tl;dr

1. Open a raw socket.
2. Craft the outgoing packets with the byte order of S-PORT, D-PORT, SEQ, ACK reversed.
3. Establish the three way handshake in this fashion.
4. Send “GET_FLAG” to the server.

tl;dr - Volatility + Corrupted file analysis
Full solution of Easy Husky challenge from ISITDTU Quals 2019.

Full solution of Acronym challenge from ISITDTU Quals 2019.
tl;dr - Steganography