Question

我们有一个服务应用程序，它在控制台会话（WTSGetActiveConsoleSessionId）中生成一个进程，以允许对计算机进行桌面控制样式访问。这在大多数情况下运行良好，但是有一些VM似乎成功创建了进程，只要涉及CreateProcessAsUser的结果，但是不会创建进程。

该服务在LocalSystem帐户下运行。正在启动的进程尚未运行。没有正在运行的病毒防护程序。我们只在Windows Server 2008 R2上看到过这种行为（但这并不是说它是独占的）。

我们使用的代码如下：

function StartProcessInSession(strProcess: String; bLocalSystem: Boolean = True; iSessionID: Integer = -1): Boolean;

  procedure SPISLog(strLog: String; bError: Boolean = False);
  begin
    Log(strLog);
    if bError then Abort;
  end;

var pi: PROCESS_INFORMATION;
  si: STARTUPINFO;
  winlogonPid, dwSessionId: DWord;
  hUserToken, hUserTokenDup, hPToken, hProcess: THANDLE;
  dwCreationFlags: DWORD;
  tp: TOKEN_PRIVILEGES;
  lpenv: Pointer;
  bError: Boolean;
  strClone: String;
begin
  if GetProcessID(strProcess, iSessionID) > 0 then
  begin
    Result := True;
    Exit;
  end;
  Result := False;
  bError := False;
  if not InitProcLibs then Exit;
  if bLocalSystem then strClone := 'winlogon.exe' else strClone := 'explorer.exe';
  winlogonPid := GetProcessID(strClone, iSessionID);
  try
    dwSessionId := WTSGetActiveConsoleSessionId();
    dwCreationFlags := NORMAL_PRIORITY_CLASS or CREATE_NEW_CONSOLE;
    ZeroMemory(@si, sizeof(STARTUPINFO));
    si.cb := sizeof(STARTUPINFO);
    si.lpDesktop := PChar('Winsta0\Default'); 
    ZeroMemory(@pi, sizeof(pi));
    hProcess := OpenProcess(MAXIMUM_ALLOWED, FALSE, winlogonPid);
    if (not OpenProcessToken(hProcess, TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY or TOKEN_DUPLICATE or
      TOKEN_ASSIGN_PRIMARY or TOKEN_ADJUST_SESSIONID or TOKEN_READ or TOKEN_WRITE, hPToken)) then
        bError := True;
    if bError then SPISLog('SPIS - OpenProcessToken failed (' + SysErrorMessage(GetLastError) + ').', True);
    if (not LookupPrivilegeValue(nil, SE_DEBUG_NAME, tp.Privileges[0].Luid)) then bError := True;
    if bError then SPISLog('SPIS - LookupPrivilegeValue failed (' + SysErrorMessage(GetLastError) + ').', True);
    tp.PrivilegeCount := 1;
    tp.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
    DuplicateTokenEx(hPToken, MAXIMUM_ALLOWED, nil, SecurityIdentification, TokenPrimary, hUserTokenDup);
    SetTokenInformation(hUserTokenDup, TokenSessionId, Pointer(dwSessionId), SizeOf(DWORD));
    if (not AdjustTokenPrivileges(hUserTokenDup, FALSE, @tp, SizeOf(TOKEN_PRIVILEGES), nil, nil)) then bError := True;
    if bError then SPISLog('SPIS - AdjustTokenPrivileges failed (' + SysErrorMessage(GetLastError) + ').', True);
    if (GetLastError() = ERROR_NOT_ALL_ASSIGNED) then bError := True;
    if bError then SPISLog('SPIS - AdjustTokenPrivileges: ERROR_NOT_ALL_ASSIGNED (' + SysErrorMessage(GetLastError) + ').', True);
    lpEnv := nil;
    if (CreateEnvironmentBlock(lpEnv, hUserTokenDup, TRUE)) then
      dwCreationFlags := dwCreationFlags or CREATE_UNICODE_ENVIRONMENT
    else
      lpEnv := nil;
    if not Assigned(lpEnv) then SPISLog('SPIS - CreateEnvironmentBlock failed (' + SysErrorMessage(GetLastError) + ').', True);
    try
      UniqueString(strProcess);
      if not CreateProcessAsUser(hUserTokenDup, nil, PChar(strProcess), nil, nil, FALSE,
        dwCreationFlags, lpEnv, PChar(ExtractFilePath(strProcess)), si, pi) then bError := True;
      if bError then 
        SPISLog('SPIS - CreateProcessAsUser failed (' + SysErrorMessage(GetLastError) + ').', True)
      else
        SPISLog('Started process in ' + IntToStr(dwSessionId) + ' using token from ' + IntToStr(winlogonPid) + '.');
      try
        try CloseHandle(hProcess); except {} end;
        try CloseHandle(hUserToken); except {} end;
        try CloseHandle(hUserTokenDup); except {} end;
        try CloseHandle(hPToken); except {} end;
      except
        {}
      end;
    finally
      DestroyEnvironmentBlock(lpEnv);
    end;
  except
    on E: Exception do
    begin
      bError := True;
      if not (E is EAbort) then
        SPISLog('SPIS - ' + E.Message + ' (' + SysErrorMessage(GetLastError) + ').', True);
    end;
  end;
  Result := not bError;
end;

function GetProcessID(strProcess: String; iSessionID: Integer = -1): DWORD;
var dwSessionId, winlogonSessId: DWord;
  hsnap: THandle;
  procEntry: TProcessEntry32;
  myPID: Cardinal;
begin
  Result := 0;
  if not InitProcLibs then Exit;
  { check running processes and return ID of process in current session... }
  if iSessionID = -1 then
    dwSessionId := WTSGetActiveConsoleSessionId
  else
    dwSessionId := iSessionID;
  hSnap := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
  if (hSnap = INVALID_HANDLE_VALUE) then Exit;
  strProcess := UpperCase(ExtractFileName(strProcess));
  myPID:= GetCurrentProcessId;
  procEntry.dwSize := sizeof(TProcessEntry32);
  if (not Process32First(hSnap, procEntry)) then Exit;
  repeat
    if (procEntry.th32ProcessID <> myPID) and ((UpperCase(procEntry.szExeFile) = strProcess) or
      (UpperCase(ExtractFileName(procEntry.szExeFile)) = strProcess)) then
    begin
      winlogonSessId := 0;
      if (ProcessIdToSessionId(procEntry.th32ProcessID, winlogonSessId) and (winlogonSessId = dwSessionId)) then
      begin
        Result := procEntry.th32ProcessID;
        break;
      end;
    end;
  until (not Process32Next(hSnap, procEntry));
end;

有没有人知道它为什么会失败，或者是否有办法通过此调用解决API中发生的事情？

Answer 1

非常感谢你的帮助，我终于找到了问题，我开始静态链接一个DLL（特别是aw_sas64.dll）的过程，这适用于大多数机器而不是其他机器，我仍然不确定为什么（DLL与EXE在同一个文件夹中）。

我无法通过动态链接来使DLL工作（虽然32位版本动态链接好了），但是一旦我评论静态链接和用法，该过程就开始了OK上述程序。

再次，非常感谢大家，我仍然有一些问题，但这解决了这个谜。

CreateProcessAsUser成功，但未创建任何进程

1 个答案: