Pnig0s1992:算是复习了，最经典的教科书式的Dll注入。
总结一下基本的注入过程，分注入和卸载
注入Dll：
1，OpenProcess获得要注入进程的句柄
2，VirtualAllocEx在远程进程中开辟出一段内存，长度为strlen(dllname)+1;
3，WriteProcessMemory将Dll的名字写入第二步开辟出的内存中。
4，CreateRemoteThread将LoadLibraryA作为线程函数，参数为Dll的名称，创建新线程
5，CloseHandle关闭线程句柄
卸载Dll：
1，CreateRemoteThread将GetModuleHandle注入到远程进程中，参数为被注入的Dll名
2，GetExitCodeThread将线程退出的退出码作为Dll模块的句柄值。
3，CloseHandle关闭线程句柄
3，CreateRemoteThread将FreeLibraryA注入到远程进程中，参数为第二步获得的句柄值。
4，WaitForSingleObject等待对象句柄返回
5，CloseHandle关闭线程及进程句柄。
- //Code By Pnig0s1992
//Date:2012,3,13
#include <stdio.h>
#include <Windows.h>
#include <TlHelp32.h>
DWORD getProcessHandle(LPCTSTR lpProcessName)//根据进程名查找进程PID
{
DWORD dwRet = 0;
HANDLE hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
if(hSnapShot == INVALID_HANDLE_VALUE)
{
printf("\n获得进程快照失败%d",GetLastError());
return dwRet;
}
PROCESSENTRY32 pe32;//声明进程入口对象
pe32.dwSize = sizeof(PROCESSENTRY32);//填充进程入口对象大小
Process32First(hSnapShot,&pe32);//遍历进程列表
do
{
if(!lstrcmp(pe32.szExeFile,lpProcessName))//查找指定进程名的PID
{
dwRet = pe32.th32ProcessID;
break;
}
} while (Process32Next(hSnapShot,&pe32));
CloseHandle(hSnapShot);
return dwRet;//返回
}
INT main(INT argc,CHAR * argv[])
{
DWORD dwPid = getProcessHandle((LPCTSTR)argv[1]);
LPCSTR lpDllName = "EvilDll.dll";
HANDLE hProcess = OpenProcess(PROCESS_VM_OPERATION|PROCESS_VM_WRITE,FALSE,dwPid);
if(hProcess == NULL)
{
printf("\n获取进程句柄错误%d",GetLastError());
return -1;
}
DWORD dwSize = strlen(lpDllName)+1;
DWORD dwHasWrite;
LPVOID lpRemoteBuf = VirtualAllocEx(hProcess,NULL,dwSize,MEM_COMMIT,PAGE_READWRITE);
if(WriteProcessMemory(hProcess,lpRemoteBuf,lpDllName,dwSize,&dwHasWrite))
{
if(dwHasWrite != dwSize)
{
VirtualFreeEx(hProcess,lpRemoteBuf,dwSize,MEM_COMMIT);
CloseHandle(hProcess);
return -1;
}
}else
{
printf("\n写入远程进程内存空间出错%d。",GetLastError());
CloseHandle(hProcess);
return -1;
}
DWORD dwNewThreadId;
LPVOID lpLoadDll = LoadLibraryA;
HANDLE hNewRemoteThread = CreateRemoteThread(hProcess,NULL,0,(LPTHREAD_START_ROUTINE)lpLoadDll,lpRemoteBuf,0,&dwNewThreadId);
if(hNewRemoteThread == NULL)
{
printf("\n建立远程线程失败%d",GetLastError());
CloseHandle(hProcess);
return -1;
}
WaitForSingleObject(hNewRemoteThread,INFINITE);
CloseHandle(hNewRemoteThread);
//准备卸载之前注入的Dll
DWORD dwHandle,dwID;
LPVOID pFunc = GetModuleHandleA;//获得在远程线程中被注入的Dll的句柄
HANDLE hThread = CreateRemoteThread(hProcess,NULL,0,(LPTHREAD_START_ROUTINE)pFunc,lpRemoteBuf,0,&dwID);
WaitForSingleObject(hThread,INFINITE);
GetExitCodeThread(hThread,&dwHandle);//线程的结束码即为Dll模块儿的句柄
CloseHandle(hThread);
pFunc = FreeLibrary;
hThread = CreateRemoteThread(hThread,NULL,0,(LPTHREAD_START_ROUTINE)pFunc,(LPVOID)dwHandle,0,&dwID); //将FreeLibraryA注入到远程线程中去卸载Dll
WaitForSingleObject(hThread,INFINITE);
CloseHandle(hThread);
CloseHandle(hProcess);
return 0;
}
