MiniBug.exe definition, relationships, removal:

MiniBug.exe is an executable file that is responsible for launching parasites, loading main components of malicious programs and running a destructive payload. It is a significant part of a dangerous parasite, but can also function as a stand-alone threat. DO NOT run this file!
The MiniBug.exe file is installed and used by adware WeatherBug.
The MiniBug.exe file usually runs the same named process. This process silently works in background and performs harmful actions. It remains active while MiniBug.exe is present in the system. Removing the file will immediately terminate a process and prevent it from running later. That is why you have to manually delete the MiniBug.exe file. If you cannot erase it, consider using recommended spyware removers, which will get rid of MiniBug.exe and associated parasites for you.
Sometimes a presence of MiniBug.exe does not indicate that your computer is infected. It can be an essential system file or a file installed by harmless legitimate software and therefore may not pose any threat to your privacy and the system. Although such cases are quite rare, you should thoroughly examine MiniBug.exe before completely deleting or leaving it in the system.