chance that you can make use of the TeslaDecoder tool to decrypt your encrypted files for free of charge. It is dependent on the version of TeslaCrypt is infected.      It is important to note that TeslaCrypt will search all drive letters on your computer to find files to encode. It includes network shares, DropBox mappings, and removable drives. It only targets network share data files if the network share is mapped as a drive letters on your computer. If you haven't yet mapped the network share as a drive letter the ransomware won't be able to secure the files on that network share. After scanning your computer, the ransomware will delete all Shadow Volume Copies. This is to prevent you from restoring the affected files. The version of the ransomware is identified by the title of the application that appears after encryption.      How your computer gets infected with TeslaCrypt      TeslaCrypt is infected by computers when a user visits an untrusted website that runs an exploit kit and whose computer has outdated programs. Hackers hack websites to distribute the malware. An exploit kit is a special software program that they install. This tool exploits weaknesses in your computer's programs. Some of the programs that have vulnerabilities are commonly exploited include Windows, Acrobat Reader, Adobe Flash and Java. Once the exploit tool has successfully exploited the vulnerabilities in your computer it will automatically install and launch TeslaCrypt.      It is important to ensure that Windows and other programs are all up-to date. This will help you avoid possible vulnerabilities that could lead to the infecting of your computer with TeslaCrypt.      This ransomware was the first to actively attack data files that are that are used by PC video games. It targets game files of games like Steam, World of Tanks and League of Legends. Diablo, Fallout 3 Skyrim, Dragon Age Dragon Age, Call of Duty and RPG Maker are just a handful of the games it targets. However, it has not been determined if game targets mean increased profits for the developers of this malware.      Versions of TeslaCrypt, and the file extensions associated with it.      TeslaCrypt is frequently updated to include new encryption methods and file extensions. The first version encrypts files with the extension .ecc. The encrypted files, in this case are not associated with the data files. The TeslaDecoder can also be used to retrieve the original encryption key. If the decryption keys were zeroed out, and the key was found to be partial in key.dat, it is possible. You can also find the Tesla request sent directly to the server along with the keys for decryption.      There is another version with encrypted file extensions of .ecc and .ezz. It is impossible to recover the original decryption key without having the ransomware's authors' private key if the decryption was zeroed out. The encrypted files are not associated with the data file. The Tesla request can be sent to the server with the decryption key.      The original encryption keys for the versions with extensions file names.ezz or.exx cannot be recovered without the author's private key. If the secret key for decryption was zeroed out, it won't be possible to retrieve the decryption keys. Files encrypted with the extension.exx can be joined with data files. Decryption key can also be obtained via the Tesla request to the server.      The version that is encrypted with extension of files .ccc, .abc, .aaa, .zzz and .xyz does not use data files and the encryption key is not stored on your computer. It is only decrypted if the victim captures the key while it was being sent to the server. Decryption key can be retrieved from Tesla request to the server. This is not possible for TeslaCrypt versions before v2.1.0.      The release of TeslaCrypt 4.0      Recently, the developers released TeslaCrypt 4.0 in the month of March. A quick review shows that the new version has fixed a flaw that corrupted files earlier than 4GB. It also comes with new ransom notes and does not require encryption of files. The absence of an extension makes it difficult for users to discover the existence of TeslaCryot and what has happened to their files. The ransom notes can be used to establish pathways for victims. There are little established ways to decrypt files that have no extension without a purchased decryption key or Tesla's private key. If the user captures the key while it was being transmitted to a server the files could be decrypted. 

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