Trojan:W32/Agent.AFB is a trojan with rootkit functionality. It is usually associated with Adware programs.
Trojan:W32/Agent.AFB may drop .DLL , .SYS or .EXE files as its component. It typically drops its components in the following locations on the infected machine:
The dropped .SYS file is a driver that is use to hide some registry entries. This is done by hooking several APIs related to registry operations.