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我想用 C++ 做一个自我更新。我看过这篇关于如何在执行后删除自己的帖子。

如何用 C++ 编写程序，使其在执行后会自行删除？

我希望我的程序在执行后运行这个 powershell 代码：Image

然后运行 ​​newFile.exe。

我已经尝试让它工作但没有运气。如果我执行 CreateProcess() 是否需要延迟 szCmd？

提前致谢 ：）

编辑 ：

我几乎得到了我想要的方式，代码：

void shellMove(std::string source, std::string target) {
STARTUPINFOA si = { 0 };
PROCESS_INFORMATION pi = { 0 };

std::string str = "powershell.exe Move-Item -Path " + source + " -Destination " + target + " -Force; " + target;
LPSTR s = const_cast<char*>(str.c_str());

CreateProcessA(NULL, s, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi);

CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
}

std::string getDirPath() {
char buffer[MAX_PATH] = { 0 };
GetModuleFileNameA(NULL, buffer, MAX_PATH);
return std::string(buffer).substr(0, std::string(buffer).find_last_of("\\"));
}

std::string getFilePath() {
char buffer[MAX_PATH] = { 0 };
GetModuleFileNameA(NULL, buffer, MAX_PATH);
return std::string(buffer);
}

void main() {

std::string fileName = "Test.exe";

shellMove(getDirPath() + "\\" + fileName + "~", getDirPath() + "\\" + fileName);
}

问题是，Test.exe 是一个 c++ 控制台应用程序，这意味着如果我这样做：

std::string str = "powershell.exe Move-Item -Path " + source + " -Destination " + target 
+ " -Force; " + target;

+目标；它使用 Powershell 启动控制台应用程序：/ 我希望它从普通控制台启动，该怎么做？请帮忙谢谢:)

4

1 回答 1

1

可能在不创建外部进程的情况下删除 self exe，这将等待我们的进程终止。

Jonas L的想法

ULONG DeleteSelfWin32()
{
    // MAX_PATH for more simply code here
    WCHAR path[MAX_PATH];

    GetModuleFileNameW(0, path, _countof(path));

    ULONG dwError = GetLastError();
    
    if (dwError == NOERROR)
    {
        HANDLE hFile = CreateFileW(path, DELETE, FILE_SHARE_DELETE, 0, OPEN_EXISTING, 0, 0);

        if (hFile != INVALID_HANDLE_VALUE)
        {
            FILE_RENAME_INFO fri = { TRUE, 0, 2 * sizeof(WCHAR), ':' };
            fri.FileName[1] = '~'; // exist place in FILE_RENAME_INFORMATION due align on HANDLE
            dwError = SetFileInformationByHandle(hFile, FileRenameInfo, &fri, sizeof(fri)) ? NOERROR : GetLastError();

            CloseHandle(hFile);

            if (dwError == NOERROR)
            {
                hFile = CreateFileW(path, DELETE, FILE_SHARE_DELETE, 0, OPEN_EXISTING, 0, 0);

                if (hFile != INVALID_HANDLE_VALUE)
                {
                    FILE_DISPOSITION_INFO fdi = { TRUE };
                    dwError = SetFileInformationByHandle(hFile, FileDispositionInfo, &fdi, sizeof(fdi)) ? NOERROR : GetLastError();
                    CloseHandle(hFile);
                }
                else
                {
                    dwError = GetLastError();
                }
            }
        }
        else
        {
            dwError = GetLastError();
        }
    }

    return dwError;
}

或此代码的 NT 版本

NTSTATUS DeleteSelfNT()
{
    // MAX_PATH for more simply code here
    WCHAR path[MAX_PATH];

    GetModuleFileNameW(0, path, _countof(path));

    if (GetLastError()) return STATUS_NAME_TOO_LONG;

    NTSTATUS status;
    UNICODE_STRING ObjectName;
    OBJECT_ATTRIBUTES oa = { sizeof(oa), 0, &ObjectName };

    if (0 <= (status = RtlDosPathNameToNtPathName_U_WithStatus(path, &ObjectName, 0, 0)))
    {
        HANDLE hFile;
        IO_STATUS_BLOCK iosb;

        if (0 <= NtOpenFile(&hFile, DELETE, &oa, &iosb, FILE_SHARE_DELETE, 0))
        {
            FILE_RENAME_INFORMATION fri = { true, 0, 2*sizeof(WCHAR), ':'};
            fri.FileName[1] = '~'; // exist place in FILE_RENAME_INFORMATION due align on HANDLE
            status = NtSetInformationFile(hFile, &iosb, &fri, sizeof(fri), FileRenameInformation);
            NtClose(hFile);

            if (0 <= status)
            {
                if (0 <= (status = NtOpenFile(&hFile, DELETE, &oa, &iosb, FILE_SHARE_DELETE, 0)))
                {
                    FILE_DISPOSITION_INFORMATION fdi = { true };
                    status = NtSetInformationFile(hFile, &iosb, &fdi, sizeof(fdi), FileDispositionInformation);
                    NtClose(hFile);
                }
            }
        }

