在内存中运行可执行程序(转)

       在内存中运行可执行程序，好处是可以给程序加壳，加密源程序，静态反汇编无法获得PE输入节，但是因为运行后仍然是独立的进程，所以没办法防止远程线程注入，挂接API钩子。

typedef IMAGE_SECTION_HEADER ( * PIMAGE_SECTION_HEADERS)[ 1 ];   
  
 //  计算对齐后的大小    
 unsigned  long  GetAlignedSize(unsigned  long  Origin, unsigned  long  Alignment)   
  {   
     return  (Origin  +  Alignment  -   1 )  /  Alignment  *  Alignment;   
}    
  
 //  计算加载pe并对齐需要占用多少内存   
  //  未直接使用OptionalHeader.SizeOfImage作为结果是因为据说有的编译器生成的exe这个值会填0    
  unsigned  long  CalcTotalImageSize(PIMAGE_DOS_HEADER MzH   
                                  , unsigned  long  FileLen   
                                  , PIMAGE_NT_HEADERS peH   
                                  , PIMAGE_SECTION_HEADERS peSecH)   
   {   
     unsigned  long  res;   
      //  计算pe头的大小    
      res  =  GetAlignedSize( peH -> OptionalHeader.SizeOfHeaders , peH -> OptionalHeader.SectionAlignment);   
   
      //  计算所有节的大小    
       for (  int  i  =   0 ; i  <  peH -> FileHeader.NumberOfSections;  ++ i)   
       {   
          //  超出文件范围    
           if (peSecH[i] -> PointerToRawData  +  peSecH[i] -> SizeOfRawData  >  FileLen)  
           {
              return   0 ;   
         } 
          else   if (peSecH[i] -> VirtualAddress) // 计算对齐后某节的大小    
             {   
              if (peSecH[i] -> Misc.VirtualSize)   
               {   
                 res  =  GetAlignedSize( peSecH[i] -> VirtualAddress  +  peSecH[i] -> Misc.VirtualSize   
                     , peH -> OptionalHeader.SectionAlignment);   
             }    
              else   
               {   
                 res  =  GetAlignedSize( peSecH[i] -> VirtualAddress  +  peSecH[i] -> SizeOfRawData   
                     , peH -> OptionalHeader.SectionAlignment);   
             }    
         }    
          else   if ( peSecH[i] -> Misc.VirtualSize  <  peSecH[i] -> SizeOfRawData )   
           {   
             res  +=  GetAlignedSize( peSecH[i] -> SizeOfRawData   
                 , peH -> OptionalHeader.SectionAlignment);   
         }    
          else   
           {   
             res  +=  GetAlignedSize( peSecH[i] -> Misc.VirtualSize   
                 , peH -> OptionalHeader.SectionAlignment);   
         } //  if_else    
      } //  for    
         
      return  res;   
 }    
   
   
   
   
  //  加载pe到内存并对齐所有节    
  BOOL AlignPEToMem(  void   * Buf   
                   ,  long  Len   
                   , PIMAGE_NT_HEADERS  & peH   
                   , PIMAGE_SECTION_HEADERS  & peSecH   
                   ,  void   *& Mem   
                   , unsigned  long   & ImageSize)   
   {   
     PIMAGE_DOS_HEADER SrcMz; //  DOS头    
      PIMAGE_NT_HEADERS SrcPeH; //  PE头    
      PIMAGE_SECTION_HEADERS SrcPeSecH; //  节表    
         
     SrcMz  =  (PIMAGE_DOS_HEADER)Buf;   
   
      if ( Len  <   sizeof (IMAGE_DOS_HEADER) )    
          return  FALSE;   
        
      if ( SrcMz -> e_magic  !=  IMAGE_DOS_SIGNATURE )   
          return  FALSE;   
        
      if ( Len  <  SrcMz -> e_lfanew  +  ( long ) sizeof (IMAGE_NT_HEADERS) )   
          return  FALSE;   
   
