输入法病毒
trojan-downloader.win32.geral.a
捕获时间
2010-3-19
危害等级
中
病毒症状
该样本是使用“vc”编写的“木马下载程序”，由微点主动防御软件自动捕获，长度为“32，256”字节，图标为“
”，使用“ exe”扩展名，通过文件捆绑、网页挂马、下载器下载等方式进行传播，病毒主要目的是向用户机器中下载安装大量病毒木马。
用户中毒后会出现网络速度降低，安全软件无故关闭，系统无故弹出错误，出现大量未知进程等现象。
感染对象
windows 2000/windows xp/windows 2003/windows vista
传播途径
网页挂马、文件捆绑、下载器下载
防范措施
已安装使用微点主动防御软件的用户，无须任何设置，微点主动防御将自动保护您的系统免受该病毒的入侵和破坏。无论您是否已经升级到最新版本，微点主动防御都能够有效清除该病毒。如果您没有将微点主动防御软件升级到最新版，微点主动防御软件在发现该病毒后将报警提示您发现“未知后门程序“，请直接选择删除处理（如图1）；
图1 微点主动防御软件自动捕获未知病毒（未升级）
如果您已经将微点主动防御软件升级到最新版本，微点将报警提示您发现木马"trojan-downloader.win32.geral.a”，请直接选择删除（如图2）。
图2 微点主动防御软件升级后截获已知病毒
未安装微点主动防御软件的手动解决办法：
1、手动删除以下文件：
%systemroot%\system32\winaed.ime
%systemroot%\fonts\sysin.ini
%systemroot%\system\pcif.sys
2、手动删除以下注册表项
hkey_current_user\keyboard layout\preload
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360rpt.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360safe.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360safebox.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360sd.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360tray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\antiarp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\arpfw.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\arswp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ast.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\autorun.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\avmonitor.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ccevtmgr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\egui.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ekrn.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\frameworkservice.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\gfupd.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\guardfield.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\hijackthis.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\icesword.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\iparmor.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kasarp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kav32.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kavpfw.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kavstart.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kissvc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kpfwsvc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kregex.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\krnl360svc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kswebshield.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kvmonxp.kxp
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kvsrvxp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kvwsc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kwatch.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\mcshield.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\mmsk.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\naprdmgr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\navapsvc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\nod32kui.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\pfw.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rav.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravmon.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravmond.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravservice.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravstub.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravtask.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravtray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\regedit.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwmain.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwproxy.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwsrv.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwstub.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rsagent.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rsaupd.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rsmain.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rstray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\runiep.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\safeboxtray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\scanfrm.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\srengldr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\superkiller.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\trojandetector.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\trojanwall.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\trojdie.kxp
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\vpc32.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\vptray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\vstskmgr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\woptilities.exe
变量声明：
%systemdriver% 系统所在分区，通常为“c:\”
%systemroot% windodws所在目录，通常为“c:\windows”
%documents and settings% 用户文档目录，通常为“c:\documents and settings”
%temp% 临时文件夹，通常为“c:\documents and settings\当前用户名称\local settings\temp”
%programfiles% 系统程序默认安装目录，通常为：“c:\programfiles”
病毒分析
1， 创建线程遍历查找窗口“kav.exe”,“kswebshield.exe”,“kav32.exe”,“mctray.exe”,“rtvscan.exe”,“mcshield.exe”如果存在则试图
向其发送退出代码，退出安全软件进程
2，在目录%systemroot%\system32中释放病毒文件winaed.ime,并修改其创建时间，设置为系统隐藏属性，以迷惑用户。
3，动态加载imm32.dll，利用相关函数，将winaed.ime作为输入法安装文件，安装名为“中文（扩展）”的输入法加载该病毒文件。
4，向创建的隐藏窗口发送消息，激活并记录键盘布局到注册表，启动病毒程序并更改用户默认的输入法为新安装的输入法。使用户使用输入法时便会加载病毒文件运行。
5，winaed.ime加载运行后，释放病毒文件到%systemroot%\system\pcif.sys。打开服务管理器，创建名为pcif的服务加载运行该驱动文件
提升自身权限，遍历进程查找以下进程“360tray.exe”，“ekrn.exe”，“egui.exe”，“nod32krn.exe”，“nod32kui.exe”，“360safe.exe”，“safeboxtray.exe”,“360safebox.exe”，“krnl360svc.exe”，“zhudongfangyu.exe”，“rstray.exe”，“ravmond.exe”，“360sd.exe”，“avp.exe”，“360rp.exe”，“kavstart.exe”，“kwatch.exe”,“kswebshield.exe”，“mcshield.exe” 如果发现则传入驱动关闭安全软件进程，并试图从注册表读取安全软件安装路径，并传入驱动，破坏安全软件文件，成功后删除驱动文件。
6，创建线程 监视窗口名字，如果发现是icesword则模拟操作关闭该程序。
7，创建线程 循环向注册表写入数据 劫持大量安全软件进程。
8，创建线程 病毒运行一段时间后从指定网址下载包含病毒文件地址的加密配置文件到%systemroot%\fonts\sysin.ini，并解密出该文件中的网址信息，从该指定网址下载大量未知病毒木马运行。
病毒创建文件：
%systemroot%\system32\winaed.ime
%systemroot%\fonts\sysin.ini
%systemroot%\system\pcif.sys
病毒删除文件：
%systemroot%\system\pcif.sys
病毒创建注册表：
hkey_current_user\keyboard layout\preload
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360rpt.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360safe.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360safebox.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360sd.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\360tray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\antiarp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\arpfw.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\arswp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ast.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\autorun.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\avmonitor.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ccevtmgr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\egui.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ekrn.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\frameworkservice.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\gfupd.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\guardfield.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\hijackthis.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\icesword.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\iparmor.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kasarp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kav32.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kavpfw.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kavstart.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kissvc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kpfwsvc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kregex.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\krnl360svc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kswebshield.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kvmonxp.kxp
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kvsrvxp.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kvwsc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\kwatch.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\mcshield.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\mmsk.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\naprdmgr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\navapsvc.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\nod32kui.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\pfw.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rav.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravmon.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravmond.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravservice.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravstub.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravtask.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\ravtray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\regedit.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwmain.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwproxy.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwsrv.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rfwstub.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rsagent.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rsaupd.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rsmain.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\rstray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\runiep.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\safeboxtray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\scanfrm.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\srengldr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\superkiller.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\trojandetector.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\trojanwall.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\trojdie.kxp
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\vpc32.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\vptray.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\vstskmgr.exe
hkey_local_machine\software\microsoft\windows nt\currentversion\image file execution options\woptilities.exe
病毒访问网络:
http://h.d***d.com/s.txt
http://abg.***.pl:20/d/ce.exe
