今天上网，输入
www.google.cn，结果网页跳转到一个类似与百度的页面，但是网址却写的是
www.yahoo.com.cn，从页面上看，绝对不是百度的网页，但是奇怪的是可以进行搜索。ping了之后发现三个网站都来之于同一个IP地址：
219.235.3.16。这肯定是中了病毒或者木马之类的东西了，结果在电脑里面找了半天，查找到了一个名为host的文件
该文件在system32/drives/etc目录下。打开host之后，里面的内容是：
127.0.0.1 localhost
219.235.3.16 search.114.vnet.cn
219.235.3.16 keyword.vnet.cn
219.235.3.16 auto.search.msn.com
219.235.3.16 search.msn.com
219.235.3.16 cnweb.search.live.com
219.235.3.16 www.360safe.com
219.235.3.16 www.k369.com
219.235.3.16 www.5566.net
219.235.3.16 360safe.com
202.165.102.243 update.360safe.com
219.235.3.16 dl.360safe.com
219.235.3.16 down.360safe.com
219.235.3.16 bbs.360safe.com
219.235.3.16 kaba.360safe.com
219.235.3.16 baike.360safe.com
219.235.3.16 www.360.cn
219.235.3.16 360.cn
219.235.3.16 wopti.360.cn
202.165.102.243 update.360.cn
219.235.3.16 dl.360.cn
219.235.3.16 down.360.cn
219.235.3.16 bbs.360.cn
219.235.3.16 kaba.360.cn
219.235.3.16 baike.360.cn
219.235.3.16 360.qihoo.com
219.235.3.16 360safe.qihoo.com
219.235.3.16 forum.ikaka.com
219.235.3.16 www.ikaka.com
202.165.102.243 update.ikaka.com
219.235.3.16 forum.jiangmin.com
202.165.102.243 update.jiangmin.com
219.235.3.16 tieba.baidu.com
219.235.3.16 post.baidu.com
219.235.3.16 zhidao.baidu.com
219.235.3.16 www.baidu.com
202.165.102.243 update.rising.com.cn
219.235.3.16 online.rising.com.cn
202.165.102.243 center.rising.com.cn
219.235.3.16 up.duba.net
219.235.3.16 vi.duba.net
219.235.3.16 shadu.baidu.com
219.235.3.16 du.baidu.com
219.235.3.16 security.symantec.com
219.235.3.16 shadu.duba.net
219.235.3.16 bbs.duba.net
219.235.3.16 www.duba.net
219.235.3.16 online.jiangmin.com
219.235.3.16 cn.mcafee.com
219.235.3.16 www.ahn.com.cn
219.235.3.16 www.kaspersky.com.cn
219.235.3.16 www.pcav.cn
219.235.3.16 www.luosoft.com
219.235.3.16 www.im286.com
219.235.3.16 an.baidu.com
219.235.3.16 ma.baidu.com
219.235.3.16 bbs.htmlman.net
202.165.102.243 download.rising.com.cn
202.165.102.243 rsup08.rising.com.cn
219.235.3.16 10000.286er.com
219.235.3.16 im286.net
219.235.3.16 ju.qihoo.com
219.235.3.16 bbs.chinaz.com
219.235.3.16 www.qihoo.com
202.165.102.243 dnl-cn1.kaspersky-labs.com
202.165.102.243 dnl-cn2.kaspersky-labs.com
202.165.102.243 dnl-cn3.kaspersky-labs.com
202.165.102.243 dnl-cn4.kaspersky-labs.com
202.165.102.243 dnl-cn5.kaspersky-labs.com
202.165.102.243 dnl-cn6.kaspersky-labs.com
202.165.102.243 dnl-cn7.kaspersky-labs.com
202.165.102.243 dnl-cn8.kaspersky-labs.com
202.165.102.243 dnl-cn9.kaspersky-labs.com
202.165.102.243 dnl-cn10.kaspersky-labs.com
202.165.102.243 dnl-cn11.kaspersky-labs.com
202.165.102.243 dnl-cn12.kaspersky-labs.com
202.165.102.243 dnl-cn13.kaspersky-labs.com
202.165.102.243 dnl-cn14.kaspersky-labs.com
202.165.102.243 dnl-cn15.kaspersky-labs.com
202.165.102.243 dnl-eu1.kaspersky-labs.com
202.165.102.243 dnl-eu2.kaspersky-labs.com
202.165.102.243 dnl-eu3.kaspersky-labs.com
202.165.102.243 dnl-eu4.kaspersky-labs.com
202.165.102.243 dnl-eu5.kaspersky-labs.com
202.165.102.243 dnl-eu6.kaspersky-labs.com
202.165.102.243 dnl-eu7.kaspersky-labs.com
202.165.102.243 dnl-eu8.kaspersky-labs.com
202.165.102.243 dnl-eu9.kaspersky-labs.com
202.165.102.243 dnl-eu10.kaspersky-labs.com
