Question

我编写了一个程序，该程序应查询终端服务API并打印出有关终端服务盒上运行的会话的一些状态信息。我正在使用WTSQuerySessionInformation函数执行此操作并返回一些数据，但大多数数据似乎都丢失了......有谁知道为什么？

这是我的计划：

void WTSGetString( HANDLE serverHandle, DWORD sessionid, WTS_INFO_CLASS command, wchar_t* commandStr) 
{
    DWORD bytesReturned = 0;
    LPTSTR pData = NULL;
    if (WTSQuerySessionInformation(serverHandle, sessionid, command, &pData, &bytesReturned))
    {
        wprintf(L"\tWTSQuerySessionInformationW - session %d - %s returned \"%s\"\n", sessionid, commandStr, pData);    
    }
    else
    {
        wprintf(L"\tWTSQuerySessionInformationW - session %d - %s failed - error=%d - ", sessionid, commandStr, GetLastError());
        printLastError(NULL, GetLastError());
    }
    WTSFreeMemory(pData);
}


void ExtractFromWTS( HANDLE serverHandle, DWORD sessionid ) 
{

    WTSGetString(serverHandle, sessionid, WTSInitialProgram, L"WTSInitialProgram");
    WTSGetString(serverHandle, sessionid, WTSApplicationName, L"WTSApplicationName");
    WTSGetString(serverHandle, sessionid, WTSWorkingDirectory, L"WTSWorkingDirectory");
    WTSGetString(serverHandle, sessionid, WTSOEMId, L"WTSOEMId");
    WTSGetString(serverHandle, sessionid, WTSSessionId, L"WTSSessionId");
    WTSGetString(serverHandle, sessionid, WTSUserName, L"WTSUserName");
    WTSGetString(serverHandle, sessionid, WTSWinStationName, L"WTSWinStationName");
    WTSGetString(serverHandle, sessionid, WTSDomainName, L"WTSDomainName");
    WTSGetString(serverHandle, sessionid, WTSConnectState, L"WTSConnectState");
    WTSGetString(serverHandle, sessionid, WTSClientBuildNumber, L"WTSClientBuildNumber");
    WTSGetString(serverHandle, sessionid, WTSClientName, L"WTSClientName");
    WTSGetString(serverHandle, sessionid, WTSClientDirectory, L"WTSClientDirectory");
    WTSGetString(serverHandle, sessionid, WTSClientProductId, L"WTSClientProductId");
    WTSGetString(serverHandle, sessionid, WTSClientHardwareId, L"WTSClientHardwareId");
    WTSGetString(serverHandle, sessionid, WTSClientAddress, L"WTSClientAddress");
    WTSGetString(serverHandle, sessionid, WTSClientDisplay, L"WTSClientDisplay");
    WTSGetString(serverHandle, sessionid, WTSClientProtocolType, L"WTSClientProtocolType");
}

int _tmain(int argc, _TCHAR* argv[])
{
    PWTS_SESSION_INFOW ppSessionInfo = 0;
    DWORD pCount;
    if(!WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &ppSessionInfo, &pCount))
    {
        printLastError(L"WTSEnumerateSessions", GetLastError());
        return 1;
    }

    wprintf(L"%d WTS sessions found on host\n", pCount);

    for (unsigned int i=0; i<pCount; i++)
    {
        wprintf(L"> session=%d, stationName = %s\n", ppSessionInfo[i].SessionId, ppSessionInfo[i].pWinStationName);
        ExtractFromWTS(WTS_CURRENT_SERVER_HANDLE, ppSessionInfo[i].SessionId);
        LPWSTR sessionstr = new wchar_t[200];
        wsprintf(sessionstr, L"%d", ppSessionInfo[i].SessionId);    
    }

    return 0;
}

这是输出：

C:\Users\Administrator\Desktop>ObtainWTSStartShell.exe empserver1
4 WTS sessions found on host
> session=0, stationName = Services
        WTSQuerySessionInformationW - session 0 - WTSInitialProgram failed - error=87 - The paramete
r is incorrect.

        WTSQuerySessionInformationW - session 0 - WTSApplicationName failed - error=87 - The paramet
er is incorrect.

