...

If you have noticed slow services (e.g. Jira, Confluence, Jenkins, etc.) on Technology Nursery lately, I suspect the server was hit with an opportunistic malware attack that uses its CPU for bitcoin mining!  Here is what I did to identify and fix the problem.  Additional   

The malware has been removed.  However, additional work is needed to backup and upgrade Confluence to minimize the attack surface risk by backing up and upgrading Confluence to the latest version.

Symptom

Today, Confluence was very slow to respond.  Looking at Grafana and top, CPU utilization was at 100%.  The following processes where taking up most of the CPU:

...