Use chains of pointers that validate each other. If one pointer’s target is patched, another pointer reverts the patch.
Let’s walk through a fictional but realistic example to cement the concept.
Target: "TimeTracker Pro 1.0" (30-day trial, focus-based nag screen) pointer focus patched crack
Protection: Every time the main window gets focus, the program reads a pointer pExpiryCheck at address 0x005B12F0. If days < 0, it jumps to 0x004A1000 (nag screen).
Cracker’s steps:
Result: The program still thinks it's expired internally, but the pointer to the nag function now points to a harmless ret. The user sees no interruption.
If you are a developer worried about "pointer focus patched crack" attacks, here’s how to protect your software: Use chains of pointers that validate each other
Store function pointers encrypted in memory. Decrypt them only at the exact moment of calling, then re-encrypt.
A reverse engineer (using IDA Pro, x64dbg, or Ghidra) will: Result: The program still thinks it's expired internally,