Put this in your .bashrc/.profile:
rawcat() { sh -c 'trap "stty icanon" SIGINT; stty -icanon; cat $@;' _ $@; }
rawnc() { sh -c 'trap "stty icanon" SIGINT; stty -icanon; nc $@;' _ $@; }
The trap is used to set cat/nc to icanon state when it is Ctrl+C'd, otherwise it will be stuck in -icanon even if you run the normal /bin/cat, or any program that reads stdin like cat, like hexdump.
When using cat > file
stty would complain, but still works as expected for some unknown reason
see man stty