     SrcPeH  =  (PIMAGE_NT_HEADERS)(( int )SrcMz  +  SrcMz -> e_lfanew);   
      if ( SrcPeH -> Signature  !=  IMAGE_NT_SIGNATURE )   
          return  FALSE;   
   
      if ( (SrcPeH -> FileHeader.Characteristics  &  IMAGE_FILE_DLL)  ||    
         (SrcPeH -> FileHeader.Characteristics  &  IMAGE_FILE_EXECUTABLE_IMAGE  ==   0 )  ||    
         (SrcPeH -> FileHeader.SizeOfOptionalHeader  !=   sizeof (IMAGE_OPTIONAL_HEADER)) )   
       {   
          return  FALSE;   
     }    
   
   
     SrcPeSecH  =  (PIMAGE_SECTION_HEADERS)(( int )SrcPeH  +   sizeof (IMAGE_NT_HEADERS));   
     ImageSize  =  CalcTotalImageSize( SrcMz, Len, SrcPeH, SrcPeSecH);   
   
      if ( ImageSize  ==   0  )   
          return  FALSE;   
        
     Mem  =  VirtualAlloc( NULL, ImageSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);  //  分配内存    
       if ( Mem  !=  NULL )   
       {   
          //  计算需要复制的PE头字节数    
          unsigned  long  l  =  SrcPeH -> OptionalHeader.SizeOfHeaders;   
          for (  int  i  =   0 ; i  <  SrcPeH -> FileHeader.NumberOfSections;  ++ i)   
           {   
              if ( (SrcPeSecH[i] -> PointerToRawData)  &&    
                 (SrcPeSecH[i] -> PointerToRawData  <  l) )   
               {   
                 l  =  SrcPeSecH[i] -> PointerToRawData;   
             }    
         }    
         memmove( Mem, SrcMz, l);   
         peH  =  (PIMAGE_NT_HEADERS)(( int )Mem  +  ((PIMAGE_DOS_HEADER)Mem) -> e_lfanew);   
         peSecH  =  (PIMAGE_SECTION_HEADERS)(( int )peH  +   sizeof (IMAGE_NT_HEADERS));   
   
          void   * Pt  =  ( void   * )((unsigned  long )Mem    
              +  GetAlignedSize( peH -> OptionalHeader.SizeOfHeaders   
             , peH -> OptionalHeader.SectionAlignment)   
             );   
   
          for ( i  =   0 ; i  <  peH -> FileHeader.NumberOfSections;  ++ i)   
           {   
              //  定位该节在内存中的位置    
               if (peSecH[i] -> VirtualAddress)   
                 Pt  =  ( void   * )((unsigned  long )Mem  +  peSecH[i] -> VirtualAddress);   
   
              if (peSecH[i] -> SizeOfRawData)   
               {   
                  //  复制数据到内存    
                  memmove(Pt, ( const   void   * )((unsigned  long )(SrcMz)  +  peSecH[i] -> PointerToRawData), peSecH[i] -> SizeOfRawDat  
                  if (peSecH[i] -> Misc.VirtualSize  <  peSecH[i] -> SizeOfRawData)   
                     Pt  =  ( void   * )((unsigned  long )Pt  +  GetAlignedSize(peSecH[i] -> SizeOfRawData, peH -> OptionalHeader.SectionAligent));   
                  else   //  pt 定位到下一节开始位置    
                      Pt  =  ( void   * )((unsigned  long )Pt  +  GetAlignedSize(peSecH[i] -> Misc.VirtualSize, peH -> OptionalHeader.SectionAlient));   
             }    
              else   
               {   
                 Pt  =  ( void   * )((unsigned  long )Pt  +  GetAlignedSize(peSecH[i] -> Misc.VirtualSize, peH -> OptionalHeader.SectionAlignm));   
             }    
         }    
     }    
      return  TRUE;   
 }    
   
