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improved mono hook

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This commit is contained in:
Akash Mozumdar 2019-01-20 15:09:14 -05:00
parent 332e5aecaf
commit cea9edab55
1 changed files with 21 additions and 1 deletions
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22
vnrhook/engine/engine.cc
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@ -16570,6 +16570,7 @@ bool InsertMonoHook()
bool found = false; bool found = false;
for (auto addr : Util::SearchMemory(ins, sizeof(ins)/*,PAGE_EXECUTE_READWRITE*/)) for (auto addr : Util::SearchMemory(ins, sizeof(ins)/*,PAGE_EXECUTE_READWRITE*/))
{ {
found = true;
HookParam hp = {}; HookParam hp = {};
hp.address = addr; hp.address = addr;
//hp.module = module; //hp.module = module;
@ -16581,7 +16582,26 @@ bool InsertMonoHook()
ConsoleOutput("vnreng: INSERT Mono"); ConsoleOutput("vnreng: INSERT Mono");
NewHook(hp, "Mono"); NewHook(hp, "Mono");
found = true;
for (int i = 0; i < 75; ++i)
{
if (((*(DWORD*)(addr - i)) | 0xff000000) == 0xffec8b55) // search backward for function entry: first param is MonoString*
{
HookParam hp2 = {};
hp2.address = addr - i;
hp2.type = USING_UNICODE;
hp2.text_fun = [](DWORD esp_base, HookParam*, BYTE, DWORD* data, DWORD* split, DWORD* len)
{
MonoString* string = (MonoString*)argof(1, esp_base);
*data = (DWORD)string->chars;
*len = string->length * 2;
*split = *(DWORD*)(esp_base + 0x28);
};
ConsoleOutput("Textractor: INSERT Mono2");
NewHook(hp2, "Mono2");
break;
}
}
} }
if (!found) ConsoleOutput("vnreng:Mono: pattern not found"); if (!found) ConsoleOutput("vnreng:Mono: pattern not found");
return found; return found;