92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
#include <ntdll.h>
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#include <pe.h>
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#include <msg.h>
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#include <ace.h>
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static void _dll_notification(ULONG reason, const PLDR_DLL_NOTIFICATION_DATA data, void *context) {
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if (reason != 1) { // 1 - attach
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return;
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}
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// context should be set to the target module name, lowercase
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wchar_t *targetModuleName = (wchar_t*)context;
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wchar_t lwModuleName[MAX_PATH];
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wcscpy(lwModuleName, data->Loaded.BaseDllName->Buffer);
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_wcslwr(lwModuleName);
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if (wcscmp(targetModuleName, lwModuleName) == 0) {
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// Replace entry point with a stub
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void *entryPoint = pe_find_entry_point(data->Loaded.DllBase);
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const char ENTRY_POINT_STUB[] = {
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0xB8, 0x01, 0x00, 0x00, 0x00, // mov eax, 1
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0xC3 // ret
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};
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DWORD oldProtect;
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VirtualProtect(entryPoint, sizeof(ENTRY_POINT_STUB), PAGE_EXECUTE_READWRITE, &oldProtect);
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memcpy(entryPoint, ENTRY_POINT_STUB, sizeof(ENTRY_POINT_STUB));
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VirtualProtect(entryPoint, sizeof(ENTRY_POINT_STUB), oldProtect, &oldProtect);
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}
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}
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void ace_fake_driver_files() {
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// They only report presence
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const char *wdDriverPath = "ACE-BASE.sys";
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const char *s32DriverPath = "C:\\windows\\system32\\drivers\\ACE-BASE.sys";
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HANDLE wdDriverFile = CreateFileA(wdDriverPath, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (!wdDriverFile) {
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msg_err_a("Could not create driver file: %s", wdDriverPath);
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}
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// Just in case
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HANDLE s32DriverFile = CreateFileA(s32DriverPath, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (!s32DriverFile) {
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msg_err_a("Could not create driver file: %s", s32DriverPath);
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}
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CloseHandle(wdDriverFile);
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CloseHandle(s32DriverFile);
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}
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HMODULE ace_load_base_module(const char *exeName) {
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wchar_t baseModuleName[MAX_PATH];
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swprintf(baseModuleName, MAX_PATH, L"%sbase.dll", exeName);
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wcslwr(baseModuleName);
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void *cookie;
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LdrRegisterDllNotification(0, &_dll_notification, baseModuleName, &cookie);
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HMODULE baseModule = LoadLibraryW(baseModuleName);
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if (!baseModule) {
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msg_err_w(L"Could not load base module: %ls", baseModuleName);
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}
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// LoadLibraryA is synchronous; the notification function has already finished executing
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LdrUnregisterDllNotification(cookie);
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return baseModule;
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}
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HMODULE ace_load_driver_module() {
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const char *driverModulePath = "AntiCheatExpert/InGame/x64/ACE-DRV64.dll";
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void *cookie;
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LdrRegisterDllNotification(0, &_dll_notification, L"ace-drv64.dll", &cookie);
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HMODULE driverModule = LoadLibraryA(driverModulePath);
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if (!driverModule) {
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msg_err_a("Could not load driver module: %s", driverModulePath);
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}
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// LoadLibraryA is synchronous; the notification function has already finished executing
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LdrUnregisterDllNotification(cookie);
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return driverModule;
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}
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