Securame is correct, the 888888 is a local admin account. It cannot be used over a network connection. Only from the headend with monitor and mouse.
If you don't want to be hacked here are some tips.
•Do not use P2P connection, use port forwarding.
•Do not use default ports (80 & 37777), create custom ports and forward them on the gateway/modem.
•Change your admin/admin password.
I've had this happen many times and once I change these 3 things never hacked again.