Troj_Dropper.EAT Trojan may be downloaded unknowingly by a user when visiting malicious Web site(s).

Upon execution, it drops a file detected by Trend Micro as TROJ_ILOMO.K. It chooses the file name of the dropped file from a certain list. The said file is dropped in a specific folder.

It creates registry entry(ies) to enable its automatic execution at every system startup. It chooses from a list the registry value data to be created.

It deletes itself after execution.

Technical details can be found at this Trend Micro page.