CWP hacked, how to change password and recover access using SSH

[peugeot]

Hi,
I hope somebody can help me.
My VPS which I run with CWP has been hacked, websites and tracking systems destroyed.
The hacker has also disabled my password, so I can not gain access to CWP admin.
I did have backups enabled in the CWP Admin panel.
Is there a way to restore backups using SSH?
Alternatively, I tried changing password using SSH, but I get this error after "retype new password"
"Authentication token manipulation error", so the new password is not accepted.
Please help

[Sandeep]

if core files are changed you need to reinstall the OS, ***take backups

[become]

Do U have idea how it could be hacked ?
From CWP or direct from easy password