timwhitez starred reinschauer

A PoC to remotely control Windows machines over Websockets.

Other than most HVNC implementations, reinschauer converts raw bitmaps to JPEG before sending data across the network to reduce frame size.
FPS can be set via the GUI.
Basic mouse and keyboard controls are possible.
You can use the script in the server folder to generate TLS server files or bring your own.
The server window can be resized freely, while click events should™ be translated to the correct pixel on the target machine.

Protocol

+----------------------------------------------------------------------------------------+
|                                                                                        |
|                                                                                        |
|                  +----------------------------------------------------+                |
|                  |#1: Type (Binary or Text)                           |                |
|                  |    Binary: JPG Frame                               |                |
|                  |                                                    |                |
|                  |#2: Text                                            |                |
|                  |    FPS <FPS Count>                                 |                |
|                  |    LCL X Y (Left Click + Coordinates)              |                |
|                  |    RCL X Y                                         |                |
|                  |    KEY <Char>                                      |      xxxxxx    |
|       xxxxx   <--+----------------------------------------------------+--> xxxx   xx   |
|       x   xx                     Websockets via TLS                        xx       x  |
| x     xxxxxx                                                                xxxxxxxxx  |
| xxx     x   xx                                                          xx    x        |
|     xxxxxxxx                                                              xxxxx xxxxxx |
|         x                                                                   xxxxx      |
|         xx                                                                   xx        |
|         x xx                                                                 xxx       |
|        xx  xx                                                                x xx      |
|        x    xx                                                              xx  xxx    |
|       x      xx                                                             x     xx   |
|       x       x                                                            xx      x   |
+----------------------------------------------------------------------------------------+

FAQ

How to build?

$ cd client && GOOS=windows GOARCH=amd64 go build
$ cd server && GOOS=linux GOARCH=amd64 go build

You may have to go get stuff before. Use -ldflags -H=windowsgui to disable to console window.

Who's the client/server?

The client is executed on the target (Windows) machine. The server component is executed on the tester's (Linux) machine.

Is this a HVNC / Hidden Desktop?

No. It uses the same Desktop as the user.

Some keys and key combinations do not work, pls fix

I know. I have better things to do :P

The Client uses too much CPU Time

Using a lower FPS value may work.

I don't have a direct connection between client and server

Use a socat redirector.