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The One Mono Hook To Rule Them All has arrived
This commit is contained in:
Akash Mozumdar
parent
f1ab7cd208
commit
510acdeca3
@ -2138,26 +2138,6 @@ bool InsertBGI3Hook()
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bool InsertBGIHook()
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{ return InsertBGI2Hook() || InsertBGI1Hook(); }
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// Artikash 8/28/2018: reimplement baldr sky zero hook. see ok123's post https://web.archive.org/web/20140815231753/http://9gal.com/read.php?tid=411756
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bool InsertBaldrHook()
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{
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const BYTE ins[] = { 0x90,0xff,0x50,0x3c,0x83,0xc4,0x20,0x8b,0x45,0xec };
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for (auto addr : Util::SearchMemory(ins, sizeof(ins)))
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{
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HookParam hp = {};
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hp.address = addr;
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hp.offset = 4;
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hp.type = NO_CONTEXT | USING_STRING | USING_UNICODE; // 0x403
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ConsoleOutput("Textractor: INSERT BALDR");
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NewHook(hp, "BALDR");
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return true;
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}
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ConsoleOutput("Textractor: BALDR failed: could not find instructions");
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return false;
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}
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/********************************************************************************************
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Reallive hook:
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Process name is reallive.exe or reallive*.exe.
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@ -16490,139 +16470,57 @@ bool InsertRenpyHook()
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return true;
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}
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/**
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* jichi 4/21/2014: Mono (Unity3D)
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* See (ok123): http://sakuradite.com/topic/214
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* Pattern: 33DB66390175
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*
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* FIXME: This approach won't work before mono is loaded into the memory.
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*
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* Example: /HWN-8*0:3C@ mono.dll search 33DB66390175
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* - length_offset: 1
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* - module: 1690566707 = 0x64c40033
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* - off: 4294967284 = 0xfffffff4 = -0xc
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* - split: 60 = 0x3c
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* - type: 1114 = 0x45a
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*
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* Function starts:
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* 1003b818 /$ 55 push ebp
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* 1003b819 |. 8bec mov ebp,esp
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* 1003b81b |. 51 push ecx
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* 1003b81c |. 807d 10 00 cmp byte ptr ss:[ebp+0x10],0x0
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* 1003b820 |. 8b50 08 mov edx,dword ptr ds:[eax+0x8]
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* 1003b823 |. 53 push ebx
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* 1003b824 |. 8b5d 08 mov ebx,dword ptr ss:[ebp+0x8]
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* 1003b827 |. 56 push esi
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* 1003b828 |. 8b75 0c mov esi,dword ptr ss:[ebp+0xc]
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* 1003b82b |. 57 push edi
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* 1003b82c |. 8d78 0c lea edi,dword ptr ds:[eax+0xc]
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* 1003b82f |. 897d 08 mov dword ptr ss:[ebp+0x8],edi
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* 1003b832 |. 74 44 je short mono.1003b878
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* 1003b834 |. 2bf2 sub esi,edx
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* 1003b836 |. 03f1 add esi,ecx
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* 1003b838 |. 894d 10 mov dword ptr ss:[ebp+0x10],ecx
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* 1003b83b |. 8975 08 mov dword ptr ss:[ebp+0x8],esi
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* 1003b83e |. 3bce cmp ecx,esi
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* 1003b840 |. 7f 67 jg short mono.1003b8a9
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* 1003b842 |. 8d4c4b 0c lea ecx,dword ptr ds:[ebx+ecx*2+0xc]
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* 1003b846 |> 0fb707 /movzx eax,word ptr ds:[edi]
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* 1003b849 |. 33db |xor ebx,ebx ; jichi hook here
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* 1003b84b |. 66:3901 |cmp word ptr ds:[ecx],ax
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* 1003b84e |. 75 16 |jnz short mono.1003b866
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* 1003b850 |. 8bf1 |mov esi,ecx
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* 1003b852 |> 43 |/inc ebx
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* 1003b853 |. 83c6 02 ||add esi,0x2
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* 1003b856 |. 3bda ||cmp ebx,edx
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* 1003b858 |. 74 19 ||je short mono.1003b873
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* 1003b85a |. 66:8b06 ||mov ax,word ptr ds:[esi]
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* 1003b85d |. 66:3b045f ||cmp ax,word ptr ds:[edi+ebx*2]
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* 1003b861 |.^74 ef |\je short mono.1003b852
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* 1003b863 |. 8b75 08 |mov esi,dword ptr ss:[ebp+0x8]
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* 1003b866 |> ff45 10 |inc dword ptr ss:[ebp+0x10]
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* 1003b869 |. 83c1 02 |add ecx,0x2
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* 1003b86c |. 3975 10 |cmp dword ptr ss:[ebp+0x10],esi
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* 1003b86f |.^7e d5 \jle short mono.1003b846
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void InsertMonoHook(HMODULE mono)
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{
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/* Artikash 2/13/2019:
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How to hook Mono/Unity3D:
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Find all standard function prologs in memory with write/execute permission: these represent possible JIT compiled functions
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Then use Mono APIs to reflect what these functions are, and hook them if they are string member functions
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Mono calling convention uses 'this' as first argument on stack
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Must be dynamic hook bootstrapped from other mono api or mono_domain_get won't work
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*/
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bool InsertMonoHook()
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trigger_fun_ = [](LPVOID addr, DWORD, DWORD)
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{
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// TO FUTURE ME: If you're looking for a new mono hook, try searching for this assembly and breaking into it: 8d 44 48 10 0f b7 4d ?? 66 89 08
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// Instruction pattern: 90FF503C83C4208B45EC
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const BYTE ins[] = {
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0x33,0xdb, // 1003b849 |. 33db |xor ebx,ebx ; jichi hook here
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0x66,0x39,0x01, // 1003b84b |. 66:3901 |cmp word ptr ds:[ecx],ax
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0x75 //,0x16 // 1003b84e |. 75 16 |jnz short mono.1003b866
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};
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bool found = false;
