动态库注入--远程线程

Posted 2020-09-09 半程烟沙

• 现在一般很少有人使用远程线程这种方法来注入动态库或者ShellCode,一般就用来作为一种注入方法来学习。
• 实现流程

   a根据进程ID得到进程句柄。

    b在kernel32.dll中得到LoadLibrary()函数的地址。

    c在目标进程中申请内存，并写入动态库的地址（作为LoadLibrary函数的参数）。

    d调用CreateRemoteThread（）创建远程线程。

      

  CreateRemoteThread(ProcessHandle,None,0,LoadlibraryAddr,DLL_PATH_ADDR,0,byref(thread_id))

   

• 代码实现

  # -*- coding:utf-8 -*-
  from ctypes import *
  import ctypes
  import os
  import psutil
  import re
  import sys
  
  
  def InjectDll(pid,dll_Path):
      PAGE_RW_PRIV = 0x04
      PROCESS_ALL_ACCESS = (0x000F0000 | 0x00100000 | 0xFFF)
      VIRTUAL_MEM = (0x1000 | 0x2000)
  
      kernel32 = windll.kernel32
      print ("[+] Starting DLL Injector")
      dllLength = len(dll_path)
      print("[+] Getting Process Handle From ProcessId %d" ,pid)
      #打开进程的进程句柄
      ProcessHandle = kernel32.OpenProcess(PROCESS_ALL_ACCESS,False,pid)
      if ProcessHandle == None:
          print("Unable to Get Process Handle")
          sys.exit(0)
  
      print("In TargetProcess Alloc Buffer Space")
      #在对方虚拟内存地址中申请内存 ，存放DLL的地址
      DLL_PATH_ADDR = kernel32.VirtualAllocEX(ProcessHandle,
                                              0,
                                              dllLength,
                                              VIRTUAL_MEM,
                                              PAGE_RW_PRIV)
      bool_Write = c_int(0)
      print("Writing Dll Path to Target Process Space")
      #将动态库的地址写入目标进程中
      kernel32.WriteProcessMemory(ProcessHandle,
                                DLL_PATH_ADDR,
                                dll_Path,
                                dllLength,
                                byref(bool_Write))
  
      #得kernel32.dll模块的地址
      print("\t[+] Resolving Call Spacific function & librarise")
      kernel32DllHandle = kernel32.GetModuleHandleA("kernel32.dll")
  
      #得LoadLibrary函数地址
      LoadlibraryAddr = kernel32.GetProcAddress(kernel32DllHandle)
  
      thread_id = c_ulong(0)
      ThreadHandle = kernel32.CreateRemoteThread(ProcessHandle,
                                                None,
                                                0,
                                                LoadlibraryAddr,
                                                DLL_PATH_ADDR,
                                                0,byref(thread_id))
  
      if not ThreadHandle:
          print("Injection Failed exiting ")
          sys.exit(0)
      else:
          print("Remote Thread Id %d" ,thread_id)
  
  
  
  
  
  
  if __name__ == "__main__":
  
      pid = input("输入进程ID")
      target = []
      i = 0
      # 判断计算机版本
      if str(ctypes.sizeof(ctypes.c_voidp)) == ‘4‘:
          print("Runing on a X86 machine seleteing DLL")
          dll_path = os.path.abspath("vminjector32.dll")
      else:
          print("Running on a x64 machine selecting DLL")
          dll_path = os.path.abspath("vminjector64.dll")
  
      print(‘Configured DLL path to %s \n‘ % dll_path)
      InjectDll(pid,dll_path)