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| #define WIN32_LEAN_AND_MEAN | |
| #include <Windows.h> | |
| #include <TlHelp32.h> | |
| #include <iostream> | |
| #include <regex> | |
| HANDLE g_process_handle; | |
| auto get_module(const char* modName, DWORD proc_id) { | |
| HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE | TH32CS_SNAPMODULE32, proc_id); | |
| if (hSnap != INVALID_HANDLE_VALUE) { | |
| MODULEENTRY32 modEntry; | |
| modEntry.dwSize = sizeof(modEntry); | |
| if (Module32First(hSnap, &modEntry)) { | |
| do { | |
| if (!strcmp(modEntry.szModule, modName)) { | |
| CloseHandle(hSnap); | |
| return modEntry; | |
| } | |
| } while (Module32Next(hSnap, &modEntry)); | |
| } | |
| } | |
| return MODULEENTRY32(); | |
| } | |
| template<typename T> T RPM(SIZE_T address) { | |
| T buffer; ReadProcessMemory(g_process_handle, (void*)address, &buffer, sizeof(T), nullptr); | |
| return buffer; | |
| } | |
| void str_replace_all(std::string& subject, const std::string& search, const std::string& replace) { | |
| size_t pos = 0; | |
| while ((pos = subject.find(search, pos)) != std::string::npos) { | |
| subject.replace(pos, search.length(), replace); | |
| pos += replace.length(); | |
| } | |
| } | |
| //now accepts ida-style, single and double question marks, lower case and uppercase | |
| uintptr_t find_pattern(const MODULEENTRY32& module, const std::string& str, std::string ida, int offset, int extra, bool relative = true) { | |
| ida.insert(0, " "); | |
| std::transform(ida.begin(), ida.end(), ida.begin(), tolower); | |
| str_replace_all(ida, " ??", " ?"); | |
| str_replace_all(ida, " ?", " ??"); | |
| str_replace_all(ida, " ", ""); | |
| std::string pattern; | |
| for (unsigned int i = 0; i < ida.size(); i += 2) { | |
| std::string word = ida.substr(i, 2); | |
| if (word == "??") pattern += "."; | |
| else pattern += (char)strtol(word.c_str(), NULL, 16); | |
| } | |
| uintptr_t address; | |
| std::smatch sm; | |
| std::regex_search(str, sm, std::regex(pattern)); | |
| if (sm.size() == 0) return 0x0; | |
| else address = sm.position(0); | |
| address += (uintptr_t)module.modBaseAddr + offset; | |
| address = RPM<uint32_t>(address) + extra; | |
| return relative ? address - (uintptr_t)module.modBaseAddr : address; | |
| } | |
| int main() { | |
| auto hwnd = FindWindow(NULL, "Counter-Strike: Global Offensive"); | |
| DWORD proc_id; GetWindowThreadProcessId(hwnd, &proc_id); | |
| g_process_handle = OpenProcess(PROCESS_VM_READ, false, proc_id); | |
| auto client = get_module("client_panorama.dll", proc_id); | |
| std::string bytes(client.modBaseSize, ' '); | |
| ReadProcessMemory(g_process_handle, (void*)client.modBaseAddr, (void*)bytes.data(), client.modBaseSize, nullptr); | |
| printf("dwEntityList: 0x%X\n", find_pattern(client, bytes, "BB ? ? ? ? 83 FF 01 0F 8C ? ? ? ? 3B F8", 0x1, 0x0)); | |
| printf("dwViewMatrix: 0x%X\n", find_pattern(client, bytes, "0F 10 05 ? ? ? ? 8D 85 ? ? ? ? B9", 0x3, 0xB0)); | |
| bytes.~basic_string(); | |
| system("pause"); | |
| } |
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what happens when the pattern contains a byte that represents a special regex character ($, ). :-)