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  1. #1
    Jack
    Jack is offline
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    DN Packet-Encrpytion

    I tried to find out what encryption DN is using for the packets but no success.

    My Result was:

    -The most encrypted Packets in the Town doesn't change, even if you restart your Client
    -You can send the encrypted Packets(but you can't edit them)
    -Probably it is a Encryption without a SessionID
    -It isn't a simple XOR Encryption

    If someone has more Infos, feel free to share it here.

  2. #2
    bool_
    bool_ is offline
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    encipher:
    Code:
    009096D0 - 51                    - push ecx
    009096D1 - 8B D0                 - mov edx,eax
    009096D3 - 53                    - push ebx
    009096D4 - 8B D8                 - mov ebx,eax
    009096D6 - C1 EA 03              - shr edx,03
    009096D9 - A8 07                 - test al,07
    009096DB - 89 5C 24 04           - mov [esp+04],ebx
    009096DF - 74 03                 - je 009096E4
    009096E1 - 83 C2 01              - add edx,01
    009096E4 - 8B C8                 - mov ecx,eax
    009096E6 - 83 E1 01              - and ecx,01
    009096E9 - 83 C1 01              - add ecx,01
    009096EC - 85 D2                 - test edx,edx
    009096EE - 0F8E C0000000         - jng 009097B4
    009096F4 - 25 FF000000           - and eax,000000FF
    009096F9 - C1 E0 04              - shl eax,04
    009096FC - 69 C9 B979379E        - imul ecx,ecx,9E3779B9
    00909702 - 55                    - push ebp
    00909703 - 56                    - push esi
    00909704 - 8B 74 24 14           - mov esi,[esp+14]
    00909708 - 57                    - push edi
    00909709 - 8D 7C 30 04           - lea edi,[eax+esi+04]
    0090970D - 8B 74 24 1C           - mov esi,[esp+1C]
    00909711 - 89 4C 24 18           - mov [esp+18],ecx
    00909715 - 89 54 24 1C           - mov [esp+1C],edx
    00909719 - 8D A4 24 00000000     - lea esp,[esp+00000000]
    00909720 - 33 C0                 - xor eax,eax
    00909722 - 83 FB 08              - cmp ebx,08
    00909725 - 72 63                 - jb 0090978A
    00909727 - 39 44 24 18           - cmp [esp+18],eax
    0090972B - 8B 0E                 - mov ecx,[esi]
    0090972D - 8B 56 04              - mov edx,[esi+04]
    00909730 - 74 4A                 - je 0090977C
    00909732 - 8B DA                 - mov ebx,edx
    00909734 - C1 EB 05              - shr ebx,05
    00909737 - 8B EA                 - mov ebp,edx
    00909739 - C1 E5 04              - shl ebp,04
    0090973C - 33 DD                 - xor ebx,ebp
    0090973E - 03 DA                 - add ebx,edx
    00909740 - 8B E8                 - mov ebp,eax
    00909742 - 83 E5 03              - and ebp,03
    00909745 - 8B 2C AF              - mov ebp,[edi+ebp*4]
    00909748 - 03 E8                 - add ebp,eax
    0090974A - 33 DD                 - xor ebx,ebp
    0090974C - 03 CB                 - add ecx,ebx
    0090974E - 8B D9                 - mov ebx,ecx
    00909750 - C1 EB 05              - shr ebx,05
    00909753 - 8B E9                 - mov ebp,ecx
    00909755 - C1 E5 04              - shl ebp,04
    00909758 - 33 DD                 - xor ebx,ebp
    0090975A - 2D 4786C861           - sub eax,61C88647
    0090975F - 8B E8                 - mov ebp,eax
    00909761 - C1 ED 0B              - shr ebp,0B
    00909764 - 83 E5 03              - and ebp,03
    00909767 - 8B 2C AF              - mov ebp,[edi+ebp*4]
    0090976A - 03 D9                 - add ebx,ecx
    0090976C - 03 E8                 - add ebp,eax
    0090976E - 33 DD                 - xor ebx,ebp
    00909770 - 03 D3                 - add edx,ebx
    00909772 - 3B 44 24 18           - cmp eax,[esp+18]
    00909776 - 75 BA                 - jne 00909732
    00909778 - 8B 5C 24 10           - mov ebx,[esp+10]
    0090977C - 83 EB 08              - sub ebx,08
    0090977F - 89 0E                 - mov [esi],ecx
    00909781 - 89 56 04              - mov [esi+04],edx
    00909784 - 89 5C 24 10           - mov [esp+10],ebx
    00909788 - EB 19                 - jmp 009097A3
    0090978A - 85 DB                 - test ebx,ebx
    0090978C - 76 15                 - jna 009097A3
    0090978E - 8B CF                 - mov ecx,edi
    00909790 - 8B C6                 - mov eax,esi
    00909792 - 2B CE                 - sub ecx,esi
    00909794 - 8B EB                 - mov ebp,ebx
    00909796 - 8A 14 01              - mov dl,[ecx+eax]
    00909799 - 30 10                 - xor [eax],dl
    0090979B - 83 C0 01              - add eax,01
    0090979E - 83 ED 01              - sub ebp,01
    009097A1 - 75 F3                 - jne 00909796
    009097A3 - 83 C6 08              - add esi,08
    009097A6 - 83 6C 24 1C 01        - sub dword ptr [esp+1C],01
    009097AB - 0F85 6FFFFFFF         - jne 00909720
    009097B1 - 5F                    - pop edi
    009097B2 - 5E                    - pop esi
    009097B3 - 5D                    - pop ebp
    009097B4 - 5B                    - pop ebx
    009097B5 - 59                    - pop ecx
    009097B6 - C2 0800               - ret 0008

    decipher:
    Code:
    009097C0 - 83 EC 08              - sub esp,08
    009097C3 - 8B C8                 - mov ecx,eax
    009097C5 - 53                    - push ebx
    009097C6 - 8B D8                 - mov ebx,eax
    009097C8 - C1 E9 03              - shr ecx,03
    009097CB - A8 07                 - test al,07
    009097CD - 89 5C 24 04           - mov [esp+04],ebx
    009097D1 - 74 03                 - je 009097D6
    009097D3 - 83 C1 01              - add ecx,01
    009097D6 - 8B D0                 - mov edx,eax
    009097D8 - 83 E2 01              - and edx,01
    009097DB - 83 C2 01              - add edx,01
    009097DE - 85 C9                 - test ecx,ecx
    009097E0 - 0F8E BC000000         - jng 009098A2
    009097E6 - 55                    - push ebp
    009097E7 - 25 FF000000           - and eax,000000FF
    009097EC - 56                    - push esi
    009097ED - 8B 74 24 18           - mov esi,[esp+18]
    009097F1 - C1 E0 04              - shl eax,04
    009097F4 - 57                    - push edi
    009097F5 - 8D 7C 30 04           - lea edi,[eax+esi+04]
    009097F9 - 8B 74 24 20           - mov esi,[esp+20]
    009097FD - 8B C2                 - mov eax,edx
    009097FF - 69 C0 B979379E        - imul eax,eax,9E3779B9
    00909805 - 89 44 24 14           - mov [esp+14],eax
    00909809 - 89 4C 24 1C           - mov [esp+1C],ecx
    0090980D - EB 05                 - jmp 00909814
    0090980F - 90                    - nop 
    00909810 - 8B 44 24 14           - mov eax,[esp+14]
    00909814 - 83 FB 08              - cmp ebx,08
    00909817 - 72 5F                 - jb 00909878
    00909819 - 85 C0                 - test eax,eax
    0090981B - 8B 16                 - mov edx,[esi]
    0090981D - 8B 4E 04              - mov ecx,[esi+04]
    00909820 - 74 48                 - je 0090986A
    00909822 - 8B DA                 - mov ebx,edx
    00909824 - C1 EB 05              - shr ebx,05
    00909827 - 8B EA                 - mov ebp,edx
    00909829 - C1 E5 04              - shl ebp,04
    0090982C - 33 DD                 - xor ebx,ebp
    0090982E - 8B E8                 - mov ebp,eax
    00909830 - C1 ED 0B              - shr ebp,0B
    00909833 - 83 E5 03              - and ebp,03
    00909836 - 8B 2C AF              - mov ebp,[edi+ebp*4]
    00909839 - 03 E8                 - add ebp,eax
    0090983B - 03 DA                 - add ebx,edx
    0090983D - 33 DD                 - xor ebx,ebp
    0090983F - 2B CB                 - sub ecx,ebx
    00909841 - 8B D9                 - mov ebx,ecx
    00909843 - C1 EB 05              - shr ebx,05
    00909846 - 8B E9                 - mov ebp,ecx
    00909848 - C1 E5 04              - shl ebp,04
    0090984B - 33 DD                 - xor ebx,ebp
    0090984D - 05 4786C861           - add eax,61C88647
    00909852 - 8B E8                 - mov ebp,eax
    00909854 - 83 E5 03              - and ebp,03
    00909857 - 8B 2C AF              - mov ebp,[edi+ebp*4]
    0090985A - 03 D9                 - add ebx,ecx
    0090985C - 03 E8                 - add ebp,eax
    0090985E - 33 DD                 - xor ebx,ebp
    00909860 - 2B D3                 - sub edx,ebx
    00909862 - 85 C0                 - test eax,eax
    00909864 - 75 BC                 - jne 00909822
    00909866 - 8B 5C 24 10           - mov ebx,[esp+10]
    0090986A - 83 EB 08              - sub ebx,08
    0090986D - 89 16                 - mov [esi],edx
    0090986F - 89 4E 04              - mov [esi+04],ecx
    00909872 - 89 5C 24 10           - mov [esp+10],ebx
    00909876 - EB 19                 - jmp 00909891
    00909878 - 85 DB                 - test ebx,ebx
    0090987A - 76 15                 - jna 00909891
    0090987C - 8B CF                 - mov ecx,edi
    0090987E - 8B C6                 - mov eax,esi
    00909880 - 2B CE                 - sub ecx,esi
    00909882 - 8B EB                 - mov ebp,ebx
    00909884 - 8A 14 01              - mov dl,[ecx+eax]
    00909887 - 30 10                 - xor [eax],dl
    00909889 - 83 C0 01              - add eax,01
    0090988C - 83 ED 01              - sub ebp,01
    0090988F - 75 F3                 - jne 00909884
    00909891 - 83 C6 08              - add esi,08
    00909894 - 83 6C 24 1C 01        - sub dword ptr [esp+1C],01
    00909899 - 0F85 71FFFFFF         - jne 00909810
    0090989F - 5F                    - pop edi
    009098A0 - 5E                    - pop esi
    009098A1 - 5D                    - pop ebp
    009098A2 - 5B                    - pop ebx
    009098A3 - 83 C4 08              - add esp,08
    009098A6 - C2 0800               - ret 0008
    it's XTEA, you can find out the keys yourself.

  3. The Following User Says Thank You to bool_ For This Useful Post:


  4. #3
    xkhen0017
    xkhen0017 is offline
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    i think every packets in DN are changed when you did something up. Like for example you scanned packets then walked. So much there is need of decryption. >.<

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