Recently we see lots of PHP exploits (over 2000 known) affecting older versions of hosted software…
An example found here: htxp://62.122.73.203/errdiag.php?tm=48 (requests for)
See:
http://www.threatexpert.com/report.aspx?md5=b33acde8cebd78954efd3f73ef23a883
http://www.threatexpert.com/report.aspx?md5=03a8aebfe7280a9de0a9986b56b82ade
http://www.threatexpert.com/report.aspx?md5=492c09560ddfff96d77235a25fdfa130
polonus