It would appear someone has gained access to your rig and taken over with malware or direct attack.
If you are rig is not locked down with VNC disabled, having challenging passwords put in place, and having your rig behind a NAT/firewall: Shut down, reflash the OS Media from scratch and secure the rig.
<for the record, I don’t know jack about ezil mining or the pools you are talking about, but wallet changing is not good>