   
   
 typedef  void   * (__stdcall  * pfVirtualAllocEx)(unsigned  long ,  void   * , unsigned  long , unsigned  long , unsigned  long );   
 pfVirtualAllocEx MyVirtualAllocEx  =  NULL;   
   
 BOOL IsNT()   
   {   
      return  MyVirtualAllocEx != NULL;   
 }    
   
  //  生成外壳程序命令行    
  char   * PrepareShellExe( char   * CmdParam, unsigned  long  BaseAddr, unsigned  long  ImageSize)   
   {   
      if (IsNT())   
       {   
          char   * Buf  =   new   char [ 256 ];   
         memset(Buf,  0 ,  256 );   
         GetModuleFileName( 0 , Buf,  256 );   
         strcat(Buf, CmdParam);   
          return  Buf;  //  请记得释放内存;-)    
      }    
      else   
       {   
          //  Win98

           return  NULL;   
     }    
 }    
   
  //  是否包含可重定向列表    
  BOOL HasRelocationTable(PIMAGE_NT_HEADERS peH)   
   {   
      return  (peH -> OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress)   
          &&  (peH -> OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].Size);   
 }    
   
   
   
   
 #pragma pack(push,  1 )   
 typedef  struct  {   
     unsigned  long  VirtualAddress;   
     unsigned  long  SizeOfBlock;   
 }   * PImageBaseRelocation;   
 #pragma pack(pop)   
   
  //  重定向PE用到的地址    
  void  DoRelocation(PIMAGE_NT_HEADERS peH,  void   * OldBase,  void   * NewBase)   
   {   
     unsigned  long  Delta  =  (unsigned  long )NewBase  -  peH -> OptionalHeader.ImageBase;   
     PImageBaseRelocation p  =  (PImageBaseRelocation)((unsigned  long )OldBase    
          +  peH -> OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress);   
      while (p -> VirtualAddress  +  p -> SizeOfBlock)   
       {   
         unsigned  short   * pw  =  (unsigned  short   * )(( int )p  +   sizeof ( * p));   
          for (unsigned  int  i = 1 ; i  <=  (p -> SizeOfBlock  -   sizeof ( * p))  /   2 ;  ++ i)   
           {   
              if (( * pw)  &   0xF000   ==   0x3000 )  {   
                 unsigned  long   * t  =  (unsigned  long   * )((unsigned  long )(OldBase)  +  p -> VirtualAddress  +  (( * pw)  &   0x0FFF ));  
                  * t  +=  Delta;   
             }    
              ++ pw;   
         }    
         p  =  (PImageBaseRelocation)pw;   
     }    
 }    
   
  //  卸载原外壳占用内存    
  BOOL UnloadShell(HANDLE ProcHnd, unsigned  long  BaseAddr)   
   {   
     typedef unsigned  long  (__stdcall  * pfZwUnmapViewOfSection)(unsigned  long , unsigned  long );   
     pfZwUnmapViewOfSection ZwUnmapViewOfSection  =  NULL;   
     BOOL res  =  FALSE;   
     HMODULE m  =  LoadLibrary( " ntdll.dll " );   
      if (m)  {   
         ZwUnmapViewOfSection  =  (pfZwUnmapViewOfSection)GetProcAddress(m,  " ZwUnmapViewOfSection " );   
          if (ZwUnmapViewOfSection)   
             res  =  (ZwUnmapViewOfSection((unsigned  long )ProcHnd, BaseAddr)  ==   0 );   
         FreeLibrary(m);   
     }    
      return  res;   
 }    
   
  //  创建外壳进程并获取其基址、大小和当前运行状态    
  BOOL CreateChild( char   * Cmd, CONTEXT  & Ctx, HANDLE  & ProcHnd, HANDLE  & ThrdHnd,    
                  unsigned  long   & ProcId, unsigned  long   & BaseAddr, unsigned  long   & ImageSize)   
   {   
     STARTUPINFOA si;   
     PROCESS_INFORMATION pi;   
     unsigned  long  old;   
     MEMORY_BASIC_INFORMATION MemInfo;   
     memset( & si,  0 ,  sizeof (si));   
     memset( & pi,  0 ,  sizeof (pi));   
     si.cb  =   sizeof (si);   
        
