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serpentine

serpentine is a Windows RAT (Remote Administration Tool) that lets you interact with the clients using a multiplatform RESTful C2 server.

Functionalities:

  • Startup

  • Get files

  • Put files

  • Keylogger (Just get %APPDATA%/svchost/log file)

  • Reverse shell (Using netcat as a client, listen on a port nc -l -p 5555 and request a reverse shell connection to that port)

  • Reverse proxy (Using revp, upload revp to the client and execute it with a reverse shell)

  • Take screenshots

  • Remote desktop (Using qtserpentine frontend) [Work in progress, sending input is still in development]

Dissection

client directory holds the Windows portion of the RAT made with C++ and Boost.

server holds the RESTful server portion made with Java and Spring.

frontend can hold any number of frontends that consume the RESTful API, currently holds goserpentine terminal client and qtserpentine GUI client.

Building & running

Build server with mvn package and then run the JAR with 2 arguments, first being the client-listening port and second the port RESTful API will be served at. Example: java -jar target/serpentine-0.1.0.jar 2222 8080

Build client with Visual Studio and also include Boost libraries: https://www.boost.org/doc/libs/1_73_0/more/getting_started/windows.html Change client settings in config.h.

Build goserpentine frontend with go build and run the resulting executable to see the list of options.

Build qtserpentine by installing Qt Creator and building through that. Provide QTSERPENTINE_API_ADDRESS environment variable that points to the API server.

API

(To learn more about the endpoints and input parameters check the controllers in server code)

/client GET --> Returns list of currently connected clients (clients that pinged in the last 10 seconds)

/client POST --> Changes name associated with a client

/file/{client} POST --> Fetches a file from a client

/file/{client} PUT --> Uploads a file to a client

/shell/{client} POST --> Makes a client initiate a reverse shell connection

/desktop/{client} GET --> Takes and fetches a screenshot

About

just a backup from offline

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