Hi! I recently found a Redline version trojan virus on my PC, and decided to use Kaspersky Rescue disk to stop it. I found that Various Twine based games are being targeted by what appears to be a worm program depositing the trojan payload. It seems to mainly, but not exclusively (3/4) target the index.html file, which is very easy to find in the program files.
This is a major issue, as the Redline trojan type can key-log, steal saved login info, and various other nefarious things. Please update your servers, as this vulnerability has been patched for years!