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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; "> <TITLE>鳥哥的 Linux 私房菜 -- Nimda 病毒偵測</TITLE> <META NAME="GENERATOR" CONTENT="WPS Office Storm Beta 1.0 (Win32)"> <META NAME="AUTHOR" CONTENT="VBird"> <META NAME="CREATED" CONTENT="20051210;17373031"> <META NAME="CHANGED" CONTENT="20051210;17394014"> <META NAME="Microsoft Theme" CONTENT="strart 101"> <META NAME="Microsoft Border" CONTENT="none, default"></HEAD><BODY LANG="zh-CN" BACKGROUND="http://linux.vbird.org/VBirdLinux.jpg" DIR="LTR"><P ALIGN=CENTER STYLE="margin-bottom: 0cm"><FONT COLOR="#3333ff"><B><FONT FACE="SimSun" SIZE="5">鸟哥的</FONT></B><SPAN LANG="en-US"><FONT FACE="Tahoma, serif"><B><FONT FACE="Times New Roman, Times" SIZE="5">Linux </FONT></B></FONT></SPAN><B><FONT FACE="SimSun" SIZE="5">与</FONT></B><SPAN LANG="en-US"><FONT FACE="Tahoma, serif"><B><FONT FACE="Times New Roman, Times" SIZE="5">ADSL </FONT></B></FONT></SPAN><B><FONT FACE="SimSun" SIZE="5">私房菜</FONT></B></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><BR><A HREF="http://linux.vbird.org/" TARGET="_top"><IMG SRC="http://linux.vbird.org/VBirdTitle2.jpg" NAME="图形1" ALIGN=BOTTOM WIDTH=90 HEIGHT=25 BORDER=0></A><A HREF="http://linux.vbird.org/linux_basic"><IMG SRC="http://linux.vbird.org/icon_system.gif" NAME="图形2" ALIGN=BOTTOM WIDTH=90 HEIGHT=25 BORDER=0></A><A HREF="http://linux.vbird.org/linux_server"><IMG SRC="http://linux.vbird.org/icon_server.gif" NAME="图形3" ALIGN=BOTTOM WIDTH=90 HEIGHT=25 BORDER=0></A><A HREF="http://linux.vbird.org/linux_security"><IMG SRC="http://linux.vbird.org/icon_security.jpg" NAME="图形4" ALIGN=BOTTOM WIDTH=90 HEIGHT=25 BORDER=0></A><A HREF="http://phorum.vbird.org/" TARGET="_blank"><IMG SRC="http://linux.vbird.org/icon_forums.gif" NAME="图形5" ALIGN=BOTTOM WIDTH=90 HEIGHT=25 BORDER=0></A><A HREF="http://linux.vbird.org/adsl"><IMG SRC="http://linux.vbird.org/icon_adsl.gif" NAME="图形6" ALIGN=BOTTOM WIDTH=90 HEIGHT=25 BORDER=0></A></SPAN></FONT></P><HR><P><FONT COLOR="#3333ff"><FONT FACE="SimSun" SIZE="5">检测</FONT><SPAN LANG="en-US"><FONT SIZE=5 FACE="Tahoma, serif"><FONT FACE="SimSun"></FONT><FONT FACE="Times New Roman Baltic">Nimda</FONT> </FONT></SPAN><FONT FACE="SimSun" SIZE="5">文档</FONT></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"></SPAN></FONT></P><P STYLE="margin-bottom: 0cm"><A HREF="02nimdaweb_1/index.html"><FONT COLOR="#000000" FACE="Times New Roman Baltic">实例一：</FONT></A><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><BR></SPAN></FONT><A HREF="02nimdaweb_2/index.html"><FONT COLOR="#000000" FACE="Times New Roman Baltic">实例二：</FONT></A><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"></SPAN></FONT></P><P ALIGN=RIGHT STYLE="margin-bottom: 0cm"><FONT COLOR="#3333ff"><FONT FACE="SimSun" SIZE="2">最近更新日期：</FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT FACE="SimSun" SIZE="2">2001/09/20</FONT></SPAN></FONT></FONT></P><HR><P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><BR></SPAN></FONT><FONT COLOR="#3333ff"><FONT SIZE=4>上周（</FONT><SPAN LANG="en-US"><FONT SIZE=4 FACE="Tahoma, serif">2001/09/13</FONT></SPAN><FONT SIZE=4>）才刚刚发布的</FONT><SPAN LANG="en-US"><FONT SIZE=4 FACE="Tahoma, serif">Nimda </FONT></SPAN><FONT SIZE=4>（妠坦病虫）在</FONT><SPAN LANG="en-US"><FONT SIZE=4 FACE="Tahoma, serif">RedHat </FONT></SPAN><FONT SIZE=4>下的检测方法</FONT></FONT><FONT SIZE=4>：</FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"></SPAN></FONT></P><UL> <P><FONT COLOR="#000099" FACE="Times New Roman Baltic">前言：</FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT><FONT COLOR="#000000"><FONT FACE="Times New Roman Baltic">这只病虫对于</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Linux </FONT></SPAN><FONT FACE="Times New Roman Baltic">并不会有危害，但是对于微软的窗口（尤其是</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> windows2000 </FONT></SPAN><FONT FACE="Times New Roman Baltic">服务器）则攻击得很凶，甚至于比</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Code Red </FONT></SPAN><FONT FACE="Times New Roman Baltic">还要来得凶！