VB 远线程注入技术实现键盘拦截的例子(无DLL)

Option Explicit

Private Sub cmdLock_Click()
If LockKeyboard(True) Then
cmdLock.Enabled = False
cmdUnLock.Enabled = True
End If
End Sub

Private Sub cmdUnLock_Click()
If LockKeyboard(False) Then
cmdLock.Enabled = True
cmdUnLock.Enabled = False
End If
End Sub

Private Sub Form_Load()
Dim bIsLock As Boolean
bIsLock = GetKeyboardState
cmdLock.Enabled = Not bIsLock
cmdUnLock.Enabled = bIsLock
End Sub

模块部分代码：

Option Explicit
'是否包含处理其它键盘消息，True表示处理.
#Const INC_OTHER_KEY = True
'注意，以下所有双版本的API均声明成了 UNICODE 版。 并且许多地方与VB的API浏览器生成的代码有所不同。
Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function ReadProcessMemory Lib "kernel32" (ByVal hProcess As Long, ByVal lpBaseAddress As Long, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long
Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Long, ByVal lpBaseAddress As Long, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long
Private Declare Function GlobalAddAtom Lib "kernel32" Alias "GlobalAddAtomW" (ByVal lpString As Long) As Integer
Private Declare Function GlobalDeleteAtom Lib "kernel32" (ByVal nAtom As Integer) As Integer
Private Declare Function GlobalFindAtom Lib "kernel32" Alias "GlobalFindAtomW" (ByVal lpString As Long) As Integer
Private Const TH32CS_SNAPPROCESS = 2
Private Type PROCESSENTRY32W
dwSize As Long
cntUsage As Long
h32ProcessID As Long ' // this process
th32DefaultHeapID As Long '
h32ModuleID As Long ' // associated exe
cntThreads As Long '
th32ParentProcessID As Long ' // this process's parent process
pcPriClassBase As Long ' // Base priority of process's threads
dwFlags As Long '
szExeFile(1 To 260) As Integer ' // Path
End Type
Private Declare Function CreateToolhelp32Snapshot Lib "kernel32" (ByVal dwFlags As Long, ByVal th32ProcessID As Long) As Long
Private Declare Function Process32First Lib "kernel32" Alias "Process32FirstW" (ByVal hSnapshot As Long, lpPE As PROCESSENTRY32W) As Long
Private Declare Function Process32Next Lib "kernel32" Alias "Process32NextW" (ByVal hSnapshot As Long, lpPE As PROCESSENTRY32W) As Long
Private Declare Function lstrcmpi Lib "kernel32" Alias "lstrcmpiW" (lpString1 As Integer, ByVal lpString2 As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function GetLastError Lib "kernel32" () As Long
Private Type LUID
lowpart As Long
highpart As Long
End Type
Private Type LUID_AND_ATTRIBUTES
pLuid As LUID
Attributes As Long
End Type
Private Type TOKEN_PRIVILEGES
PrivilegeCount As Long
Privileges As LUID_AND_ATTRIBUTES
End Type
Private Const PROCESS_ALL_ACCESS As Long = &H1F0FFF
Private Const TOKEN_QUERY As Long = &H8&
Private Const TOKEN_ADJUST_PRIVILEGES As Long = &H20&
Private Const SE_PRIVILEGE_ENABLED As Long = &H2
Private Const SE_DEBUG_NAME As String = "SeDebugPrivilege"
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long
Private Declare Function LookupPrivilegeValue Lib "advapi32.dll" Alias "LookupPrivilegeValueW" (ByVal lpSystemName As Long, ByVal lpName As Long, lpLuid As LUID) As Long
Private Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As Long, ByVal DisableAllPrivileges As Long, NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Long, ByVal PrevState As Long, ByVal N As Long) As Long
Private Declare Function GetModuleHandle Lib "kernel32" Alias "GetModuleHandleW" (ByVal lpwModuleName As Long) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long
