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All useful values on shared opcode. Not sure where to start

 
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user5594
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PostPosted: Mon Feb 10, 2020 11:19 pm    Post subject: All useful values on shared opcode. Not sure where to start Reply with quote

The singleplayer game I'm making a table for has an opcode that writes to pretty much everything useful. Player/enemy health, ammo, stamina, currency, etc.
Code:
mov [rdx+04],r8

Within a few seconds of unpausing the game, there are a few thousand addresses being written to by the opcode. I've tried finding compares using offsets of RDX, compares of the other registers like r8,r10, etc. but haven't had any luck.
Same goes for "what accesses this address". There are two other opcodes but they have the same problem of accessing thousands of addresses.
Code:
1.   movsd xmm0,[rax]
2.   mov rcx,[rdx+04]

I even tried break and trace (which I have zero experience with) but they basically look exactly the same between player health/ammo. There was one call that I NOP'd without crashing the game but it made everything invincible.

What are my options?
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SnappiBrawn
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PostPosted: Sat Apr 18, 2020 12:21 pm    Post subject: Reply with quote

Have you tried conditional back tracing? It can usually help in situations like these(given that you have the base address). I experienced something similar with borderlands the pre sequel. where scripting a write to cap automatically sent everything and everyone to max. Personally, I made my table using injection copies and a couple comapres(pretty dumb if you ask me but it did the job).
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OldCheatEngineUser
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PostPosted: Sat Apr 18, 2020 7:57 pm    Post subject: Reply with quote

seems like everything is going to msvcrt.memcopy DLL.

see this post, you need a pointer to compare:
https://forum.cheatengine.org/viewtopic.php?p=5740079#5740079

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