windows下ZwQuerySystemInformation隐藏进程,给出c++代码

以下是一个简单的 C++ 代码示例，演示了如何使用 `ZwQuerySystemInformation` 函数来遍历系统中的进程并隐藏指定进程。

注意：这仅是一个示例代码，仅供学习和参考。在实际使用中，请确保您已经理解代码的含义，并且不要滥用这个功能。

#include <Windows.h>
#include <iostream>

typedef NTSTATUS(WINAPI* pfnZwQuerySystemInformation)(ULONG, PVOID, ULONG, PULONG);

int main()
{
    // 要隐藏的进程名
    const wchar_t* processName = L"Demo.exe";

    // 加载 ntdll.dll 并获取 ZwQuerySystemInformation 函数地址
    HMODULE ntdll = LoadLibrary(L"ntdll.dll");
    pfnZwQuerySystemInformation ZwQuerySystemInformation = (pfnZwQuerySystemInformation)GetProcAddress(ntdll, "ZwQuerySystemInformation");

    if (ZwQuerySystemInformation == nullptr)
    {
        std::cerr << "Failed to get ZwQuerySystemInformation address." << std::endl;
        return 1;
    }

    // 获取系统进程信息
    ULONG bufferSize = 0;
    ZwQuerySystemInformation(SystemProcessInformation, nullptr, 0, &bufferSize);

    PVOID buffer = VirtualAlloc(nullptr, bufferSize, MEM_COMMIT, PAGE_READWRITE);
    if (buffer == nullptr)
    {
        std::cerr << "Failed to allocate memory." << std::endl;
        return 1;
    }

    ULONG returnLength;
    NTSTATUS status = ZwQuerySystemInformation(SystemProcessInformation, buffer, bufferSize, &returnLength);

    if (status != STATUS_SUCCESS)
    {
        std::cerr << "Failed to get system process information." << std::endl;
        VirtualFree(buffer, 0, MEM_RELEASE);
        return 1;
    }

    // 遍历进程信息并隐藏指定进程
    PSYSTEM_PROCESS_INFORMATION current = (PSYSTEM_PROCESS_INFORMATION)buffer;
    PSYSTEM_PROCESS_INFORMATION previous = nullptr;

    while (current != nullptr)
    {
        if (wcscmp(current->ImageName.Buffer, processName) == 0)
        {
            // 隐藏进程
            if (previous != nullptr)
            {
                previous->NextEntryOffset += current->NextEntryOffset;
            }
            else
            {
                // 如果是第一个进程，则需要更新 ProcessInfoListHead 指针
                ((PSYSTEM_PROCESS_INFORMATION)buffer)->NextEntryOffset = current->NextEntryOffset;
            }
        }

        // 移动到下一个进程
        previous = current;
        current = (PSYSTEM_PROCESS_INFORMATION)((PUCHAR)current + current->NextEntryOffset);
    }

    // 释放内存并退出
    VirtualFree(buffer, 0, MEM_RELEASE);
    return 0;
}