Troj/Boxed-H is a DoS flooder Trojan.
Troj/Boxed-H copies itself with the filename RCHOST.EXE to either the system subfolder of the Windows folder or to the folder Application Data\Microsoft\Internet Explorer. Troj/Boxed-H then sets an entry in the registry at the following location so as to run itself on system startup:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
.norton
If Troj/Boxed-H finds an entry already at this location in the registry it attempts to copy itself to the file it finds there.
Troj/Boxed-H runs continuously in the background sending packets to addresses as part of a DoS attack.