This is currently the staff's job, to find and ban hackers. However, as a community member you can report players to make CubeCraft a hacker-less place! If you don't already have a report account, follow these steps to make one. I also think it would be unwise to share account details with anyone, even staff.
Type /registerreports in game and follow the instructions given from there it will take you to your report dashboard, where you can add a report. Once you have a video of a hacker that is under 5 minutes long, you can upload it to YouTube. From there, you can create a report that is accurately filled out about the hacker you find. After you submit the report, it's status will say "Open". This means that no staff member has viewed the report yet and the report is pending. After a staff member views your report, it will either say "Handled" or "Closed". Handled means that a staff member has viewed the report and punished the hacker. Closed means that the report was denied. To see more details about a Handled or Closed report, you can click on the player's name to see a message from a staff member about the report.