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deal with Encrypted Value which opcodes are Shared

 
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Meiyoh
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PostPosted: Fri Jul 03, 2020 4:12 am    Post subject: deal with Encrypted Value which opcodes are Shared Reply with quote
I want to deal with 4 bytes encrypted value and find the real value behind some animations i want to do. Problem is all codes writing to the address are shared between enemies and character.

How can i deal with this ?
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Csimbi
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Joined: 14 Jul 2007
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PostPosted: Fri Jul 03, 2020 5:44 am    Post subject: Reply with quote
You need to find a way to distinguish friendlies from baddies and perform a check before you execute your own code - we call this a player check.

e.g.
Code:
cmp byte ptr [rax+10],0
jne short baddie // It is not the player?
mov dword ptr [rax+50],(float)100 // Set health to max
jmp short ret
baddie:
mov dword ptr [rax+50],(float)0 // Set health to 0
ret:
jmp back
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++METHOS
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PostPosted: Fri Jul 03, 2020 2:45 pm    Post subject: Reply with quote
Many ways to filter out unwanted addresses.

https://forum.cheatengine.org/viewtopic.php?p=5667414#5667414

If you are familiar with using dissect data structure, you can oftentimes find a value within that structure that is being accessed by an instruction that is exclusive to that address, allowing you to insert your injection in a less-obvious location. In such a case, you would just apply the appropriate offset in order to alter the important data.
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