尤其他的扩散管道非常的多，除了常使用的邮件传送之外，亦可经由</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> WWW </FONT></SPAN><FONT FACE="Times New Roman Baltic">服务器的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> port 80 </FONT></SPAN><FONT FACE="Times New Roman Baltic">来传播，此外，亦可以经由『网络上的芳邻』（资源分享）来传播病毒！真是可怕！</FONT></FONT></P></UL><UL> <P STYLE="margin-bottom: 0cm"> <FONT COLOR="#000099" FACE="Times New Roman Baltic">入侵方向与分析原理：</FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT><FONT COLOR="#000000"><FONT FACE="Times New Roman Baltic">由于</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Nimda </FONT></SPAN><FONT FACE="Times New Roman Baltic">可以经由三重管道传播病毒，我们并无法得知他经由『网芳』传播的情况（其实还是可以的，只要分析</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> SAMBA </FONT></SPAN><FONT FACE="Times New Roman Baltic">服务器的登录档就可以知道连上线的用户端情况了！），因此以下仍然是以</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> WWW </FONT></SPAN><FONT FACE="Times New Roman Baltic">服务器的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> port 80 </FONT></SPAN><FONT FACE="Times New Roman Baltic">作为检测的方向。</FONT></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT><FONT COLOR="#000000" FACE="Times New Roman Baltic"> </FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT><FONT COLOR="#000000"><FONT FACE="Times New Roman Baltic">在</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> WWW </FONT></SPAN><FONT FACE="Times New Roman Baltic">服务器方面，基本上，与</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Code Red </FONT></SPAN><FONT FACE="Times New Roman Baltic">相同的，</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> <FONT COLOR="#3333ff">Nimda </FONT> </FONT></SPAN></FONT><FONT COLOR="#3333ff"><FONT FACE="Times New Roman Baltic">是以微软的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> WWW Server </FONT></SPAN><FONT FACE="Times New Roman Baltic">的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> port 80 </FONT></SPAN><FONT FACE="Times New Roman Baltic">侵入服务器的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> WWW </FONT></SPAN><FONT FACE="Times New Roman Baltic">服务</FONT></FONT><FONT COLOR="#000000" FACE="Times New Roman Baltic">，然后再进行破坏行为。当</FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic" COLOR="#000000"> Nimda </FONT></SPAN></FONT><FONT COLOR="#000000"><FONT FACE="Times New Roman Baltic">尝试侵入</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Linux </FONT></SPAN><FONT FACE="Times New Roman Baltic">的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> port 80 </FONT></SPAN><FONT FACE="Times New Roman Baltic">时，就会被档下来（因为没有</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Nimda </FONT></SPAN><FONT FACE="Times New Roman Baltic">缺省要入侵的文件系统），而在</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Linux </FONT></SPAN><FONT FACE="Times New Roman Baltic">的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Apache </FONT></SPAN><FONT FACE="Times New Roman Baltic">登录档上面就会有纪录，亦即在你的</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> WWW </FONT></SPAN><FONT FACE="Times New Roman Baltic">网页登录档（应该是在</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> <FONT COLOR="#000099">/usr/local/apache/logs/access_log</FONT> </FONT></SPAN><FONT FACE="Times New Roman Baltic">这个文件）留下记录，这个文件的内容有点象这样：</FONT></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT> <FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </P> <TABLE COLS=1 WIDTH=90% CELLPADDING=2 CELLSPACING=2 BGCOLOR="#000000"> <TR> <TD> <FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <FONT COLOR="#ffffff" FACE="SimSun" SIZE="2">61.224.44.98 - - [17/Sep/2001:15:43:28 +0800] "GET /~vbird/linux_live/index.php HTTP/1.0" 200 893</FONT> <BR><FONT COLOR="#ffffff" FACE="SimSun" SIZE="2">211.74.244.91 - - [17/Sep/2001:15:43:28 +0800] "GET /~vbird/linux_live/index.php HTTP/1.1" 200 905</FONT> <BR><FONT COLOR="#ffffff" FACE="SimSun" SIZE="2">211.74.210.189 - - [17/Sep/2001:15:43:29 +0800] "GET /~vbird/linux_live/index.php HTTP/1.1" 200 905</FONT> <BR><FONT COLOR="#ffff00" FACE="SimSun" SIZE="2">140.116.44.156 - - [19/Sep/2001:10:36:30 +0800] "GET /scripts/root.exe?