Private Const MEM_COMMIT As Long = &H1000
Private Const MEM_DECOMMIT As Long = &H4000
Private Const PAGE_EXECUTE_READWRITE As Long = &H40
Private Declare Function VirtualAllocEx Lib "kernel32" (ByVal ProcessHandle As Long, ByVal lpAddress As Long, ByVal dwSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As Long
Private Declare Function VirtualFreeEx Lib "kernel32" (ByVal ProcessHandle As Long, ByVal lpAddress As Long, ByVal dwSize As Long, ByVal dwFreeType As Long) As Long
Private Declare Function CreateRemoteThread Lib "kernel32" (ByVal hProcess As Long, ByVal lpThreadAttributes As Long, ByVal dwStackSize As Long, ByVal lpStartAddress As Long, ByVal lpParameter As Long, ByVal dwCreationFlags As Long, lpThreadId As Long) As Long
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Declare Function GetExitCodeThread Lib "kernel32" (ByVal hThread As Long, lpExitCode As Long) As Long
#If INC_OTHER_KEY Then
Private Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExW" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Private Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hHook As Long) As Long
Private Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lParam As Any) As Long
#End If
Private Const ATOM_FLAG As String = "HookSysKey"
Private Const SHELL_FALG As String = "Winlogon"
Private Const SHELL_CODE_DWORDLEN = 317 '注入代码所占的双字数
Private Const SHELL_CODE_LENGTH = (SHELL_CODE_DWORDLEN * 4) '字节数
Private Const SHELL_FUNCOFFSET = &H8 '注入代码线程函数偏移量
Private mlShellCode(SHELL_CODE_DWORDLEN - 1) As Long
#If INC_OTHER_KEY Then
Private m_lHookID As Long '键盘钩子句柄
Private Type KBDLLHOOKSTRUCT
vkCode As Long
scanCode As Long
flags As Long
time As Long
dwExtraInfo As Long
End Type
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
#End If
'============================================
' 锁定/解锁键盘
' 参数：布尔型，真表示锁定
' 返回：布尔型, 真表示成功
' 注意：非 Ctrl+Alt+Del 键使用普通钩子技术，因此
' 程序在退出时注意要卸载钩子。
'============================================
Public Function LockKeyboard(ByVal bLock As Boolean) As Boolean
Dim lResult As Long
Dim lStrPtr As Long
Dim iAtom As Integer
lStrPtr = StrPtr(SHELL_FALG)
iAtom = GlobalFindAtom(lStrPtr)
If iAtom = 0 Then
lResult = InsertAsmCode
Debug.Assert lResult = 0
If lResult Then Exit Function
End If
lStrPtr = StrPtr(ATOM_FLAG)
iAtom = GlobalFindAtom(lStrPtr)
If bLock Then
#If INC_OTHER_KEY Then
'强烈建议：使用了SetWindowsHookEx的话，请编译后再运行！
m_lHookID = SetWindowsHookEx(13, AddressOf LowLevelKeyboardProc, App.hInstance, 0)
#End If
If iAtom = 0 Then iAtom = GlobalAddAtom(lStrPtr)
LockKeyboard = (iAtom <> 0)
Debug.Assert LockKeyboard
Else
#If INC_OTHER_KEY Then
If m_lHookID Then Call UnhookWindowsHookEx(m_lHookID)
#End If
If iAtom Then iAtom = GlobalDeleteAtom(iAtom)
LockKeyboard = iAtom = 0
End If
End Function
Public Function GetKeyboardState() As Boolean
GetKeyboardState = GlobalFindAtom(StrPtr(ATOM_FLAG)) <> 0
End Function
#If INC_OTHER_KEY Then
Private Function LowLevelKeyboardProc(ByVal nCode As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Dim KBEvent As KBDLLHOOKSTRUCT
If nCode >= 0 Then
'在这里可以加入实际的过滤条件
CopyMemory KBEvent, ByVal lParam, 20& 'sizeof KBDLLHOOKSTRUCT=20
'wParam = 消息，如WM_KEYDOWN, WM_KEYUP等
Debug.Print Hex$(KBEvent.vkCode) 'VK_??? 定义的键码
LowLevelKeyboardProc = 1 '１屏蔽,否则应调用CallNextHookEx
Else
LowLevelKeyboardProc = CallNextHookEx(m_lHookID, nCode, wParam, lParam)
End If
End Function
