(声明:魏滔序原创,转贴请注明出处。)
所谓DLL远程注入,就是强迫DLL程序运行在其他进程中,这样做的目的无非有两种:第一是伪装自身,第二是控制宿主。前者常见于病毒或木马,后者则一般用于正规之场合,比如常见的输入法、外挂等等,有时Hook(钩子)也用到该技术。由此可见,技术是把双刃剑,区别在于使用技术的人。
DLL远程注入的方法一般有如下几种:
1.修改注册表,系统启动时自动加载。当然,如果卸载就要关闭系统了,或者使用本文的卸载功能。
2.使用SetWindowsHookEx进行注入,该参数最后一个参数值决定注入的全局与否。
3.BHO,这个没什么可说的,仅局限与浏览器。
4.使用CreateRemoteThread进行注入,也就是本文的主要内容。
注入过程大致是:
1.打开目标进程。
2.在目标进程中申请一块内存,用来存放要注入的dll名称。
3.将dll名称写入该内存。
4.获得LoadLibraryA函数的地址,该函数在任何进程中的地址都相同。
5.创建远程线程,也就是执行LoadLibraryA函数了。当然LoadLibraryA的参数就是上面保存的dll名称。
6.等待线程返回
到此为止,dll已经被成功在远程进程中运行了,至于运行后该如何工作,那就发挥你无穷的想像力吧。卸载过程与注入过程雷同,只是区别于后面使用了FreeLibrary函数进行卸载。注意,FreeLibrary函数只能传入模块的句柄,可使用GetModuleHandleA函数获得。
源码奉上:
;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
; Win32汇编实现DLL的远程注入及卸载
; Programmed by 魏滔序
; WebSite: http://www.chenoe.com
; Blog: http://blog.csdn.net/Modest
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
.486 ; create 32 bit code
.model flat, stdcall ; 32 bit memory model
option casemap :none ; case sensitive
include windows.inc
include kernel32.inc
includelib kernel32.lib
RemoteInjectModule PROTO :DWORD,:DWORD
RemoteUnloadModule PROTO :DWORD,:DWORD
.data
szKernel32 db 'Kernel32',0
szGetModuleHandleA db 'GetModuleHandleA',0
szLoadLibraryA db 'LoadLibraryA',0
szFreeLibrary db 'FreeLibrary',0
.code
Start:
RemoteInjectModule proc dwProcID,pszModule
LOCAL hProcess, hThread, dwExitCode
LOCAL pszBuffer,pdwAddress
Invoke OpenProcess,PROCESS_QUERY_INFORMATION Or PROCESS_CREATE_THREAD Or PROCESS_VM_OPERATION Or PROCESS_VM_WRITE, 0, dwProcID
MOV hProcess,EAX
.If hProcess == 0
JMP ErrHandle
.Endif
Invoke VirtualAllocEx,hProcess, 0, MAX_PATH, MEM_COMMIT, PAGE_READWRITE
MOV pszBuffer,EAX
.If pszBuffer == 0
JMP ErrHandle
.Endif
Invoke WriteProcessMemory,hProcess, pszBuffer, pszModule, MAX_PATH, 0
.If EAX == 0
JMP ErrHandle
.Endif
Invoke GetModuleHandle,addr szKernel32
Invoke GetProcAddress,EAX, addr szLoadLibraryA
MOV pdwAddress,EAX
.If pdwAddress == 0
JMP ErrHandle
.Endif
Invoke CreateRemoteThread,hProcess, 0,0, pdwAddress, pszBuffer, 0, 0
MOV hThread,EAX
.If hThread == 0
JMP ErrHandle
.Endif
Invoke WaitForSingleObject,hThread, INFINITE
Invoke GetExitCodeThread,hThread,addr dwExitCode
.If dwExitCode != 0
Invoke VirtualFreeEx, hProcess, pszBuffer, 0, MEM_RELEASE
Invoke CloseHandle,hProcess
MOV EAX,1
.else
MOV EAX,0
.endif
RET
ErrHandle:
.If pszBuffer != 0
Invoke VirtualFreeEx, hProcess, pszBuffer, 0, MEM_RELEASE
.Endif
.If hThread != 0
Invoke CloseHandle, hThread
.Endif
.If hProcess != 0
Invoke CloseHandle,hProcess
.Endif
MOV EAX,0
RET
RemoteInjectModule endp
[HIDE]RemoteUnloadModule proc dwProcID,pszModule
LOCAL hProcess, hThread, dwExitCode
LOCAL pszBuffer,pdwAddress
Invoke OpenProcess,PROCESS_QUERY_INFORMATION Or PROCESS_CREATE_THREAD Or PROCESS_VM_OPERATION Or PROCESS_VM_WRITE, 0, dwProcID
MOV hProcess,EAX
.If hProcess == 0
JMP ErrHandle
.Endif
Invoke VirtualAllocEx,hProcess, 0, MAX_PATH, MEM_COMMIT, PAGE_READWRITE
MOV pszBuffer,EAX
.If pszBuffer == 0
JMP ErrHandle
.Endif
Invoke WriteProcessMemory,hProcess, pszBuffer, pszModule, MAX_PATH, 0
.If EAX==0
JMP ErrHandle
.Endif
Invoke GetModuleHandle,addr szKernel32
Invoke GetProcAddress,EAX, addr szGetModuleHandleA
MOV pdwAddress,EAX
.If pdwAddress == 0
JMP ErrHandle
.Endif
Invoke CreateRemoteThread,hProcess, 0, 0, pdwAddress, pszBuffer, 0,0
MOV hThread,EAX
.If hThread == 0
JMP ErrHandle
.Endif
Invoke WaitForSingleObject,hThread, INFINITE
Invoke GetExitCodeThread, hThread, addr dwExitCode
Invoke VirtualFreeEx, hProcess, pszBuffer, 0, MEM_RELEASE
Invoke CloseHandle, hThread
Invoke GetModuleHandle,addr szKernel32
Invoke GetProcAddress,EAX, addr szFreeLibrary
MOV pdwAddress,EAX
.If pdwAddress == 0
JMP ErrHandle
.Endif
Invoke CreateRemoteThread,hProcess, 0, 0, pdwAddress, dwExitCode, 0,0
MOV hThread,EAX
.If hThread == 0
JMP ErrHandle
.Endif
Invoke WaitForSingleObject,hThread, INFINITE
Invoke GetExitCodeThread, hThread, addr dwExitCode
.If dwExitCode != 0
Invoke VirtualFreeEx, hProcess, pszBuffer, 0, MEM_RELEASE
Invoke CloseHandle,hProcess
MOV EAX,1
.else
MOV EAX,0
.endif
RET
ErrHandle:
.If pszBuffer != 0
Invoke VirtualFreeEx, hProcess, pszBuffer, 0, MEM_RELEASE
.Endif
.If hThread != 0
Invoke CloseHandle, hThread
.Endif
.If hProcess != 0
Invoke CloseHandle,hProcess
.Endif
MOV EAX,0
RET
RemoteUnloadModule endp[/HIDE]
End Start
http://blog.csdn.net/Modest/archive/2008/01/20/2054975.aspx
- 标 题:Win32汇编实现DLL的远程注入及卸载
- 作 者:Modest
- 时 间:2008-03-06 23:53:22
- 链 接:http://bbs.pediy.com/showthread.php?t=60763