202.165.102.243 dnl-eu11.kaspersky-labs.com
202.165.102.243 dnl-eu12.kaspersky-labs.com
202.165.102.243 dnl-eu13.kaspersky-labs.com
202.165.102.243 dnl-eu14.kaspersky-labs.com
202.165.102.243 dnl-eu15.kaspersky-labs.com
202.165.102.243 dnl-us1.kaspersky-labs.com
202.165.102.243 dnl-us2.kaspersky-labs.com
202.165.102.243 dnl-us3.kaspersky-labs.com
202.165.102.243 dnl-us4.kaspersky-labs.com
202.165.102.243 dnl-us5.kaspersky-labs.com
202.165.102.243 dnl-us6.kaspersky-labs.com
202.165.102.243 dnl-us7.kaspersky-labs.com
202.165.102.243 dnl-us8.kaspersky-labs.com
202.165.102.243 dnl-us9.kaspersky-labs.com
202.165.102.243 dnl-us10.kaspersky-labs.com
202.165.102.243 dnl-us11.kaspersky-labs.com
202.165.102.243 dnl-us12.kaspersky-labs.com
202.165.102.243 dnl-us13.kaspersky-labs.com
202.165.102.243 dnl-us14.kaspersky-labs.com
202.165.102.243 dnl-us15.kaspersky-labs.com
202.165.102.243 dnl-ru1.kaspersky-labs.com
202.165.102.243 dnl-ru2.kaspersky-labs.com
202.165.102.243 dnl-ru3.kaspersky-labs.com
202.165.102.243 dnl-ru4.kaspersky-labs.com
202.165.102.243 dnl-ru5.kaspersky-labs.com
202.165.102.243 dnl-ru6.kaspersky-labs.com
202.165.102.243 dnl-ru7.kaspersky-labs.com
202.165.102.243 dnl-ru8.kaspersky-labs.com
202.165.102.243 dnl-ru9.kaspersky-labs.com
202.165.102.243 dnl-ru10.kaspersky-labs.com
202.165.102.243 dnl-ru11.kaspersky-labs.com
202.165.102.243 dnl-ru12.kaspersky-labs.com
202.165.102.243 dnl-ru13.kaspersky-labs.com
202.165.102.243 dnl-ru14.kaspersky-labs.com
202.165.102.243 dnl-ru15.kaspersky-labs.com
202.165.102.243 dnl-jp1.kaspersky-labs.com
202.165.102.243 dnl-jp2.kaspersky-labs.com
202.165.102.243 dnl-jp3.kaspersky-labs.com
202.165.102.243 dnl-jp4.kaspersky-labs.com
202.165.102.243 dnl-jp5.kaspersky-labs.com
202.165.102.243 dnl-jp6.kaspersky-labs.com
202.165.102.243 dnl-jp7.kaspersky-labs.com
202.165.102.243 dnl-jp8.kaspersky-labs.com
202.165.102.243 dnl-jp9.kaspersky-labs.com
202.165.102.243 dnl-jp10.kaspersky-labs.com
202.165.102.243 dnl-jp11.kaspersky-labs.com
202.165.102.243 dnl-jp12.kaspersky-labs.com
202.165.102.243 dnl-jp13.kaspersky-labs.com
202.165.102.243 dnl-jp14.kaspersky-labs.com
202.165.102.243 dnl-jp15.kaspersky-labs.com
202.165.102.243 dnl-kr1.kaspersky-labs.com
202.165.102.243 dnl-kr2.kaspersky-labs.com
202.165.102.243 dnl-kr3.kaspersky-labs.com
202.165.102.243 dnl-kr4.kaspersky-labs.com
202.165.102.243 dnl-kr5.kaspersky-labs.com
202.165.102.243 dnl-kr6.kaspersky-labs.com
202.165.102.243 dnl-kr7.kaspersky-labs.com
202.165.102.243 dnl-kr8.kaspersky-labs.com
202.165.102.243 dnl-kr9.kaspersky-labs.com
202.165.102.243 dnl-kr10.kaspersky-labs.com
202.165.102.243 dnl-kr11.kaspersky-labs.com
202.165.102.243 dnl-kr12.kaspersky-labs.com
202.165.102.243 dnl-kr13.kaspersky-labs.com
202.165.102.243 dnl-kr14.kaspersky-labs.com
202.165.102.243 dnl-kr15.kaspersky-labs.com
202.165.102.243 dnl-cd1.kaspersky-labs.com
202.165.102.243 dnl-cd2.kaspersky-labs.com
202.165.102.243 dnl-cd3.kaspersky-labs.com
202.165.102.243 dnl-cd4.kaspersky-labs.com
202.165.102.243 dnl-cd5.kaspersky-labs.com
202.165.102.243 dnl-cd6.kaspersky-labs.com
202.165.102.243 dnl-cd7.kaspersky-labs.com
202.165.102.243 dnl-cd8.kaspersky-labs.com