/c+dir HTTP/1.0" 404 287</FONT> <BR><FONT COLOR="#ffff00" FACE="SimSun" SIZE="2">140.116.44.156 - - [19/Sep/2001:10:36:30 +0800] "GET /MSADC/root.exe?/c+dir HTTP/1.0" 404 285</FONT> <BR> <FONT COLOR="#ffff00" FACE="SimSun" SIZE="2">140.116.44.156 - - [19/Sep/2001:10:36:30 +0800] "GET /c/winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 295</FONT> <BR><FONT COLOR="#ffff00" FACE="SimSun" SIZE="2">140.116.44.156 - - [19/Sep/2001:10:36:30 +0800] "GET /d/winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 295</FONT> <BR><FONT COLOR="#ffff00" FACE="SimSun" SIZE="2">140.116.44.156 - - [19/Sep/2001:10:36:30 +0800] "GET /scripts/..%255c../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 309</FONT> <BR><FONT COLOR="#ffff00" FACE="SimSun" SIZE="2">140.116.44.156 - - [19/Sep/2001:10:36:30 +0800] "GET /_vti_bin/..%255c../..%255c../..%255c../winnt/system32/cmd.exe?/c+dir TTP/1.0" 404 326</FONT></SPAN></FONT></TD> </TR> </TABLE> <P><FONT COLOR="#000000"> </FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT><FONT COLOR="#000000">象上面这个例子中，第一行中，<SPAN LANG="en-US"><FONT FACE="Tahoma, serif">61.224.44.98 </FONT></SPAN>指的是使用你<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> WWW </FONT></SPAN>服务器的主机名称，后面接的是注册的日期，然后<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> GET </FONT></SPAN>后面接的是<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> WWW </FONT></SPAN>服务器传送的文件，而在</FONT><FONT COLOR="#3333ff">黄色的部分则是当<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> Nimda </FONT></SPAN>尝试注册你的<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> WWW </FONT></SPAN>服务器时，由于系统不是<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> Windows2000 </FONT></SPAN>所以会显示的错误信息</FONT><FONT COLOR="#000000">！（<SPAN LANG="en-US"><FONT FACE="Tahoma, serif">Nimda </FONT></SPAN>在一次的尝试登录中，就会有差不多<SPAN LANG="en-US"><FONT FACE="Tahoma, serif">15</FONT></SPAN>行的错误信息出现），因此，我们只要分析登录档（<SPAN LANG="en-US"><FONT FACE="Tahoma, serif">access_log</FONT></SPAN>）就可以知道哪一个<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> IP </FONT></SPAN>已经中毒了！（就是看前面的<SPAN LANG="en-US"><FONT FACE="Tahoma, serif"> IP </FONT></SPAN>罗）</FONT></P></UL><UL> <P STYLE="margin-bottom: 0cm"><FONT FACE="Times New Roman Baltic"><FONT COLOR="#000099">病虫的危害性质</FONT><FONT COLOR="#000000">：</FONT></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT><FONT COLOR="#000000"><FONT FACE="Times New Roman Baltic">在已经公布的数据中，</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic"> Nimda </FONT></SPAN><FONT FACE="Times New Roman Baltic">的危害程度与性质你可以到下面的网页中查询道：</FONT></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </P> <UL> <LI><P STYLE="margin-bottom: 0cm"><FONT COLOR="#000000"><A HREF="http://w5.dj.net.tw/~ggreat/hot/Nimda.htm" TARGET="_blank"><FONT FACE="Times New Roman Baltic">金帅（</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic">ZLock</FONT></SPAN><FONT FACE="Times New Roman Baltic">）防毒中心</FONT></A><FONT FACE="Times New Roman Baltic">；</FONT></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </P> <LI><P STYLE="margin-bottom: 0cm"><FONT COLOR="#000000"><A HREF="http://www.trend.com.tw/endusers/presscenter/20010919.htm" TARGET="_blank"><FONT FACE="Times New Roman Baltic">趋势（</FONT><SPAN LANG="en-US"><FONT FACE="Times New Roman Baltic">Trend</FONT></SPAN><FONT FACE="Times New Roman Baltic">）</FONT></A><FONT FACE="Times New Roman Baltic">；<A HREF="http://www.trend.com.tw/EncyclopediaV2/vinfo/virusencyclo/blacklist.htm" TARGET="_blank">趋势二（</A></FONT><SPAN LANG="en-US"><FONT FACE="Tahoma, serif"><A HREF="http://www.trend.com.tw/EncyclopediaV2/vinfo/virusencyclo/blacklist.htm" TARGET="_blank"><FONT FACE="Times New Roman Baltic">Trend</FONT></A></FONT></SPAN><A HREF="http://www.trend.com.tw/EncyclopediaV2/vinfo/virusencyclo/blacklist.htm" TARGET="_blank"><FONT FACE="Times New Roman Baltic">）</FONT></A></FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT>⌨️ 快捷键说明
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