Hi,
Yes, I had five sites hacked by Anonboy. He’d accessed the server through insecure passwords (not mine) and proceeded to hack other WP sites on the same server. All my plugins and versions of WP were up-to-date.
The solution I found was to get my hosting company to reinstate the sites from their most recent backups (from a few days before). Some of these versions had been hacked but the hacking hadn’t taken full hold so they were able to strip out the bad code and restore the sites (apart from some widgets which I had to reinstate).
I then went into all my sites and changed the passwords and installed the ‘disable comments’ plugin – apparently Anonboy gains access to the database by going through comments.
Anonboy’s IP address is in Singapore. Not sure how he gets off on this but he clearly thinks he’s cool.
Good luck.