http://www.coindesk.com/98-5-torrentlocker-victims-refuse-pay-bitcoin-ransom/TorrentLocker (aka Win32 or Filecoder.DI) is a strain of bitcoin ransomware that works by encrypting users' files. Victims are requested to pay up to 4 BTC to decrypt their documents, though this figure can vary.
The report, authored by Marc-Etienne M Léveillé for security firm ESET, found that only 570 out of 39,760 infected systems were given access to decryption software upon paying the full ransom.
"In other words 1.44% of all infected users we have identified have paid the ransom to the cybercriminals," Léveillé writes, adding: "There are also 20 pages showing that bitcoins were sent but access to the decryption software wasn’t given because the full amount wasn’t paid."