diff --git a/vnrhook/engine/engine.cc b/vnrhook/engine/engine.cc index 3c4375a..f9f5fac 100644 --- a/vnrhook/engine/engine.cc +++ b/vnrhook/engine/engine.cc @@ -2138,26 +2138,6 @@ bool InsertBGI3Hook() bool InsertBGIHook() { return InsertBGI2Hook() || InsertBGI1Hook(); } -// 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 -bool InsertBaldrHook() -{ - const BYTE ins[] = { 0x90,0xff,0x50,0x3c,0x83,0xc4,0x20,0x8b,0x45,0xec }; - for (auto addr : Util::SearchMemory(ins, sizeof(ins))) - { - HookParam hp = {}; - hp.address = addr; - hp.offset = 4; - hp.type = NO_CONTEXT | USING_STRING | USING_UNICODE; // 0x403 - ConsoleOutput("Textractor: INSERT BALDR"); - NewHook(hp, "BALDR"); - - return true; - } - - ConsoleOutput("Textractor: BALDR failed: could not find instructions"); - return false; -} - /******************************************************************************************** Reallive hook: Process name is reallive.exe or reallive*.exe. @@ -16490,139 +16470,57 @@ bool InsertRenpyHook() return true; } - -/** - * jichi 4/21/2014: Mono (Unity3D) - * See (ok123): http://sakuradite.com/topic/214 - * Pattern: 33DB66390175 - * - * FIXME: This approach won't work before mono is loaded into the memory. - * - * Example: /HWN-8*0:3C@ mono.dll search 33DB66390175 - * - length_offset: 1 - * - module: 1690566707 = 0x64c40033 - * - off: 4294967284 = 0xfffffff4 = -0xc - * - split: 60 = 0x3c - * - type: 1114 = 0x45a - * - * Function starts: - * 1003b818 /$ 55 push ebp - * 1003b819 |. 8bec mov ebp,esp - * 1003b81b |. 51 push ecx - * 1003b81c |. 807d 10 00 cmp byte ptr ss:[ebp+0x10],0x0 - * 1003b820 |. 8b50 08 mov edx,dword ptr ds:[eax+0x8] - * 1003b823 |. 53 push ebx - * 1003b824 |. 8b5d 08 mov ebx,dword ptr ss:[ebp+0x8] - * 1003b827 |. 56 push esi - * 1003b828 |. 8b75 0c mov esi,dword ptr ss:[ebp+0xc] - * 1003b82b |. 57 push edi - * 1003b82c |. 8d78 0c lea edi,dword ptr ds:[eax+0xc] - * 1003b82f |. 897d 08 mov dword ptr ss:[ebp+0x8],edi - * 1003b832 |. 74 44 je short mono.1003b878 - * 1003b834 |. 2bf2 sub esi,edx - * 1003b836 |. 03f1 add esi,ecx - * 1003b838 |. 894d 10 mov dword ptr ss:[ebp+0x10],ecx - * 1003b83b |. 8975 08 mov dword ptr ss:[ebp+0x8],esi - * 1003b83e |. 3bce cmp ecx,esi - * 1003b840 |. 7f 67 jg short mono.1003b8a9 - * 1003b842 |. 8d4c4b 0c lea ecx,dword ptr ds:[ebx+ecx*2+0xc] - * 1003b846 |> 0fb707 /movzx eax,word ptr ds:[edi] - * 1003b849 |. 33db |xor ebx,ebx ; jichi hook here - * 1003b84b |. 66:3901 |cmp word ptr ds:[ecx],ax - * 1003b84e |. 75 16 |jnz short mono.1003b866 - * 1003b850 |. 8bf1 |mov esi,ecx - * 1003b852 |> 43 |/inc ebx - * 1003b853 |. 83c6 02 ||add esi,0x2 - * 1003b856 |. 3bda ||cmp ebx,edx - * 1003b858 |. 74 19 ||je short mono.1003b873 - * 1003b85a |. 66:8b06 ||mov ax,word ptr ds:[esi] - * 1003b85d |. 66:3b045f ||cmp ax,word ptr ds:[edi+ebx*2] - * 1003b861 |.^74 ef |\je short mono.1003b852 - * 1003b863 |. 8b75 08 |mov esi,dword ptr ss:[ebp+0x8] - * 1003b866 |> ff45 10 |inc dword ptr ss:[ebp+0x10] - * 1003b869 |. 83c1 02 |add ecx,0x2 - * 1003b86c |. 3975 10 |cmp dword ptr ss:[ebp+0x10],esi - * 1003b86f |.^7e d5 \jle short mono.1003b846 - */ -bool InsertMonoHook() +void InsertMonoHook(HMODULE mono) { - // 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 - // Instruction pattern: 90FF503C83C4208B45EC - const BYTE ins[] = { - 0x33,0xdb, // 1003b849 |. 33db |xor ebx,ebx ; jichi hook here - 0x66,0x39,0x01, // 1003b84b |. 66:3901 |cmp word ptr ds:[ecx],ax - 0x75 //,0x16 // 1003b84e |. 