通过注入的方式禁用windows的Ctrl+alt+del。

• 方式一：挂起winlogon.exe进程

缺点：如果开机挂起过早，可能导致系统无法进入。关机的时候如果没有恢复winlogon.exe会导致系统无法关机（卡界面）。

• 方式二：注入winlogon.exe

目前仅仅针对64位程序有效

#include <windows.h>
#include <TlHelp32.h>
#include <winnt.h>
#include <iostream>


void RaiseToDebug(){
    HANDLE hToken;
    TOKEN_PRIVILEGES tkp;
    if(OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)){
        LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &tkp.Privileges[0].Luid);
        tkp.PrivilegeCount = 1;
        tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
        AdjustTokenPrivileges(hToken, FALSE, &tkp, sizeof(tkp), NULL, NULL);
        CloseHandle(hToken);
    }
}

bool Start(){
    auto module  = GetModuleHandleA("rpcrt4.dll");
    auto func = GetProcAddress(module, "RpcServerTestCancel");
    if(func){
        auto snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
        PROCESSENTRY32 pe32;
        pe32.dwSize = sizeof(PROCESSENTRY32);
        if(Process32First(snapshot, &pe32)){
            do{
                if(!strcmp(pe32.szExeFile, "winlogon.exe")){
                    auto hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pe32.th32ProcessID);
                    if(hProcess){
                        DWORD oldpp;
                        if(VirtualProtectEx(hProcess,(void *)func, 0x100,PAGE_EXECUTE_READWRITE ,&oldpp)){
                            unsigned char buf[] = {0x33,0xc0,0xc3};
                            WriteProcessMemory(hProcess, (void *)func,buf, sizeof(buf), NULL);
                        }
                        CloseHandle(hProcess);
                    }
                }
            }while(Process32Next(snapshot, &pe32));
        }


    }
    return true;
}

bool Stop(){
    auto module  = GetModuleHandleA("rpcrt4.dll");
    auto func = GetProcAddress(module, "RpcServerTestCancel");
    if(func){
        auto snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
        PROCESSENTRY32 pe32;
        pe32.dwSize = sizeof(PROCESSENTRY32);
        if(Process32First(snapshot, &pe32)){
            do{
                if(!strcmp(pe32.szExeFile, "winlogon.exe")){
                    auto hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pe32.th32ProcessID);
                    if(hProcess){
                        DWORD oldpp;
                        if(VirtualProtectEx(hProcess,(void *)func, 0x100,PAGE_EXECUTE_READWRITE ,&oldpp)){
                            WriteProcessMemory(hProcess, (void *)func,(void *)func, 3, NULL);
                        }
                        CloseHandle(hProcess);
                    }
                }
            }while(Process32Next(snapshot, &pe32));
        }


    }
    return true;
}

int main(){
    LoadLibraryA("rpcrt4.dll");
    RaiseToDebug();
	//禁用ctrl+alt+del
    Start();
    getchar();
	//启用ctrl+alt+del
    Stop();
    return 1;
}