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Resources for learning about Ollydbg in the context of Conquer?


Zedaf

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As the title suggests, if anyone has any good resources for learning more about client editing for conquer, it would be great if you could share them. I don't want to become too reliant on looking around for examples of removing a specific thing, I'd like to be able to learn more about the fundamentals so that I can arrive at the conclusion myself. Just hoping someone can save me a little bit of time by pointing me in the direction of any guides they're aware of which are geared specifically towards modifying game clients etc.

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I just attempted my first ever client modification without any external help and just going off what I've learned so far of assembly and was wondering if anyone could give me some feedback. It seems to have worked but obviously I can't know if there's been any unintended side effects of my actions. I tried to remove the popups that occur when exiting the game and here's what I did:

  • Searched for the URL string http://co.91.com/signout
  • Found 2 results
  • Went to the first result and saw that it pushed the string onto the stack and was followed by a JMP command
  • Followed that JMP command and saw that it lead to a sequence of events that executes something
  • Filled those three events with NOP
  • Repeated with the second result (from step 2)
  • Loaded the client and exited and found that no popup occurred

signout_string.png

execution_before.png

execution_after.png

Edited by Zedaf
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