        WTSQuerySessionInformationW - session 0 - WTSWorkingDirectory returned ""
        WTSQuerySessionInformationW - session 0 - WTSOEMId returned ""
        WTSQuerySessionInformationW - session 0 - WTSSessionId returned ""
        WTSQuerySessionInformationW - session 0 - WTSUserName returned ""
        WTSQuerySessionInformationW - session 0 - WTSWinStationName returned "Services"
        WTSQuerySessionInformationW - session 0 - WTSDomainName returned ""
        WTSQuerySessionInformationW - session 0 - WTSConnectState returned "♦"
        WTSQuerySessionInformationW - session 0 - WTSClientBuildNumber returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientName returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientDirectory returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientProductId returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientHardwareId returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientAddress returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientDisplay returned ""
        WTSQuerySessionInformationW - session 0 - WTSClientProtocolType returned ""
        GetShellProcessNameFromUserPolicy - Error: Unable to open policy key - returned [2]
        GetShellProcessName succeseded - explorer.exe
> session=1, stationName = Console
        WTSQuerySessionInformationW - session 1 - WTSInitialProgram returned ""
        WTSQuerySessionInformationW - session 1 - WTSApplicationName returned ""
        WTSQuerySessionInformationW - session 1 - WTSWorkingDirectory returned ""
        WTSQuerySessionInformationW - session 1 - WTSOEMId returned ""
        WTSQuerySessionInformationW - session 1 - WTSSessionId returned "☺"
        WTSQuerySessionInformationW - session 1 - WTSUserName returned ""
        WTSQuerySessionInformationW - session 1 - WTSWinStationName returned "Console"
        WTSQuerySessionInformationW - session 1 - WTSDomainName returned ""
        WTSQuerySessionInformationW - session 1 - WTSConnectState returned "☺"
        WTSQuerySessionInformationW - session 1 - WTSClientBuildNumber returned ""
        WTSQuerySessionInformationW - session 1 - WTSClientName returned ""
        WTSQuerySessionInformationW - session 1 - WTSClientDirectory returned ""
        WTSQuerySessionInformationW - session 1 - WTSClientProductId returned ""
        WTSQuerySessionInformationW - session 1 - WTSClientHardwareId returned ""
        WTSQuerySessionInformationW - session 1 - WTSClientAddress returned ""
        WTSQuerySessionInformationW - session 1 - WTSClientDisplay returned "?"
        WTSQuerySessionInformationW - session 1 - WTSClientProtocolType returned ""
        GetShellProcessNameFromUserPolicy - Error: Unable to open policy key - returned [2]
        GetShellProcessName succeseded - explorer.exe
> session=3, stationName = RDP-Tcp#0
        WTSQuerySessionInformationW - session 3 - WTSInitialProgram returned ""
        WTSQuerySessionInformationW - session 3 - WTSApplicationName returned ""
        WTSQuerySessionInformationW - session 3 - WTSWorkingDirectory returned ""
        WTSQuerySessionInformationW - session 3 - WTSOEMId returned ""
        WTSQuerySessionInformationW - session 3 - WTSSessionId returned "♥"
        WTSQuerySessionInformationW - session 3 - WTSUserName returned "Administrator"
        WTSQuerySessionInformationW - session 3 - WTSWinStationName returned "RDP-Tcp#0"
        WTSQuerySessionInformationW - session 3 - WTSDomainName returned "EMPSERVER1"
        WTSQuerySessionInformationW - session 3 - WTSConnectState returned ""
        WTSQuerySessionInformationW - session 3 - WTSClientBuildNumber returned "?"
        WTSQuerySessionInformationW - session 3 - WTSClientName returned "APWADEV03"
        WTSQuerySessionInformationW - session 3 - WTSClientDirectory returned "C:\Windows\System32\m
stscax.dll"
        WTSQuerySessionInformationW - session 3 - WTSClientProductId returned "☺"
        WTSQuerySessionInformationW - session 3 - WTSClientHardwareId returned ""
        WTSQuerySessionInformationW - session 3 - WTSClientAddress returned "☻"
        WTSQuerySessionInformationW - session 3 - WTSClientDisplay returned "?"
        WTSQuerySessionInformationW - session 3 - WTSClientProtocolType returned "☻"
        GetShellProcessNameFromUserPolicy - Error: Unable to open policy key - returned [2]
        GetShellProcessName succeseded - explorer.exe
> session=65536, stationName = RDP-Tcp
        WTSQuerySessionInformationW - session 65536 - WTSInitialProgram returned ""
        WTSQuerySessionInformationW - session 65536 - WTSApplicationName returned ""
        WTSQuerySessionInformationW - session 65536 - WTSWorkingDirectory returned ""
        WTSQuerySessionInformationW - session 65536 - WTSOEMId returned ""
        WTSQuerySessionInformationW - session 65536 - WTSSessionId returned ""
        WTSQuerySessionInformationW - session 65536 - WTSUserName returned ""
        WTSQuerySessionInformationW - session 65536 - WTSWinStationName returned "RDP-Tcp"
        WTSQuerySessionInformationW - session 65536 - WTSDomainName returned ""
        WTSQuerySessionInformationW - session 65536 - WTSConnectState returned "♠"
        WTSQuerySessionInformationW - session 65536 - WTSClientBuildNumber returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientName returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientDirectory returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientProductId returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientHardwareId returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientAddress returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientDisplay returned ""
        WTSQuerySessionInformationW - session 65536 - WTSClientProtocolType returned ""
        GetShellProcessNameFromUserPolicy - Error: Unable to open policy key - returned [2]
        GetShellProcessName succeseded - explorer.exe