#End If
'----------------------------------------------
' 远程线程插入函数
' 功能：向 Winlogon 进程插入远程线程代码，并执行
' 返回：0表示成功，非0表示标准的系统错误代号
'----------------------------------------------
Private Function InsertAsmCode() As Long
Const WINLOGON As String = "Winlogon.exe"
Dim hProcess As Long '远端进程句柄
Dim hPId As Long '远端进程ID
Dim lResult As Long '一般返回变量
Dim pToken As TOKEN_PRIVILEGES
Dim hToken As Long
Dim hRemoteThread As Long
Dim hRemoteThreadID As Long
Dim lDbResult(1) As Long
Dim lRemoteAddr As Long
'------------------------------------
'取winlogon进程ID
'------------------------------------
hPId = GetProcessIdFromName(WINLOGON)
If hPId = 0 Then
InsertAsmCode = GetLastError
Debug.Assert False
Exit Function
End If
'------------------------------------
'提升本进程权限，以取得对winlogon进程操作的许可
'------------------------------------
lResult = OpenProcessToken(GetCurrentProcess(), _
TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, _
hToken)
Debug.Assert lResult
lResult = LookupPrivilegeValue(0, StrPtr(SE_DEBUG_NAME), pToken.Privileges.pLuid)
Debug.Assert lResult
pToken.PrivilegeCount = 1
pToken.Privileges.Attributes = SE_PRIVILEGE_ENABLED
lResult = AdjustTokenPrivileges(hToken, False, pToken, Len(pToken), 0, 0)
Debug.Assert lResult
'------------------------------------
'打开winlogon进程
'------------------------------------
hProcess = OpenProcess(PROCESS_ALL_ACCESS, 0, hPId)
Debug.Assert hProcess
If hProcess Then
'------------------------------------
'初始注入代码
'------------------------------------
Call InitShellCode
'------------------------------------
'远端进程分配内存
'------------------------------------
lRemoteAddr = VirtualAllocEx(hProcess, 0, SHELL_CODE_LENGTH, MEM_COMMIT, PAGE_EXECUTE_READWRITE)
Debug.Assert lRemoteAddr
'------------------------------------
'写入 shell 代码
'------------------------------------
If lRemoteAddr Then
InsertAsmCode = WriteProcessMemory(hProcess, lRemoteAddr, mlShellCode(0), SHELL_CODE_LENGTH, 0)
Else
InsertAsmCode = GetLastError
Exit Function
End If
'------------------------------------
'创建远程线程
'------------------------------------
hRemoteThread = CreateRemoteThread(hProcess, 0, 0, lRemoteAddr + SHELL_FUNCOFFSET, 0, 0, hRemoteThreadID)
If hRemoteThread = 0 Then
InsertAsmCode = GetLastError
Debug.Assert hRemoteThread
Exit Function
End If
'------------------------------------
'等待远程线程
'------------------------------------
Call WaitForSingleObject(hRemoteThread, -1)
Call GetExitCodeThread(hRemoteThread, InsertAsmCode)
Call CloseHandle(hRemoteThread)
'------------------------------------
'释放远端进程内存
'------------------------------------
Call VirtualFreeEx(hProcess, lRemoteAddr, SHELL_CODE_LENGTH, MEM_DECOMMIT)
Else
InsertAsmCode = GetLastError
End If
End Function
'============================================
' 初始线程代码
'============================================
Private Function InitShellCode() As Long
Const kernel32 As String = "kernel32.dll"
Dim hDll As Long
'------------------------------------
'提取注入代码所需的API函数
'------------------------------------
hDll = GetModuleHandle(StrPtr(kernel32)): Debug.Assert hDll
mlShellCode(0) = GetProcAddress(hDll, "GetModuleHandleW")
mlShellCode(1) = GetProcAddress(hDll, "GetProcAddress")
'---------------------------
' 以下代码由 MASM32 产生
mlShellCode(2) = &HE853&
mlShellCode(3) = &H815B0000
mlShellCode(4) = &H40100EEB
mlShellCode(5) = &H238E800
mlShellCode(6) = &HC00B0000
