Trojan.Win32.Agent，该木马病毒本身是一个 Windows PE EXE 文件， 大小为91928字节。该木马会在用户不知情的情况下，自动链接到网络中下载其他恶意程序，同时该木马会尝试关闭受影响系统中的反病毒软件。

木马家族：Trojan.Win32.agent

中毒症状：运行后在系统目录system32衍生病毒文件，并通过修改注册表增加系统启动项目达到开机启动自身，从而

达到生成病毒文件的目的。

成员举例：病毒名称： Trojan-Spy.Win32.Agent.pn

病毒类型： 木马

文件 MD5： 90C9DEF19AB8A96484A12C65F697586F

文件大小： 91928 bytes

公开范围： 完全公开

危害等级： 中等

感染系统： Win2000以上系统

对照命名： Trojan.Spy.Agent.DK

行为分析：

1、一旦运行，该木马复制自身到如下目录，然后运行它的这些副本：

D:\\myplay.pif

%System%\\AlxRes061124.exe

%System%\\scrsys061124.scr

副本运行后，会释放如下文件，然后运行它们。

%System%\\winsys32_061124.dll

%System%\\scrsys16_061124.scr

%System%\\\\winsys16_061124.dll

C:\\myDelm.bat

myDelm.bat包含的内容如下：

:try

del "C:\\Documents and Settings\\Hunter\\桌面\\Trojan-Spy.Win32.Agent.pn(90C9DEF19AB8A96484A12C65F697586F).exe"

if exist "C:\\Documents and Settings\\Hunter\\桌面\\Trojan-Spy.Win32.Agent.pn(90C9DEF19AB8A96484A12C65F697586F).exe" goto try

del %0

该打包文件的运行会导致原始样本在运行后，被删除，从而增加木马的隐蔽性。

2、修改如下系统配置文件。

winsys.ini [hitpop] test = 1

winsys.ini [hitpop] first = 1

d:\\autorun.inf [autorun] open = d:\\myplay.pif

winsys.ini [hitpop] ver = 061124

winsys.ini [exe] fn = C:\\WINDOWS\\system32\\AlxRes061124.exe

winsys.ini [exe_bak] fn = C:\\WINDOWS\\system32\\scrsys061124.scr

winsys.ini [dll_hitpop] fn = C:\\WINDOWS\\system32\\winsys32_061124.dll

winsys.ini [dll_start_bak] fn = C:\\WINDOWS\\system32\\scrsys16_061124.scr

winsys.ini [dll_start] fn = C:\\WINDOWS\\system32\\winsys16_061124.dll

winsys.ini [hitpop] kv = 0

3、修改注册表键值，达到随系统启动的目的：

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon

"Userinit" = C:\\WINDOWS\\system32\\userinit.exe,rundll32.exe C:\\WINDOWS\\system32\\winsys16_061124.dll start

4、查找包含如下信息的窗体，尝试关闭这些窗体：

瑞星注册表监控提示

主动防御 信息

主动防御 警报

主动防御 警告

主动防护 提示

主动防护 警告

主动防护 警报

主动防护 信息

Kaspersky Anti-Virus: 通知

5、链接互联网，试图下载如下文件：

http://207.46.19.30/isapi/redir.dll?prd=ie&pver=6&ar=msnhome

http://208.172.13.254/

http://65.54.152.126/

http://69.108.159.61/library/dap.js

http://69.108.159.61/ads/6028/0000006028_000000000000000385411.swf?fd=www.msn.com&clickTAG=http%3A//g.msn.com/0AD00042/1023104.5.1%3F%3FPID%3D3505768%26amp%3BUIT%3DG%26amp%3BTargetID%3D1081844%26amp%3BAN%3D419629108%26amp%3BPG%3DMSNREC

http://69.108.159.61/br/hp/en-us/css/7/blu.css

http://69.108.159.61/br/hp/en-us/css/7/decoration/pipe.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/t.gif?http://stb.msn.com/i/BE/C7FA55CFA986A26FE1A325D0E2CC64.jpg

http://69.108.159.61/br/hp/en-us/css/7/decoration/t.gif?http://stb.msn.com/i/1D/E96930DEEF7EFDA819FBDC624BCBE.jpg

http://69.108.159.61/br/hp/en-us/css/7/decoration/msn_b.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/bullet.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/video.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/buttons.gif

http://207.46.216.62/c.gif?di=340&pi=7317&ps=83527&tp=http://www.msn.com/&rf=

http://207.46.216.55/c.gif?di=340&pi=7317&ps=83527&tp=http://www.msn.com/&rf=&RedC=c.msn.com&MXFR=9AD480265CF549E4BCE7D194DF92E5A5

