Hi all ... i have some Problem whit this Shellcode when i Crypt Some Unicode Chars


Assembly language source code :
***************************************
00000000  push ebp
00000001  mov ebp,esp
00000003  push ebx
00000004  push esi
00000005  push edi
00000006  mov eax,dword[ss:ebp+0xc]
00000009  test eax,eax
0000000b  je 0x53
0000000d  mov eax,dword[ss:ebp+0x14]
00000010  test eax,eax
00000012  je 0x53
00000014  mov ecx,dword[ss:ebp+0xc]
00000017  shl ecx,0x1
00000019  mov edx,dword[ss:ebp+0x8]
0000001c  add edx,ecx
0000001e  neg ecx
00000020  mov ebx,dword[ss:ebp+0x14]
00000023  shl ebx,0x1
00000025  mov eax,dword[ss:ebp+0x10]
00000028  add eax,ebx
0000002a  mov dword[ss:ebp+0x10],eax
0000002d  neg ebx
0000002f  mov dword[ss:ebp+0x14],ebx
00000032  mov eax,dword[edx+ecx*1]
00000035  add ebx,dword[ss:ebp+0x10]
00000038  xor al,byte[ebx]
0000003a  sub ebx,dword[ss:ebp+0x10]
0000003d  add ebx,0x2
00000043  jne 0x48
00000045  mov ebx,dword[ss:ebp+0x14]
00000048  mov dword[edx+ecx*1],eax
0000004b  add ecx,0x2
00000051  jne 0x32
00000053  xor eax,eax
00000055  pop edi
00000056  pop esi
00000057  pop ebx
00000058  mov esp,ebp
0000005a  pop ebp
0000005b  ret 0x10

I think the Problem Is xor al,byte[ebx] so i changed the OPCode

32 03  xor al,byte[ebx]

To

33 03 xor eax Dword(EBX)

now seems it can crypt more unicode chars but there is still some problem

Anyone can help me ? Thanks !!