This is a Mythic agent for interacting with the 3rd party service, Nemesis.
This doesn't build a payload, but instead generates a "callback" within Mythic that allows you to interact with Nemesis's API.
Once you have Nemesis running, set your basic auth values as NEMESIS_USERNAME and NEMESIS_PASSWORD as user secrets in the Mythic UI (red key on your operator settings page).
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/repoto install the main branchsudo ./mythic-cli install github https://github.com/user/repo branchnameto install a specific branch of that reposudo ./mythic-cli install folder /path/to/local/folder/cloned/from/githubto 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 start agentNameand if that agent has its own special C2 containers, you'll need to start them too viasudo ./mythic-cli 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 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 start.
View the rendered documentation by clicking on Docs -> Agent Documentation in the upper right-hand corner of the Mythic interface.