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Refactor ace.c

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This commit is contained in:
mkrsym1 2023-08-02 01:42:04 +03:00
parent 2612ad2212
commit eb38894de5
1 changed files with 52 additions and 60 deletions
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112
game_payload/src/ace.c
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@ -9,83 +9,75 @@ static void _dll_notification(ULONG reason, const PLDR_DLL_NOTIFICATION_DATA dat
return;
}
// context should be set to the target module name, lowercase
// context should be set to the target module name
wchar_t *targetModuleName = (wchar_t*)context;
wchar_t lwModuleName[MAX_PATH];
wcscpy(lwModuleName, data->Loaded.BaseDllName->Buffer);
_wcslwr(lwModuleName);
if (wcscmp(targetModuleName, lwModuleName) == 0) {
// Replace entry point with a stub
void *entryPoint = pe_find_entry_point(data->Loaded.DllBase);
const char ENTRY_POINT_STUB[] = {
0xB8, 0x01, 0x00, 0x00, 0x00, // mov eax, 1
0xC3 // ret
};
DWORD oldProtect;
VirtualProtect(entryPoint, sizeof(ENTRY_POINT_STUB), PAGE_EXECUTE_READWRITE, &oldProtect);
memcpy(entryPoint, ENTRY_POINT_STUB, sizeof(ENTRY_POINT_STUB));
VirtualProtect(entryPoint, sizeof(ENTRY_POINT_STUB), oldProtect, &oldProtect);
if (wcsicmp(targetModuleName, data->Loaded.BaseDllName->Buffer) != 0) {
return;
}
// Replace entry point with a stub
void *entryPoint = pe_find_entry_point(data->Loaded.DllBase);
const char ENTRY_POINT_STUB[] = {
0xB8, 0x01, 0x00, 0x00, 0x00, // mov eax, 1
0xC3 // ret
};
DWORD oldProtect;
VirtualProtect(entryPoint, sizeof(ENTRY_POINT_STUB), PAGE_EXECUTE_READWRITE, &oldProtect);
memcpy(entryPoint, ENTRY_POINT_STUB, sizeof(ENTRY_POINT_STUB));
VirtualProtect(entryPoint, sizeof(ENTRY_POINT_STUB), oldProtect, &oldProtect);
}
static void _create_driver_file(const char *path) {
// They only report presence
HANDLE file = CreateFileA(path, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE) {
msg_err_a("Could not create driver file: %s", file);
}
CloseHandle(file);
}
void ace_fake_driver_files() {
// They only report presence
const char *wdDriverPath = "ACE-BASE.sys";
const char *s32DriverPath = "C:\\windows\\system32\\drivers\\ACE-BASE.sys";
HANDLE wdDriverFile = CreateFileA(wdDriverPath, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (!wdDriverFile) {
msg_err_a("Could not create driver file: %s", wdDriverPath);
}
_create_driver_file("ACE-BASE.sys");
// Just in case
HANDLE s32DriverFile = CreateFileA(s32DriverPath, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (!s32DriverFile) {
msg_err_a("Could not create driver file: %s", s32DriverPath);
_create_driver_file("C:\\windows\\system32\\drivers\\ACE-BASE.sys");
}
HMODULE _load_module_patched(wchar_t *path) {
// Get filename from the path
wchar_t *name = wcsrchr(path, '\\');
name = name ? name + 1 : path;
void *cookie;
LdrRegisterDllNotification(0, &_dll_notification, name, &cookie);
HMODULE module = LoadLibraryW(path);
if (!module) {
msg_err_w(L"Could not load module: %ls", path);
}
CloseHandle(wdDriverFile);
CloseHandle(s32DriverFile);
// LoadLibraryW is synchronous; the notification function has already finished executing
LdrUnregisterDllNotification(cookie);
return module;
}
HMODULE ace_load_base_module(const char *exeName) {
wchar_t baseModuleName[MAX_PATH];
swprintf(baseModuleName, MAX_PATH, L"%sbase.dll", exeName);
swprintf(baseModuleName, MAX_PATH, L"%sBase.dll", exeName);
wcslwr(baseModuleName);
void *cookie;
LdrRegisterDllNotification(0, &_dll_notification, baseModuleName, &cookie);
HMODULE baseModule = LoadLibraryW(baseModuleName);
if (!baseModule) {
msg_err_w(L"Could not load base module: %ls", baseModuleName);
}
// LoadLibraryA is synchronous; the notification function has already finished executing
LdrUnregisterDllNotification(cookie);
return baseModule;
return _load_module_patched(baseModuleName);
}
HMODULE ace_load_driver_module() {
const char *driverModulePath = "AntiCheatExpert/InGame/x64/ACE-DRV64.dll";
void *cookie;
LdrRegisterDllNotification(0, &_dll_notification, L"ace-drv64.dll", &cookie);
HMODULE driverModule = LoadLibraryA(driverModulePath);
if (!driverModule) {
msg_err_a("Could not load driver module: %s", driverModulePath);
}
// LoadLibraryA is synchronous; the notification function has already finished executing
LdrUnregisterDllNotification(cookie);
return driverModule;
return _load_module_patched(L"AntiCheatExpert\\InGame\\x64\\ACE-DRV64.dll");
}