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for (auto addr : Util::SearchMemory(ins, sizeof(ins)/*,PAGE_EXECUTE_READWRITE*/))
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HMODULE mono = GetModuleHandleW(L"mono");
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static auto getDomain = (MonoDomain*(*)())GetProcAddress(mono, "mono_domain_get");
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static auto getJitInfo = (MonoObject*(*)(MonoDomain*, uintptr_t))GetProcAddress(mono, "mono_jit_info_table_find");
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static auto getName = (char*(*)(uintptr_t))GetProcAddress(mono, "mono_pmip");
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if (!getDomain || !getName || !getJitInfo) goto failed;
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static auto domain = getDomain();
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if (!domain) goto failed;
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const BYTE prolog[] = { 0x55, 0x8b, 0xec };
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for (auto addr : Util::SearchMemory(prolog, sizeof(prolog), PAGE_EXECUTE_READWRITE))
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{
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[](uint64_t addr)
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{
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__try
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{
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if (getJitInfo(domain, addr))
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if (char* name = getName(addr))
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if (strstr(name, "string:") && !strstr(name, "string:mem"))
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{
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found = true;
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HookParam hp = {};
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hp.address = addr;
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//hp.module = module;
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hp.length_offset = 1;
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hp.offset = -0xc;
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hp.split = 0x3c;
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//hp.type = NO_CONTEXT|USING_SPLIT|MODULE_OFFSET|USING_UNICODE|DATA_INDIRECT; // 0x45a;
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hp.type = NO_CONTEXT | USING_SPLIT | USING_UNICODE | DATA_INDIRECT;
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ConsoleOutput("vnreng: INSERT Mono");
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NewHook(hp, "Mono");
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for (int i = 0; i < 75; ++i)
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{
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if (((*(DWORD*)(addr - i)) | 0xff000000) == 0xffec8b55) // search backward for function entry: first param is MonoString*
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{
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HookParam hp2 = {};
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hp2.address = addr - i;
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hp2.type = USING_UNICODE;
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hp2.text_fun = [](DWORD esp_base, HookParam*, BYTE, DWORD* data, DWORD* split, DWORD* len)
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hp.type = USING_UNICODE;
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hp.offset = 4;
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hp.text_fun = [](DWORD esp_base, HookParam*, BYTE, DWORD* data, DWORD* split, DWORD* len)
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{
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MonoString* string = (MonoString*)argof(1, esp_base);
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*data = (DWORD)string->chars;
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*len = string->length * 2;
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*split = *(DWORD*)(esp_base + 0x28);
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};
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ConsoleOutput("Textractor: INSERT Mono2");
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NewHook(hp2, "Mono2");
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break;
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NewHook(hp, name);
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}
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}
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__except (EXCEPTION_EXECUTE_HANDLER) {}
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}(addr);
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}
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if (!found) ConsoleOutput("vnreng:Mono: pattern not found");
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return found;
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}
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void InsertMonoHook3()
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{
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const BYTE bytes[] = { // Characteristic pattern of System.String.CharCopy in Venus Blood Lagoon https://vndb.org/v23125 and レイジングループ
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// Cheat Engine 'Dissect Mono' feature is very useful in finding Mono hooks. Gives functions to look at in the stacktrace
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0x55, // push ebp
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0x8b, 0xec, // mov ebp,esp
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0x53, // push ebx
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0x57, // push edi
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0x56, // push esi
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0x83, 0xec, 0x0c, // sub esp,0x0c
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0x8b, 0x5d, 0x08, // mov ebx,[ebp+0x08] ; wchar_t*
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0x8b, 0x75, 0x0c, // mov esi,[ebp+0x0c] ; length
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0x8b, 0x7d, 0x10, // mov edi,[ebp+0x10] ; ?
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0x8b, 0xc3, // mov eax,ebx
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0x0b, 0xc6, // or eax,esi
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0x25, 0x03, 0x00, 0x00, 0x00, // and eax,0x03
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0x85, 0xc0, // test eax,eax
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0x0f, 0x84, XX4, // je ??
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0x8b, 0xc3, // mov eax,ebx
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0x25, 0x02, 0x00, 0x00, 0x00 // and eax,0x02
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return true;
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failed:
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ConsoleOutput("Textractor: Mono Dynamic failed");
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return true;
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};
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for (auto addr : Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE_READWRITE))
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{
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HookParam hp = {};
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hp.address = addr;
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hp.type = USING_UNICODE | USING_STRING;
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hp.offset = 8;
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hp.length_offset = 3;
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NewHook(hp, "Mono3");
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}
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SetTrigger();
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}
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/** jichi 12/26/2014 Mono
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@ -16662,9 +16560,7 @@ bool InsertMonoHooks()
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if (!h)
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return false;
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InsertBaldrHook(); // Artikash 8/28/2018: insert for all mono games: maybe itll work for more than baldr sky zero?
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InsertMonoHook(); // Artikash 10/20/2018: dunno why this was removed, works for some stuff so readd
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InsertMonoHook3();
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InsertMonoHook(h); // Artikash 10/20/2018: dunno why this was removed, works for some stuff so readd
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bool ret = false;
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// mono_unichar2* mono_string_to_utf16 (MonoString *s);
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