Hacking attempt?

Hello,
Whenever I run the comand:

root@mercury [~]# ps awux | grep bc
nobody 29477 0.0 0.0 1368 172 ? S Jun01 0:00 ./bc

I receive the above answer.
1. Does this mean that there is a hack attempt?
2. How do I determine the user that tries to hack my server?

Thanx in advance.

 

 

 

 

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