AMCIS3.DLL is a library file that is responsible for implementing main parasite functions and running its destructive payload. The AMCIS3.DLL file cannot run by itself and therefore needs to be loaded with the help of some executable files. However, certain parasites reconfigures the operating system or installs AMCIS3.DLL as a plugin, so that the system or certain applications automatically load it on startup.
The AMCIS3.DLL file is installed and used by adware
Aureate.Radiate.A.
Sometimes a presence of AMCIS3.DLL 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 AMCIS3.DLL before completely deleting or leaving it in the system.