This sound was programmed on the Juno-106 with the oscillators off and the VCF resonance all the way up, which puts the instrument into self-resonance as was discovered in the article Eerie Pseudo Oscillator Microtrack. Right around 0:42 I turned on the sawtooth wave and manipulated the LFO, then at 0:57 I turned it back off again.

Arpeggiated Filter Self Resonance