Hi Jochen,

I created a small automation script that send a command that requires sudo privileges. I believe this can also be implemented in a connector. In this case you will need to use ShellStream to be able to get the sudo password request:

public void Run(Engine engine)
{
string sLogin = "myUser";
string sPassword = "myUserPassword";
string sudoPassword = "myRootPassword";
string sHostname = "10.11.12.13";
string sCommand = "sudo dmidecode -t system | grep Serial";
string sExpectedResponse = "";
int iPort = 22;

SshClient sshClient = new SshClient(sHostname, iPort, sLogin, sPassword);

// Establish the connection
sshClient.Connect();

IDictionary<Renci.SshNet.Common.TerminalModes, uint> modes = new Dictionary<Renci.SshNet.Common.TerminalModes, uint>();
modes.Add(Renci.SshNet.Common.TerminalModes.ECHO, 53);

// Create a shell stream
var shellStream = sshClient.CreateShellStream("xterm", 255, 50, 800, 600, 1024, modes);

// Get logged in
sExpectedResponse = shellStream.Expect(new Regex(@"[$>]"));
engine.GenerateInformation("[INFO]|Run|Output:" + sExpectedResponse);

// Send command that requires sudo privileges
shellStream.WriteLine(sCommand);

// Expect password or user prompt
sExpectedResponse = shellStream.Expect(new Regex(@"([$#>:])"));
engine.GenerateInformation("[INFO]|Run|Output:" + sExpectedResponse);

// Check to send the password
if (sExpectedResponse.Contains(":"))
{
// Send password
shellStream.WriteLine(sudoPassword);

// Expect user or root prompt
sExpectedResponse = shellStream.Expect(new Regex(@"[$#>]"));

engine.GenerateInformation("[INFO]|Run|Output:" + sExpectedResponse);
}// End if

sshClient.Disconnect();
}// End method Run

For this example, I was able to get the serial number:

The main drawback of this approach is that the response will contain extra characters that you don't need (see screenshot above). Based on this, I believe it will be difficult to extract the information that you are looking for.

I saw other options as well, see this answer in StackOverflow, but they are insecure.