Excessive resource usage: admin

I keep getting emails below and wonder what is going on. Some process I assume is running as "admin". There have been no breeches of my server. Thanks. Time: Thu Mar 22 09:37:32 2018 -0400 Account: admin Resource: Process Time Exceeded: 5426 > 1800 (seconds) Executable: /bin/bash Command Line: -bash PID: 6329 (Parent PID:6327) Killed: No