Saiko Labs
A routine XORs the flag with a constant. Undo it.
Decompiled check. Flag bytes XOR'd with 0x11:
unsigned char enc[] = { 0x62, 0x70, 0x78, 0x7a, 0x7e, 0x6a, 0x61, 0x74, 0x74, 0x7d, 0x4e, 0x65, 0x79, 0x74, 0x4e, 0x61, 0x70, 0x72, 0x7a, 0x74, 0x65, 0x6c };