I've recently noticed repetitive attacks from various Russian IP addresses that are trying to access the files "easyboard.php" and "sign.php" on my websites. There are no links to these files on my site, and they do not exist. I am assuming that a vulnerability was discovered in that PHP software (it's a bulletin board script), and that hackers are trying to take advantage of that by randomly accessing websites with the hope that some of them have installed the software. Please be warned.
I wonder if it's this guest book? Spaced to avoid live link... h t t p : //www. onlinetools .org/tools/easyboard.php