A new variant of the TeslaCrypt ransomware has been released that contains some minor changes. The version number is still 3.0 but the ransom notes have been renamed and the file extension for encrypted files is now. Unfortunately there is still no way to decrypt this latest version of TeslaCrypt. The new ransom note filenames are now in the format _H_e_l_p_RECOVER_INSTRUCTIONS+[3-characters].png, H_E_l.p_recover_instructions+[ 3-char characters].txt, and HTML HTML.
Source: https://www.bleepingcomputer.com/news/security/new-teslacrypt-variant-now-uses-the-mp3-extension/