How to Patch (IL Edit) of Assembles loaded from Resource

[cracki]

Thanks a bunch for the tip!

My target is a .NET Core app without plugin support. What's the best way to inject LibHarmony Patcher?
One of examples in the docs that works on my case, involve npm, which seems odd for my case. Any other methods you know of?

[Levis]

Originally Posted by cracki

Thanks a bunch for the tip!

My target is a .NET Core app without plugin support. What's the best way to inject LibHarmony Patcher?
One of examples in the docs that works on my case, involve npm, which seems odd for my case. Any other methods you know of?

Yes, all you need is to find a DLL or something that being called right before your target method, from the main executable, or any 3rd parties DLL,... then inject some small pieces of code to Reflective load your DLL into AppDomain, then you can do whatever you want, in this case, you're able to perform IL patch before the target method being called.
Remember that if your target is .NET Core, your hooking DLL must be .NET Core, too. Exact Runtime and exact version. For e.g, Target is .NET 6, then your code must be .NET 6, and so on.

If using function name is hard (when it's obfuscated), then you can try to resolve method using Method token. There is no big difference.

[cracki]

Originally Posted by Levis

Yes, all you need is to find a DLL or something that being called right before your target method, from the main executable, or any 3rd parties DLL,... then inject some small pieces of code to Reflective load your DLL into AppDomain, then you can do whatever you want, in this case, you're able to perform IL patch before the target method being called.
Remember that if your target is .NET Core, your hooking DLL must be .NET Core, too. Exact Runtime and exact version. For e.g, Target is .NET 6, then your code must be .NET 6, and so on.

If using function name is hard (when it's obfuscated), then you can try to resolve method using Method token. There is no big difference.

Thanks a lot for your guidance! The approach you suggested seems quite practical for my case

One other question:
How i can "resolve method using Method token" by HarmonyLib? is this possible?

Thanks again for the valuable insight!