202.165.102.243 dnl-cd9.kaspersky-labs.com
202.165.102.243 dnl-cd10.kaspersky-labs.com
202.165.102.243 dnl-cd11.kaspersky-labs.com
202.165.102.243 dnl-cd12.kaspersky-labs.com
202.165.102.243 dnl-cd13.kaspersky-labs.com
202.165.102.243 dnl-cd14.kaspersky-labs.com
202.165.102.243 dnl-cd15.kaspersky-labs.com
202.165.102.243 downloads1.kaspersky-labs.com
202.165.102.243 downloads2.kaspersky-labs.com
202.165.102.243 downloads3.kaspersky-labs.com
202.165.102.243 downloads4.kaspersky-labs.com
202.165.102.243 downloads5.kaspersky-labs.com
219.235.3.16 rss.360safe.com
219.235.3.16 x.360safe.com
219.235.3.16 d.360safe.com
219.235.3.16 updatem.360safe.com
219.235.3.16 softm.360safe.com
219.235.3.16 ishare.sina.com.cn
219.235.3.16 search.cn.yahoo.com
219.235.3.16 www.google.com
219.235.3.16 google.com
219.235.3.16 www.google.cn
219.235.3.16 www.yahoo.com.cn
219.235.3.16 cn.yahoo.com
219.235.3.16 search.tom.com
219.235.3.16 zhuansha.duba.net
219.235.3.16 buy.duba.net
219.235.3.16 kad.www.duba.net
219.235.3.16 cu001.www.duba.net
219.235.3.16 cu002.www.duba.net
219.235.3.16 cu003.www.duba.net
219.235.3.16 cu004.www.duba.net
219.235.3.16 cu005.www.duba.net
219.235.3.16 cu010.www.duba.net
219.235.3.16 client.download.duba.net
219.235.3.16 page.so.163.com
219.235.3.16 www.soso.com
219.235.3.16 sou.china.com
219.235.3.16 test.591jx.com
219.235.3.16 a.topxxxx.cn
219.235.3.16 picon.chinaren.com
219.235.3.16 www.5566.net
127.0.0.1 p.qqkx.com
127.0.0.1 news.netandtv.com
127.0.0.1 z.neter888.cn
127.0.0.1 b.myblank.cn
127.0.0.1 wvw.wokutu.com
127.0.0.1 unionch.qyule.com
127.0.0.1 www.qyule.com
127.0.0.1 it.itjc.cn
127.0.0.1 www.linkwww.com
127.0.0.1 vod.kaicn.com
127.0.0.1 www.tx8688.com
127.0.0.1 b.neter888.cn
127.0.0.1 promote.huanqiu.com
127.0.0.1 www.huanqiu.com
127.0.0.1 www.haokanla.com
127.0.0.1 play.unionsky.cn
127.0.0.1 www.52v.com
127.0.0.1 www.gghka.cn
127.0.0.1 icon.ajiang.net
127.0.0.1 new.ete.cn
127.0.0.1 www.stiae.cn
127.0.0.1 o.neter888.cn
127.0.0.1 comm.jinti.com
127.0.0.1 www.google-analytics.com
127.0.0.1 hz.mmstat.com
127.0.0.1 www.game175.cn
127.0.0.1 x.neter888.cn
127.0.0.1 z.neter888.cn
127.0.0.1 p.etimes888.com
127.0.0.1 hx.etimes888.com
127.0.0.1 abc.qqkx.com
127.0.0.1 dm.popdm.cn
127.0.0.1 www.yl9999.com
127.0.0.1 www.dajiadoushe.cn
127.0.0.1 down.nihao29.cn
127.0.0.1 v.onondown.com.cn
127.0.0.1 www.interoo.net
127.0.0.1 bally1.bally-bally.net
127.0.0.1 www.bao5605509.cn
127.0.0.1 down.nihao29.cn
127.0.0.1 www.mzd020.cn
127.0.0.1 jzm015.cn
127.0.0.1 down.hs7yue.cn
127.0.0.1 new.doups.cn
127.0.0.1 w.qq-uc.cn
127.0.0.1 down.nihao69.cn
127.0.0.1 www.rty456.cn
127.0.0.1 www.werqwer.cn
127.0.0.1 1.360-1.cn
127.0.0.1 user1.23-16.net
127.0.0.1 www.guccia.net
127.0.0.1 www.interoo.net
127.0.0.1 upa.netsool.net
127.0.0.1 js.users.51.la
127.0.0.1 vip2.51.la
127.0.0.1 web.51.la
127.0.0.1 qq.gong2008.com
127.0.0.1 2008tl.copyip.com
127.0.0.1 tla.laozihuolaile.cn
127.0.0.1 www.tx6868.cn
127.0.0.1 p001.tiloaiai.com
127.0.0.1 s1.tl8tl.com
127.0.0.1 s1.gong2008.com
删除了该文件之后，结果IE正常。但是我怀疑应该有exe或者dll文件存在在电脑里面，因为IE来读取这个文件，而且ping命令也是读取这个文件，但是查找半天都没有找到。希望大家有谁遇到过类似的问题，帮我解决一下。谢谢了。
不知道大家对这个原理了解吗？可以探讨一下！