shellcode: db 0x4b,0xf7,0x13,0x59,0xcc,0x8c,0x63,0x5e,0x9f,0x8d,0x99,0x9f,0x1f,0xa4,0x3b,0x6e,0xc6,0x36,0x23
define shellcode as an array of bytes and initialize it to 0x4b,0xf7,0x13,0x59,0xcc,0x8c,0x63,0x5e,0x9f,0x8d,0x99,0x9f,0x1f,0xa4,0x3b,0x6e,0xc6,0x36,0x23