What is checked
- Commands are compared with the bestiary families: if your history looks like their script, you get a link to the description.
- Typical techniques: a key in authorized_keys, cron jobs, downloading and running a script, wiping history, miners, disabling the firewall.
- In auth.log: how many failed logins there were and whether a login succeeded from an address that was guessing passwords before.
The check only knows what this server's honeypot has seen. An empty result does not mean the system is clean.