TorrentLocker is a separate strain of crypto ransomware from CryptoLocker or CryptoWall, but its creators appear to have taken quite a few notes from the older variants. The malware uses a different kind of encryption scheme and the underlying code is not similar to CryptoWall s. The creators seem to have made a key mistake that enables them to recover encrypted files in some circumstances. Researchers don t expect that to change much due to a lack of distinguishing features, but they say the malware is nowhere near as widespread a threat.
Source: https://threatpost.com/key-flaw-enables-recovery-of-files-encrypted-by-torrentlocker/108210/