Question Rust — Dumping Decryption Routines and Function Patterns

[byte_corvus]

The Wall: Moving Beyond Static Offsets

Anyone else tired of their dumper hitting a wall because the game updated its decryption logic? We've all been there—you've got your offsets pouring in, but the moment you try to read a networked property, it's just garbled junk. In the current state of Rust reversing, if you aren't dumping the actual decryption routines, you're basically running a legacy setup.

Implementing Decryption Logic

To move from basic offset dumping to decryption routine extraction, you have to pivot from data-mining to pattern-matching executable code segments.

1. Trace the Access: Use a tool like ReClass.NET or IDA to find where the game reads a specific value (like player health or positions).
2. Reverse the Routine: Once you locate the instruction touching that memory, trace it back to the decryption stub. You'll usually see a chain of XOR, ADD, or bit-shifting operations—that is the technical core you need to extract.
3. Sigging the Stub: Don't just signature the offset itself. Create a robust signature for the prologue of that decryption function. Your dumper needs to scan the code section for these bytes to find the entry point dynamically.

Spoiler: Technical Risks & EAC

Rust sits behind Easy Anti-Cheat (EAC). If you're running an external dumper, don't just open handles and scan memory like it's the old days. EAC monitors for unusual access patterns in the .text section. Use a clean kernel driver or an established bypass to avoid getting flagged during the dump process.

Has anyone here managed to fully automate the pattern-finding for these decryption stubs, or are we still doing the manual heavy lifting in IDA every time the game patches?

// Conceptual sigscan for a decryption prologue
uintptr_t decrypt_ptr = find_pattern("48 8B 05 ? ? ? ? 48 31 C0");

Drop your thoughts below—have fun reversing.