     BOOL res  =  CreateProcess(NULL, Cmd, NULL, NULL, FALSE, CREATE_SUSPENDED, NULL, NULL,  & si,  & pi);  //  以挂起方式运行进   
        if (res)  {   
         ProcHnd  =  pi.hProcess;   
         ThrdHnd  =  pi.hThread;   
         ProcId  =  pi.dwProcessId;   
          //  获取外壳进程运行状态，[ctx.Ebx+8]内存处存的是外壳进程的加载基址，ctx.Eax存放有外壳进程的入口地址    
          Ctx.ContextFlags  =  CONTEXT_FULL;   
         GetThreadContext(ThrdHnd,  & Ctx);   
         ReadProcessMemory(ProcHnd, ( void   * )(Ctx.Ebx + 8 ),  & BaseAddr,  sizeof (unsigned  long ),  & old);  //  读取加载基址    
           void   * p  =  ( void   * )BaseAddr;   
          //  计算外壳进程占有的内存    
           while (VirtualQueryEx(ProcHnd, p,  & MemInfo,  sizeof (MemInfo)))   
           {   
              if (MemInfo.State  =  MEM_FREE)  break ;   
             p  =  ( void   * )((unsigned  long )p  +  MemInfo.RegionSize);   
         }    
         ImageSize  =  (unsigned  long )p  -  (unsigned  long )BaseAddr;   
     }    
      return  res;   
 }    
   
  //  创建外壳进程并用目标进程替换它然后执行    
  HANDLE AttachPE( char   * CmdParam, PIMAGE_NT_HEADERS peH, PIMAGE_SECTION_HEADERS peSecH,    
                  void   * Ptr, unsigned  long  ImageSize, unsigned  long   & ProcId)   
   {   
     HANDLE res  =  INVALID_HANDLE_VALUE;   
     CONTEXT Ctx;   
     HANDLE Thrd;   
     unsigned  long  Addr, Size;   
      char   * s  =  PrepareShellExe(CmdParam, peH -> OptionalHeader.ImageBase, ImageSize);   
      if (s == NULL)  return  res;   
      if (CreateChild(s, Ctx, res, Thrd, ProcId, Addr, Size))  {   
          void   * p  =  NULL;   
         unsigned  long  old;   
          if ((peH -> OptionalHeader.ImageBase  ==  Addr)  &&  (Size  >=  ImageSize))  { //  外壳进程可以容纳目标进程并且加载地址一致    
              p  =  ( void   * )Addr;   
             VirtualProtectEx(res, p, Size, PAGE_EXECUTE_READWRITE,  & old);   
         }    
          else   if (IsNT())  {   
              if (UnloadShell(res, Addr))  { //  卸载外壳进程占有内存    
                  p  =  MyVirtualAllocEx((unsigned  long )res, ( void   * )peH -> OptionalHeader.ImageBase, ImageSize, MEM_RESERVE  |  MECOMMIT, PAGE_EXECUTE_READWRITE);   
             }    
              if ((p  ==  NULL)  &&  HasRelocationTable(peH))  { //  分配内存失败并且目标进程支持重定向    
                  p  =  MyVirtualAllocEx((unsigned  long )res, NULL, ImageSize, MEM_RESERVE  |  MEM_COMMIT, PAGE_EXECUTE_READWRIT  
                  if (p) DoRelocation(peH, Ptr, p);  //  重定向    
              }    
         }    
          if (p)  {   
             WriteProcessMemory(res, ( void   * )(Ctx.Ebx + 8 ),  & p,  sizeof (DWORD),  & old);  //  重置目标进程运行环境中的基址    
              peH -> OptionalHeader.ImageBase  =  (unsigned  long )p;   
              if (WriteProcessMemory(res, p, Ptr, ImageSize,  & old))  { //  复制PE数据到目标进程    
                  Ctx.ContextFlags  =  CONTEXT_FULL;   
                  if ((unsigned  long )p  ==  Addr)   
                     Ctx.Eax  =  peH -> OptionalHeader.ImageBase  +  peH -> OptionalHeader.AddressOfEntryPoint;  //  重置运行环境中的入口地  
                   else   
                     Ctx.Eax  =  (unsigned  long )p  +  peH -> OptionalHeader.AddressOfEntryPoint;   
                 SetThreadContext(Thrd,  & Ctx); //  更新运行环境    
                  ResumeThread(Thrd); //  执行    
                  CloseHandle(Thrd);   
             }    
              else  { //  加载失败,杀掉外壳进程    
                  TerminateProcess(res,  0 );   
                 CloseHandle(Thrd);   
                 CloseHandle(res);   
                 res  =  INVALID_HANDLE_VALUE;   
             }    
         }    
          else  { //  加载失败,杀掉外壳进程    
              TerminateProcess(res,  0 );   
             CloseHandle(Thrd);   
             CloseHandle(res);   
             res  =  INVALID_HANDLE_VALUE;   
         }    
     }    
     delete[] s;   
      return  res;   
 }    
   
