I can't find any mention of the name of this "Network Trojan" or anything about it.
None of our servers run PHP (Nessus credentialed check confirms), so I'm not terribly worried about it... but I do like to know what's going on with this sort of thing, at least in a general sense.
Is it really Plesk and/or Suhosin related? I see where there was an 0-Day not long ago in Plesk. Not being much of a PHP guy, are those really in that many installations to warrant a trojan that scans the interwebs?