File: joxch.dll
Size: 46402 bytes
Modified: 2007年11月3日, 19:29:40
MD5: 3DADA7B474F73E3AE678E5703702DED2
SHA1: 70B12CEE9C970C304816B2A540A0C8C6FE1A79A3
CRC32: 43E49F82
AV命名：Trojan.Win32.Agent.ckw（卡巴）

技术细节：
1.该病毒为一个dll文件，通过rundll32加载后，释放如下副本
%systemroot%\system32\wk.rft
搜索注册表中相关键值找到QQ安装文件夹，在QQ目录下面释放q.dll文件

2.在HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System下面添加
键值项Disabecmd 数据为0x00000001 屏蔽cmd

3.创建如下注册表项目达到开机启动的目的：
HKLM\SOFTWARE\Classes\CLSID\{19191919-9191-6e6e-2a2a-919191919191}\InprocServer32\: "%systemroot%\system32\wk.rft"

4.在HKLM\SOFTWARE\下面创建yh的子键 并写入病毒的版本信息

5.监控如下进程或者阻止如下dll加载，如果发现立即结束并将其文件删除
mmskskin.dll
KKClean.dll
VirUnk.def
AntiActi.dll
Rsaupd.exe
Iereset.dll
Libclsid.dat
KNetWch.SYS
CleanHis.dll
WoptiClean.sys
kakalib.def
libdll.dat
kkinst.ini
KASearch.DLL
KAVBootC.sys
Ras.exe
iehelp.exe
trojandetector.exe
KAConfig.DLL
KAVPassp.DLL
hsfw.dll
wopticlean

并且通过查找子窗口查找如下字符，如果找到则将其进程结束并删除对应文件
Smallforgs
Kingsoft
Antivirus
Kingsoft Antispyware
TrojanDetector
Duba
Micropoint

被删除文件被移动到%temp%文件夹下，并命名为_*.TMP

6.修改hosts文件屏蔽常见安全网站和一些大型网站或带毒网站
61.152.244.167 search.114.vnet.cn
61.152.244.167 keyword.vnet.cn
61.152.244.167 auto.search.msn.com
61.152.244.167 search.msn.com
61.152.244.167 cnweb.search.live.com
61.152.244.167    www.hao123.com
61.152.244.167    hao123.com
61.152.244.167    www.360safe.com
61.152.244.167    360safe.com
222.73.126.115    update.360safe.com
61.152.244.167    dl.360safe.com
61.152.244.167    bbs.360safe.com
61.152.244.167    www.btbaicai.com
61.152.244.167    btbaicai.com
61.152.244.167    www.pctutu.com
61.152.244.167    www.7322.com
61.152.244.167    www.5566.net
61.152.244.167    www.9991.com
61.152.244.167    9991.com
61.152.244.167    forum.ikaka.com
61.152.244.167    www.ikaka.com
222.73.126.115    update.ikaka.com
61.152.244.167    forum.jiangmin.com
222.73.126.115    update.jiangmin.com
61.152.244.167    post.baidu.com
222.73.126.115    update.rising.com.cn
61.152.244.167    online.rising.com.cn
222.73.126.115    center.rising.com.cn  
61.152.244.167    up.duba.net
61.152.244.167    bbs.duba.net
61.152.244.167    shadu.baidu.com
61.152.244.167    security.symantec.com
61.152.244.167    shadu.duba.net
61.152.244.167    zhuansha.duba.net
61.152.244.167    cu003.www.duba.net
61.152.244.167    online.jiangmin.com
61.152.244.167    cn.mcafee.com
61.152.244.167    www.ahn.com.cn
61.152.244.167    www.kaspersky.com.cn
61.152.244.167    www.pcav.cn
61.152.244.167    mopery.hits.io
61.152.244.167    www.luosoft.com
61.152.244.167    luosoft.com
61.152.244.167    www.im286.com
61.152.244.167    bbs.htmlman.net
61.152.244.167    10000.286er.com
61.152.244.167    im286.net
61.152.244.167    cool.47555.com
61.152.244.167    ju.qihoo.com
61.152.244.167    bbs.chinaz.com
61.152.244.167    www.qihoo.com
222.73.126.115 dnl-cn1.kaspersky-labs.com
(等所有卡巴斯基升级网站)
61.152.244.167    ishare.sina.com.cn
61.152.244.167    search.cn.yahoo.com
61.152.244.167    www.google.com
61.152.244.167    google.com
61.152.244.167    www.google.cn
61.152.244.167    www.sogou.com
61.152.244.167    www.yahoo.com.cn
61.152.244.167    cn.yahoo.com
222.73.210.148    www.comewz.com
61.152.244.167    search.tom.com
61.152.244.167    page.so.163.com
61.152.244.167    www.soso.com
61.152.244.167    sou.china.com
61.152.244.167   toolsbar.kuaiso.com
61.152.244.167   www.kuaiso.com

7.“黑吃黑”删除一些常见木马的加载项
HKLM\SOFTWARE\Classes\CLSID\{093FF999-1EA0-4079-9525-9614C3504B74}
HKLM\SOFTWARE\Classes\CLSID\{72C24DD5-D70A-438B-8A42-98424B88AFB8}
HKLM\SOFTWARE\Classes\CLSID\{F935DC22-1CF0-11D0-ADB9-00C04FD58A0B}

8.连接网络下载其他dll木马（但测试未发现）

解决办法：
1.下载Xdelbox(可到down.45it.com下载)

解压Xdelbox压缩包里的所有文件到一个文件夹
在 添加旁边的框中 输入
%systemroot%\system32\wk.rft
输入完以后 点击旁边的添加 按钮 被添加的文件将出现在下面的大框中
然后选中下面大框中的文件
右键单击 并点击“重启立即删除”