如您所见，某些数据看起来有效，但不是全部....

Answer 1

即使WTSQuerySessionInformation采用LPTSTR来保存返回的数据，但数据并不总是字符串。在大多数情况下，尝试printf不是字符串的东西不会很好。您看到空/垃圾字符串这一事实意味着有时LPTSTR指向的缓冲区以'\ 0'开头（如果作为字符串读取），printf将作为空字符串打印。

而是尝试在HEX表示中打印出字符串的每个字符。遍历字符串中的每个字符（0到bytesReturned-1）并将其打印为十六进制。这将使您更好地了解LPTSTR缓冲区中的内容。

Answer 2

嗯，答案似乎是这些字段在终端服务/ RDP会话上为空是相当正常的。此API最初是Citrix API，并且有一个WF等效于大多数这些WTS功能。在Citrix / IDA服务器上运行时，您似乎从我的程序中获得了更多的数据，这似乎可以更充分地实现此会话API。话虽如此，我还看到了使用MS Remote App时填写的更多字段。但是，基本上我的计划正在运作......

Answer 3

我认为WTSQuerySessionInformation需要您首先获取权限才能正确返回所有数据？

Answer 4

我从来没有得过任何东西，除了当前的会话内容。

    int _tmain(int argc, _TCHAR* argv[])
    {

        //  if(!WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &ppSessionInfo, &pCount))
        //  {
        ////The stuff coming back from WTSEnumerateSessions in ppSessionInfo doesn't seem to be useful. 

        if (GetSystemMetrics(SM_REMOTESESSION) == 0)
        {
            //it ain't remote.  give up.
            return 1;
        }

        DWORD bytesReturned = 0;
        LPTSTR pData = NULL;
        WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, WTSSessionId, &pData, &bytesReturned);
        DWORD sessionId = pData[0]; /*for lookin' at in the debugger*/
        wprintf(L"%d WTS session where you will see stuff.  CURRENT_SESSION\n", pData[0]);

        ExtractFromWTS(WTS_CURRENT_SERVER_HANDLE, pData[0]); 
        LPWSTR sessionstr = new wchar_t[200];
        wsprintf(sessionstr, L"%d", pData[0]);    

        getchar();
        return 0;
    }

Answer 5

我们发现的一个解决方案就是这样。根据注册信息：

您在HKLM \ Software \ Citrx \ Ica \ Session下查询远程注册表以获取所有注册表项（即会话ID）。然后你读他们从每个子键连接值的PublishedName。之后，您将WTSQuerySessionInformation中的会话ID与注册表项名称进行匹配，您就完成了。

某些PowerShell PoC代码如下所示：

$Reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine', 'YOURSERVER')
$RegKey = $Reg.OpenSubKey("SOFTWARE\\Citrix\\ICA\\Session")
foreach ($sessionId in $RegKey.GetSubKeyNames())
{
    $sessionKey = $RegKey.OpenSubKey($sessionId + "\\Connection")
    if ($sessionKey -ne $null)
    {
        $sessionKey.GetValue("PublishedName")
        $sessionKey.Close()
    }
}    
$RegKey.Close()
$Reg.Close()

WTSQuerySessionInformation返回空字符串

5 个答案: