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Peeszdyetc
How do I cheat?
![]() Reputation: 0
Joined: 27 Jun 2023
Posts: 4
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 Posted: Tue Jun 27, 2023 2:53 pm Post subject: [SOLVED] CE Auto Assemble inserts unexpected code |
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AA (Auto Assemble) script I have:
| Code: | [Enable]
label(back)
mb_warband.exe+B0863:
jmp 007BDB6D
back:
call mb_warband.exe+B00D0
007BDB6D:
jmp back
[Disable]
mb_warband.exe+B0863:
call mb_warband.exe+B00D0 |
Memory before AA execution
| Code: | mb_warband.exe+B0860 - 50 - push eax
mb_warband.exe+B0861 - 8B CB - mov ecx,ebx
mb_warband.exe+B0863 - E8 68F8FFFF - call mb_warband.exe+B00D0
mb_warband.exe+B0868 - 8B E8 - mov ebp,eax
mb_warband.exe+B086A - 8B 3D A0F38500 - mov edi,[mb_warband.exe+45F3A0]
mb_warband.exe+B0870 - 8B 44 24 2C - mov eax,[esp+2C]
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Memory after AA exaction
| Code: | mb_warband.exe+B0860 - 50 - push eax
mb_warband.exe+B0861 - 8B CB - mov ecx,ebx
mb_warband.exe+B0863 - E9 05D33000 - jmp mb_warband.exe+3BDB6D
mb_warband.exe+B0868 - E8 63F8FFFF - call mb_warband.exe+B00D0
mb_warband.exe+B086D - F3 85 00 - repe test [eax],eax
mb_warband.exe+B0870 - 8B 44 24 2C - mov eax,[esp+2C] |
What a hell is 'repe test' that i wasn't expected to see after script execution at all? Because of it game crashes when reaches this memory area. When I remove this unexpected bonus added by AA manually via Memory Viewer and fill with nop's - everything works good.
Nop'd version:
| Code: | mb_warband.exe+B0860 - 50 - push eax
mb_warband.exe+B0861 - 8B CB - mov ecx,ebx
mb_warband.exe+B0863 - E9 05D33000 - jmp mb_warband.exe+3BDB6D
mb_warband.exe+B0868 - E8 63F8FFFF - call mb_warband.exe+B00D0
mb_warband.exe+B086D - 90 - nop
mb_warband.exe+B086E - 90 - nop
mb_warband.exe+B086F - 90 - nop
mb_warband.exe+B0870 - 8B 44 24 2C - mov eax,[esp+2C] |
So, how to prevent AA from doing this?
P.S. AA not even remove this 'repe test' when I disable this script.
Last edited by Peeszdyetc on Sat Jul 01, 2023 3:51 pm; edited 1 time in total |
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Dark Byte
Site Admin
 Reputation: 470
Joined: 09 May 2003
Posts: 25812
Location: The netherlands
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| Posted: Tue Jun 27, 2023 4:45 pm Post subject: |
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that is because after you overwrite call mb_warband.exe+B00D0 with jmp 007BDB6D you write a call mb_warband.exe+B00D0
which overwrites the 5 bytes at
| Code: |
mb_warband.exe+B0868 - 8B E8 - mov ebp,eax
mb_warband.exe+B086A - 8B 3D A0F38500 - mov edi,[mb_warband.exe+45F3A0]
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and as you can see, F3 85 00 will be left
What might work better:
| Code: |
[Enable]
label(back)
mb_warband.exe+B0863:
jmp 007BDB6D
back:
007BDB6D:
call mb_warband.exe+B00D0
jmp back
[Disable]
mb_warband.exe+B0863:
call mb_warband.exe+B00D0
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It might also help to look into the alloc command in case 007BDB6D is non-executable
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Peeszdyetc
How do I cheat?
![]() Reputation: 0
Joined: 27 Jun 2023
Posts: 4
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| Posted: Sat Jul 01, 2023 2:47 pm Post subject: |
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| Dark Byte wrote: | that is because after you overwrite call mb_warband.exe+B00D0 with jmp 007BDB6D you write a call mb_warband.exe+B00D0
which overwrites the 5 bytes at
| Code: |
mb_warband.exe+B0868 - 8B E8 - mov ebp,eax
mb_warband.exe+B086A - 8B 3D A0F38500 - mov edi,[mb_warband.exe+45F3A0]
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and as you can see, F3 85 00 will be left
What might work better:
| Code: |
[Enable]
label(back)
mb_warband.exe+B0863:
jmp 007BDB6D
back:
007BDB6D:
call mb_warband.exe+B00D0
jmp back
[Disable]
mb_warband.exe+B0863:
call mb_warband.exe+B00D0
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It might also help to look into the alloc command in case 007BDB6D is non-executable |
Thank you! This clears up things.
Solved.
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