http://63.150.153.30/br/om/js/1/s_code.js

http://207.46.216.62/c.gif?di=340&pi=7317&ps=83527&tp=http://www.msn.com/&rf=&MUID=9AD480265CF549E4BCE7D194DF92E5A5

http://128.241.21.149/b/ss/msnportalhome/1/H.1-pdv-2/s17852470343337?[AQB]&ndh=1&t=8/0/2007%204%3A28%3A6%201%20300&ns=msnportal&pageName=US%20Homepage%20V10.5&g=http%3A//www.msn.com/&cc=USD&ch=www.msn.com&server=msn.com&c1=Portal&c2=en-us&c3=10.5&c19=Dblu%2CW1%2CM5%2CF5%2CT5%2CE5%2CQ0&c22=False&c29=http%3A//www.msn.com/&s=1152x864&c=24&j=1.3&v=Y&k=Y&bw=792&bh=471&ct=lan&hp=N&[AQE]

http://65.54.194.118/ADSAdClient31.dll?GetSAd=&PG=MSN9TP&AP=1376

http://65.54.194.118/ADSAdClient31.dll?GetSAd=&PG=MSNREC&AP=1440

http://69.108.159.61/br/hp/en-us/css/7/decoration/WL.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/beta.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/search.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/msnbf.gif

http://69.108.159.61/br/hp/en-us/css/7/decoration/msft.gif

http://65.54.195.185/ADSAdClient31.dll?GetSAd=&PG=MSN9UT&AP=1339

http://65.54.195.185/ADSAdClient31.dll?GetSAd=&PG=MSNMMT&AP=1402

http://66.142.247.254/i/B2/B38AE443CC7154FB0B1FC2B5ACDA.JPG

http://66.142.247.254/i/91/94AB84A3A8C3441B39C4BFDF6885.jpg

http://66.142.247.254/i/AB/48246F6727DCA16791D0144BA78FA.jpg

http://66.142.247.254/i/F0/C71AF17271768EA57FE35F49CFF77.jpg

http://66.142.247.254/i/3A/E2E2E0FEA8E55AD59AAEBE43A7E246.jpg

http://66.142.247.254/i/50/C396B4EC11355010D2DF18C76E9F7D.jpg

http://66.142.247.254/i/31/DF78637BD438B9BB69A582FEA6879.jpg

http://66.142.247.254/i/AA/F78459FF8DDD39BF14DE4431D3395.JPG

http://66.142.247.254/i/56/F28E5AC0B9C07C5B1E13C6B797DC10.jpg

http://66.142.247.254/i/F2/C46FA12BAD98C59238B88C8417522.jpg

http://65.54.194.118/ADSAdClient31.dll?GetSAd=&PG=MSNCNT&AP=1463

http://65.54.194.118/ADSAdClient31.dll?GetSAd=&PG=MSNSUR&AP=1140

http://66.142.254.157/ads/764/0000000764_000000000000000385427.jpg

http://66.142.254.157/ads/1/0000000001_000000000000000017246.gif

http://69.108.159.61/as/wea3/i/en-US/saw/34.gif

http://69.108.159.61/as/wea3/i/en-US/saw/28.gif

http://69.108.159.61/as/wea3/i/en-US/saw/4.gif

http://69.108.159.61/br/hp/en-us/js/5/hpb.js

http://69.108.159.61/br/hp/en-us/js/5/ieminwidth.js

http://209.67.78.3/CNT/view/msnnkspc0020000003cnt/direct/01/

http://64.132.34.79/images/pixel.gif

试图链接的IP为：

207.46.19.30

208.172.13.254

65.54.152.126

69.108.159.61

69.108.159.61

69.108.159.61

207.46.216.62

207.46.216.55

63.150.153.30

207.46.216.62

128.241.21.149

65.54.194.118

69.108.159.61

65.54.195.185

66.142.247.254

66.142.247.254

65.54.194.118

66.142.254.157

69.108.159.61

69.108.159.61

209.67.78.3

64.132.34.79

注：% System%是一个可变路径。病毒通过查询操作系统来决定当前System文件夹的位置。Windows2000/NT中默认的安装路径是C:\\Winnt\\System32，windows95/98/me中默认的安装路径是C:\\Windows\\System，windowsXP中默认的安装路径是C:\\Windows\\System32。

杀毒方法：

1、下载杀毒软件

2、在断网的情况下，

关闭所有盘系统还原（右键我的电脑，属性，系统还原标签页，勾选在所有驱动器上关闭系统还原，确定.），

清空IE缓存（右键IE图标，属性里，勾选清除所有脱机内容），

开机按F8进入安全模式，在安全模式下安装杀毒软件，并杀毒