        RtlFreeUnicodeString(&ObjectName);
    }

    return status;
}

在 win 7、8.1、10 上测试和工作。但认为这是 ntfs 实现中的错误。

文件是真正被删除，而不是简单地变得不可见。之后的父文件夹也可以删除（如果其中没有更多文件）。通过调用检查-实际上增加了文件大小和NtQueryVolumeInformationFile（文件 id 来自with ） - 以这种方式删除文件后记录变得无效。如果我们将exe复制回来 - SequenceNumber会增加（如果重复使用相同的MftRecordIndex）FileFsFullSizeInformationAvailableAllocationUnitsFSCTL_GET_NTFS_FILE_RECORDNtQueryInformationFileFileInternalInformation

如果不想基于错误并删除购买创建子进程，例如下一个解决方案：

EXTERN_C
NTSYSAPI
VOID
NTAPI
RtlDispatchAPC(
               PAPCFUNC pfnAPC,
               ULONG_PTR dwData,
               PVOID ApcActivationContext
               );

BOOL DeleteSelf()
{
    WCHAR path[MAX_PATH];
    GetModuleFileNameW(0, path, _countof(path));

    if (GetLastError()) return FALSE;

    BOOL fOk = FALSE;

    struct OA_UN : public OBJECT_ATTRIBUTES, UNICODE_STRING {} oa {sizeof(OBJECT_ATTRIBUTES)};

    if (0 <= RtlDosPathNameToNtPathName_U_WithStatus(path, &oa, 0, 0))
    {
        HANDLE hFile;
        IO_STATUS_BLOCK iosb;

        oa.ObjectName = &oa;
        NTSTATUS status = NtOpenFile(&hFile, DELETE, &oa, &iosb, FILE_SHARE_DELETE, 0);
        RtlFreeUnicodeString(&oa);

        if (0 <= status)
        {
            if (GetEnvironmentVariableW(L"ComSpec", path, _countof(path)))
            {
                STARTUPINFOW si = { sizeof(si) };
                PROCESS_INFORMATION pi;
                if (CreateProcessW(path, const_cast<PWSTR>(L"* /C exit\r\n"), 0, 0, 0, CREATE_SUSPENDED|DETACHED_PROCESS, 0, 0, &si, &pi))
                {
                    HANDLE hProcess;
                    if (DuplicateHandle(NtCurrentProcess(), NtCurrentProcess(), pi.hProcess, &hProcess, SYNCHRONIZE, FALSE, 0) &&
                        0 <= ZwQueueApcThread(pi.hThread, (PKNORMAL_ROUTINE)ZwWaitForSingleObject, hProcess, 0, 0))
                    {
                        fOk = DuplicateHandle(NtCurrentProcess(), hFile, pi.hProcess, 
                            &oa.RootDirectory, 0, FALSE, DUPLICATE_SAME_ACCESS|DUPLICATE_CLOSE_SOURCE);

                        hFile = 0;

                        if (fOk)
                        {
                            oa.ObjectName = 0;
                            PVOID pv;

                            fOk = ( pv = VirtualAllocEx(pi.hProcess, 0, sizeof(oa), MEM_COMMIT, PAGE_READWRITE)) &&
                                (oa.ObjectName = reinterpret_cast<OA_UN*>(pv)) &&
                                WriteProcessMemory(pi.hProcess, pv, &oa, sizeof(oa), 0) && 
                                0 <= ZwQueueApcThread(pi.hThread, (PKNORMAL_ROUTINE)RtlDispatchAPC, ZwDeleteFile, pv, INVALID_HANDLE_VALUE);
                                
                        }
                    }
                    ResumeThread(pi.hThread);
                    CloseHandle(pi.hThread);
                    CloseHandle(pi.hProcess);
                }
            }

            if (hFile) NtClose(hFile);
        }
    }

    return fOk;
}

这里我们执行命令cmd.exe ( %ComSpec% ) do exit - " /C exit\r\n"* 命令行（当我们直接传递应用程序名称时 - 系统不需要解析和修改命令行，它可以是常量字符串）。并向 cmd注入 2 个APC调用 - 首先等待我们的进程退出，然后删除文件

于 2021-01-23T03:10:30.837 回答