Please follow this link to writeup : [volatilevirus](https://volatilevirus.home.blog/2019/04/07/dr-evil-midnightsun-quals-2019/)

tl;dr - Evil Bits(IPv4 Header) + Scapy

Original writeup (https://volatilevirus.home.blog/2019/04/07/dr-evil-midnightsun-quals-2019/).