[+] challenge ff fc 5d d5 00 00 5d c4 02 63 a8 c0 ff fc 5d d6
[+] reply     72 61 60 45 bf bb 0d 01 f0 17 9e b1 87 a0 fd 32
opcode 7 -> flag=0x00 payload=44 6f 6e 65 0a 00 (b'Done\n\x00')
[.] jump returned 0x00000000 (0)
jump 0x01870000: returned 0x00000000 (0) payload=00 00 00 00