Hi. Over the past week I've suddenly starting having an issue where I get an alert about CPU usage over my threshold. Sure enough, something is cranking up the CPU usage to 100% (sometimes more, however that's possible...) and it stays that way for hours unless I kill the process. The process is different every time, not only in its PID of course, but the name too. This last time it was named phpoRfrE2_ippme. It's always "php" followed by some numbers and _ippme.
I run several WordPress sites, and everything's fully up to date, and nothing looks hacked. I don't get a lot of traffic either. I have also scoured my logs for details as to what is hitting the sites at that time (of course, I have no idea which one it might be). The only oddity is beging bombarded by requests from something call BUbiNG (no relation to Bing crawler), which gives a source URL of http://law.di.unimi.it/BUbiNG.html
, and which appears to be a perfectly legit crawler from Italy. I am going to exclude it in my robots file, and see if that fixes the problem.
But my main questions are: why would that be causing a problem? and has anyone else had this problem? And what is php(random)_ippme? My Google-Fu is not turning up anything.