关于SHIRF木马的疑问

sjy 2001-08-05 05:41:06
我以前一直鼓楼挂问,以为在网上只是
浏览不会中木马和病毒。前两天有个同事
提到只浏览也会中木马,我不信。
今天看了电脑报,其中网络安全版有
片文章-恶议代码与网络安全--木马篇
分析了一个可以通过浏览传播的木马。
www.shirf.(this should be 51.)net,假如大家
用的是IE5,安全为中的话(不关ACTIVEX事),就可以传播,
用的是MIME的漏洞。这文章写得挺详细
,不由得我不信。不过我一向是怀疑主义者。
我按报纸的做法DOWN了他的WINCFG.EML,
对比了一下,确有可疑之处。
据说中了后,REGISTER 的RUN里会有
WINCFG.exe(就是以下的代码经BASE64编译成的,利用了WINDOWS MIME的漏洞),

我没有尝试,但我相信这东西是有杀伤力的,至少帮
AUTOEXEC。BAT加一句DELTREE *。*还是OK的(BUT IT IS SAID
THAT THIS HORSE JUST DO SOME OICQ INFORM AND FILE TRANSER FUNCTION。。。)
小弟胆小,请大胆人帮验证一下。

you can down source from (http://shirf.(this should be 51.)net/wincfg.eml)
using netants.or you want to see the detail,you can buy a 2001.7.30's
cpcw)

From: "xxx" <xxxx@xxx.xxx>
To: "xxx" <xxxx@xxx.xxx>
Subject: xxxx
Date: Tue, 7 Apr 2001 15:16:57 +800
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--1

这个“木马”只有6K,我觉得6K的程序对于病毒就比较大了,
有小陈当年写CIH的注释为证:
; *==========================================================================*
; * v1.3 1. modify the bug that winzip self-extractor occurs error. *
; * so when open winzip self-extractor ==> don't infect it. *
; * 05/24/1998 2. the virus "basic" size is 1010 bytes. *
; *==========================================================================*
; * v1.4 1. full modify the bug : winzip self-extractor occurs error. *
; * 2. change the date of killing computers. *
; * 05/31/1998 3. modify virus version copyright. *
; * 4. the virus "basic" size is 1019 bytes. *
; ****************************************************************************
但对于木马来说好象又不能干什么,以前看BO2000的SOURCE,
光用来实现服务器端与客户端的TCP/IP连接已用了几百行程序,
编译出来的东西象个应用程序那么大。所以我对这个木马的FTP,OICQ
能力有点怀疑。
但如果这个木马能搞一个EXE在你的电脑里运行的话,它就能够传播CIH之类的病毒,
但我以前一直没有听说过任何人在这方面的警告,如果这是真的,恐怕也轮不
到我来发现。所以这就是我对这个问题的怀疑之处,但我不希望有这种东西存在
在互联网上,这会打击我上网的乐趣。

最后问一下,有没有人知道有什么信得过的地方可以DOWN些防火墙之类的东西,
帮介绍一下。不过我觉得PC防火增防木马可以,防最新的病毒恐怕有点困难。
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alphapaopao 2001-08-05
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那是IE的漏洞,IE没有正确区别多媒体数据和可执行代码,就去WinExec(),呵呵,于是就死菜乐
ssh_zy 2001-08-05
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我也看了电脑报,也down过,没事,删了就没事了
(其实说不定你已经一不小心运行了)

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