Moon2_.dll -

If it is sitting in C:\Program Files\Common Files or a specific game folder (like a custom mod or a game engine component), it is highly likely a safe, functional part of that program.

This free service scans the file against over 70 different antivirus engines and will tell you if any have flagged it as malicious. 2. Check the File Properties Moon2_.dll

The folder where a DLL is stored is usually the biggest giveaway. If it is sitting in C:\Program Files\Common Files