Arachne

Arachne is a webshell payload for Windows (aspx) and Linux (php). When run alone, the arachne container reaches out to the specified URL to issue tasking. When an agent links via P2P to an arachne agent, then that agent will remotely reach out to the specified URL to issue tasking.

This version currently supports Mythic 2.3.+ and will update as necessary. It will not work with Mythic 2.2 and lower.

How to install an agent in this format within Mythic

When it's time for you to test out your install or for another user to install your agent, it's pretty simple. Within Mythic you can run the mythic-cli binary to install this in one of three ways:

• sudo ./mythic-cli install github https://github.com/user/repo to install the main branch
• sudo ./mythic-cli install github https://github.com/user/repo -b branchname to install a specific branch of that repo
• sudo ./mythic-cli install folder /path/to/local/folder/cloned/from/github to install from an already cloned down version of an agent repo

Now, you might be wondering when should you or a user do this to properly add your agent to their Mythic instance. There's no wrong answer here, just depends on your preference. The three options are:

• Mythic is already up and going, then you can run the install script and just direct that agent's containers to start (i.e. sudo ./mythic-cli payload start agentName and if that agent has its own special C2 containers, you'll need to start them too via sudo ./mythic-cli c2 start c2profileName).
• Mythic is already up and going, but you want to minimize your steps, you can just install the agent and run sudo ./mythic-cli mythic start. That script will first stop all of your containers, then start everything back up again. This will also bring in the new agent you just installed.
• Mythic isn't running, you can install the script and just run sudo ./mythic-cli mythic start.

Icon

The agent icon for Arachne is from flaticon and created by jemastock.