Troj_Fuclip.Of is a Trojan that may arrive as bundled with malware packages as a malware component or as a file downloaded unknowingly by a user when visiting malicious Web sites.

It is a .SYS file used by other malware to hide their malicious routine and processes. It requires its main component in order to perform its intended routines. It is usually injected into running processes.

Technical details can be found at this Trend Micro page.