Dusk is a 2-pole lowpass. Envelope here is a standard downward envelope (you can hear that it opens back up towards the end of the note. Use one of the standard (wah-type, the ones near the top of the list) envelopes and invert the envelope.
@GisserD has a Frazz Dazzler so can probably tell you more about what kind of fuzz it is. I seem to recall it was gated but can’t remember if it does an octavia kind of thing.
Probably one voice with octave routed into distortion then into the filter. Second voice with clean routed into distortion then into the filter.
Dusk can pretty much self-oscillate so has a bigger resonance range than C4 but you can probably get there.