   
   
   
   /**/ /**/ /**/ /* ******************************************************\  
 { ******************************************************* }  
 { *                 从内存中加载并运行exe               * }  
 { ******************************************************* }  
 { * 参数：                                                }  
 { * Buffer: 内存中的exe地址                               }  
 { * Len: 内存中exe占用长度                                }  
 { * CmdParam: 命令行参数(不包含exe文件名的剩余命令行参数）}  
 { * ProcessId: 返回的进程Id                               }  
 { * 返回值： 如果成功则返回进程的Handle(ProcessHandle),   }  
 {            如果失败则返回INVALID_HANDLE_VALUE           }  
 { ******************************************************* }  
  \****************************************************** */   
 HANDLE MemExecute( void   * ABuffer,  long  Len,  char   * CmdParam, unsigned  long   * ProcessId)   
   {   
     HANDLE res  =  INVALID_HANDLE_VALUE;   
     PIMAGE_NT_HEADERS peH;   
     PIMAGE_SECTION_HEADERS peSecH;   
      void   * Ptr;   
     unsigned  long  peSz;   
      if (AlignPEToMem(ABuffer, Len, peH, peSecH, Ptr, peSz))   
       {   
         res  =  AttachPE(CmdParam, peH, peSecH, Ptr, peSz,  * ProcessId);   
         VirtualFree(Ptr, peSz, MEM_DECOMMIT);   
     }    
      return  res;   
 }    
   
  //  初始化    
  class  CInit   
   {   
  public :   
     CInit()   
       {   
         MyVirtualAllocEx  =  (pfVirtualAllocEx)GetProcAddress(GetModuleHandle( " Kernel32.dll " ),  " VirtualAllocEx " );   
     }    
 } Init;   
   
   
   
   
 
 
 
  int  main( int  argc,  char *  argv[])
   {
     FILE *  fp;
     fp  =  fopen( " E:\\CProject\\DBGVIEW.EXE " , " rb " );
 
      if  ( fp )
       {
 
         fseek(fp, 0l ,SEEK_END);
          int  file_size = ftell(fp); /**/ /* 获取文件长度 */ 
          fseek(fp, 0l ,SEEK_SET); /**/ /* 回到文件头部 */    
         
         
         LPBYTE pBuf  =   new  BYTE[file_size];   
         memset( pBuf,  0 , file_size);   
 
         fread(pBuf,file_size, 1 ,fp);
 
         DWORD id  =  GetCurrentProcessId();
         unsigned  long  ulProcessId  =   0 ;   
         MemExecute( pBuf, file_size,  "" ,  & ulProcessId);   
         delete[] pBuf;   
         
     }   
     
      return   0 ;
 }