mlShellCode(7) = &H838D5075
mlShellCode(8) = &H4010B0
mlShellCode(9) = &HD093FF50
mlShellCode(10) = &HF004013
mlShellCode(11) = &HC00BC0B7
mlShellCode(12) = &H683A75
mlShellCode(13) = &H6A020000
mlShellCode(14) = &H8D006A00
mlShellCode(15) = &H4010B083
mlShellCode(16) = &H93FF5000
mlShellCode(17) = &H401090
mlShellCode(18) = &H1874C00B
mlShellCode(19) = &H10C2938D
mlShellCode(20) = &H6A0040
mlShellCode(21) = &H93FF5052
mlShellCode(22) = &H401094
mlShellCode(23) = &H474C00B
mlShellCode(24) = &HAEB0AEB
mlShellCode(25) = &H108C93FF
mlShellCode(26) = &H2EB0040
mlShellCode(27) = &HC25BC033
mlShellCode(28) = &HFF8B0004
mlShellCode(38) = &H410053
mlShellCode(39) = &H200053
mlShellCode(40) = &H690077
mlShellCode(41) = &H64006E
mlShellCode(42) = &H77006F
mlShellCode(43) = &HFF8B0000
mlShellCode(44) = &H690057
mlShellCode(45) = &H6C006E
mlShellCode(46) = &H67006F
mlShellCode(47) = &H6E006F
mlShellCode(48) = &H8B550000
mlShellCode(49) = &HF0C481EC
mlShellCode(50) = &H53FFFFFD
mlShellCode(51) = &HE8&
mlShellCode(52) = &HEB815B00
mlShellCode(53) = &H4010D1
mlShellCode(54) = &H10468
mlShellCode(55) = &HF8858D00
mlShellCode(56) = &H50FFFFFD
mlShellCode(57) = &HFF0875FF
mlShellCode(58) = &H40108093
mlShellCode(59) = &HF8858D00
mlShellCode(60) = &H50FFFFFD
mlShellCode(61) = &H1098838D
mlShellCode(62) = &HFF500040
mlShellCode(63) = &H40107C93
mlShellCode(64) = &H75C00B00
mlShellCode(65) = &H68406A69
mlShellCode(66) = &H1000&
mlShellCode(67) = &H7668&
mlShellCode(68) = &HFF006A00
mlShellCode(69) = &H40107493
mlShellCode(70) = &H74C00B00
mlShellCode(71) = &H85896054
mlShellCode(72) = &HFFFFFDF0
mlShellCode(73) = &H75FFFC6A
mlShellCode(74) = &H8493FF08
mlShellCode(75) = &H8D004010
mlShellCode(76) = &H4013C893
mlShellCode(77) = &HFC028900
mlShellCode(78) = &HFDF0BD8B
mlShellCode(79) = &H76B9FFFF
mlShellCode(80) = &H8D000000
mlShellCode(81) = &H401374B3
mlShellCode(82) = &H8DA4F300
mlShellCode(83) = &H4010B083
mlShellCode(84) = &H93FF5000
mlShellCode(85) = &H401078
mlShellCode(86) = &HFDF0B5FF
mlShellCode(87) = &HFC6AFFFF
mlShellCode(88) = &HFF0875FF
mlShellCode(89) = &H40108893
mlShellCode(90) = &HC0336100
mlShellCode(91) = &HC03303EB
mlShellCode(92) = &HC2C95B40
mlShellCode(93) = &H6B0008
mlShellCode(94) = &H720065
mlShellCode(95) = &H65006E
mlShellCode(96) = &H33006C
mlShellCode(97) = &H2E0032
mlShellCode(98) = &H6C0064
mlShellCode(99) = &H6C&
mlShellCode(100) = &H730075
mlShellCode(101) = &H720065
mlShellCode(102) = &H320033
mlShellCode(103) = &H64002E
mlShellCode(104) = &H6C006C
mlShellCode(105) = &H69560000
mlShellCode(106) = &H61757472
mlShellCode(107) = &H6572466C
mlShellCode(108) = &H6C470065
mlShellCode(109) = &H6C61626F
mlShellCode(110) = &H646E6946
mlShellCode(111) = &H6D6F7441
mlShellCode(112) = &H6C470057
mlShellCode(113) = &H6C61626F
mlShellCode(114) = &H41646441
mlShellCode(115) = &H576D6F74
mlShellCode(116) = &H74736C00
mlShellCode(117) = &H706D6372
mlShellCode(118) = &H4F005769
mlShellCode(119) = &H446E6570
mlShellCode(120) = &H746B7365
mlShellCode(121) = &H57706F
mlShellCode(122) = &H6D756E45
mlShellCode(123) = &H6B736544
mlShellCode(124) = &H57706F74
mlShellCode(125) = &H6F646E69
mlShellCode(126) = &H47007377
mlShellCode(127) = &H69577465
mlShellCode(128) = &H776F646E
mlShellCode(129) = &H74786554
mlShellCode(130) = &H65470057
mlShellCode(131) = &H6E695774
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