How the hell is this synth made?

[Bareinversion]

So I heard this synth and I can't figure it out.
It's at the drop of the song below, the one that comes in almost instantly at the drop, just after the first beat of the supersaw.
https://soundcloud.com/letsbefriendsuk/ ... er-vip-mix

A similar kind of sound can be heard in Rob Swire's drumstep mix of Witchcraft (at the drop again)
https://soundcloud.com/pendulum/witchcr ... s-drumstep

Any ideas quite how it's made or could be recreated? I'm not trying to steal their sounds, I just love the sound and am curious how it's made.

Cheers