Looks like one of those locked Halion Sonic SE patches which can’t be edited.
Quickest would be to add Halion’s Auto Filter on the program bus and setup its built in LFO for modulation.
Other option is to use Cubase’s Auto LFO midi plugin on you channel’s midi insert.
Halion’s quick control 2 uses controller nr. 71 as a default. Setting Auto LFO to modulate CC71 should do the trick.