75 16 |jnz short mono.1003b866 - }; - bool found = false; - for (auto addr : Util::SearchMemory(ins, sizeof(ins)/*,PAGE_EXECUTE_READWRITE*/)) + /* Artikash 2/13/2019: + How to hook Mono/Unity3D: + Find all standard function prologs in memory with write/execute permission: these represent possible JIT compiled functions + Then use Mono APIs to reflect what these functions are, and hook them if they are string member functions + Mono calling convention uses 'this' as first argument on stack + Must be dynamic hook bootstrapped from other mono api or mono_domain_get won't work + */ + trigger_fun_ = [](LPVOID addr, DWORD, DWORD) { - found = true; - HookParam hp = {}; - hp.address = addr; - //hp.module = module; - hp.length_offset = 1; - hp.offset = -0xc; - hp.split = 0x3c; - //hp.type = NO_CONTEXT|USING_SPLIT|MODULE_OFFSET|USING_UNICODE|DATA_INDIRECT; // 0x45a; - hp.type = NO_CONTEXT | USING_SPLIT | USING_UNICODE | DATA_INDIRECT; - - ConsoleOutput("vnreng: INSERT Mono"); - NewHook(hp, "Mono"); - - for (int i = 0; i < 75; ++i) + HMODULE mono = GetModuleHandleW(L"mono"); + static auto getDomain = (MonoDomain*(*)())GetProcAddress(mono, "mono_domain_get"); + static auto getJitInfo = (MonoObject*(*)(MonoDomain*, uintptr_t))GetProcAddress(mono, "mono_jit_info_table_find"); + static auto getName = (char*(*)(uintptr_t))GetProcAddress(mono, "mono_pmip"); + if (!getDomain || !getName || !getJitInfo) goto failed; + static auto domain = getDomain(); + if (!domain) goto failed; + const BYTE prolog[] = { 0x55, 0x8b, 0xec }; + for (auto addr : Util::SearchMemory(prolog, sizeof(prolog), PAGE_EXECUTE_READWRITE)) { - if (((*(DWORD*)(addr - i)) | 0xff000000) == 0xffec8b55) // search backward for function entry: first param is MonoString* + [](uint64_t addr) { - HookParam hp2 = {}; - hp2.address = addr - i; - hp2.type = USING_UNICODE; - hp2.text_fun = [](DWORD esp_base, HookParam*, BYTE, DWORD* data, DWORD* split, DWORD* len) + __try { - 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 (getJitInfo(domain, addr)) + if (char* name = getName(addr)) + if (strstr(name, "string:") && !strstr(name, "string:mem")) + { + HookParam hp = {}; + hp.address = addr; + hp.type = USING_UNICODE; + hp.offset = 4; + hp.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; + }; + NewHook(hp, name); + } + } + __except (EXCEPTION_EXECUTE_HANDLER) {} + }(addr); } - } - if (!found) ConsoleOutput("vnreng:Mono: pattern not found"); - return found; -} - -void InsertMonoHook3() -{ - 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 - // Cheat Engine 'Dissect Mono' feature is very useful in finding Mono hooks. Gives functions to look at in the stacktrace - 0x55, // push ebp - 0x8b, 0xec, // mov ebp,esp - 0x53, // push ebx - 0x57, // push edi - 0x56, // push esi - 0x83, 0xec, 0x0c, // sub esp,0x0c - 0x8b, 0x5d, 0x08, // mov ebx,[ebp+0x08] ; wchar_t* - 0x8b, 0x75, 0x0c, // mov esi,[ebp+0x0c] ; length - 0x8b, 0x7d, 0x10, // mov edi,[ebp+0x10] ; ? - 0x8b, 0xc3, // mov eax,ebx - 0x0b, 0xc6, // or eax,esi - 0x25, 0x03, 0x00, 0x00, 0x00, // and eax,0x03 - 0x85, 0xc0, // test eax,eax - 0x0f, 0x84, XX4, // je ?? - 0x8b, 0xc3, // mov eax,ebx - 0x25, 0x02, 0x00, 0x00, 0x00 // and eax,0x02 + return true; + failed: + ConsoleOutput("Textractor: Mono Dynamic failed"); + return true; }; - for (auto addr : Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE_READWRITE)) - { - HookParam hp = {}; - hp.address = addr; - hp.type = USING_UNICODE | USING_STRING; - hp.offset = 8; - hp.length_offset = 3; - NewHook(hp, "Mono3"); - } + SetTrigger(); } /** jichi 12/26/2014 Mono @@ -16662,9 +16560,7 @@ bool InsertMonoHooks() if (!h) return false; - InsertBaldrHook(); // Artikash 8/28/2018: insert for all mono games: maybe itll work for more than baldr sky zero? - InsertMonoHook(); // Artikash 10/20/2018: dunno why this was removed, works for some stuff so readd - InsertMonoHook3(); + InsertMonoHook(h); // Artikash 10/20/2018: dunno why this was removed, works for some stuff so readd bool ret = false; // mono_unichar2* mono_string_to_utf16 (MonoString *s);