Trojan-Downloader.Win32.Small.elo
病毒标签:
[td=1,1,16%]
[td=1,1,84%]
病毒名称: Trojan-Downloader.Win32.Small.elo
中文名称: 下载者变种
病毒类型: 蠕虫类
文件 MD5: 49225E04EF3CC90B9B96AB6C9AC0CD9D
公开范围: 完全公开
危害等级: 4
文件长度: 1,097,736 字节
感染系统: Win9X以上系统
开发工具: Microsoft Visual C++ 5.0
病毒描述:
该病毒运行后,衍生病毒文件到多个目录下,添加注册表自动运行项与系统服务项以跟随
系统引导病毒体。修改用户 host文件以重定向到不良网址,进而造成链式反应。下载的病毒体
多为网络游戏盗号程序。
行为分析:
1 、衍生下列副本与文件:
%WinDir%upxdnd.exe
%System32%msdebug.dll
%System32%
etsrvcs.dll
%System32%
wizAsktao.dll
%System32%
wizAsktao.exe
%System32%
wiztlbb.dll
%System32%
wiztlbu.exe
%System32%RemoteDbg.dll
%System32%upxdnd.dll
%System32%windds32.dll
%System32%WMIApiSrv.dll
%System32%xpdhcp.dll
2 、新建注册表键值:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftActiveSetupInstalled Components
StubPath
Value: String: "%WINdirSystem32
wiztlbu.exe"
HKEY_LOCAL_MACHINESOFTWAREMicrosoftActiveSetupInstalled Components
StubPath
Value: String: "%WINdirSystem32
wiztlbu.exe"
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRunUpxdnd
Value: String: "%WinDir%upxdnd.exe"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWZCSRVCDescription
Value: String: " 启用 IEEE 802.11 适配器的自动配置 ."
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWZCSRVCDisplayName
Value: String: "Wireless Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWZCSRVCImagePath
Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes
%WinDir%Syste|m32
undll32.exenetsrvcs.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWMIApiSrvDescription
Value: String: " 为 Windows Management Instrumentation
(WMI) 提供所需的系统函数。"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWMIApiSrvDispla yName
Value: String: "WMI Performance API"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWMIApiSrvImagePath
Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes
%WinDir%System32
undll32.exe WMIApiSrv.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWinXPDHCPsvcDescription
Value: String: " 为远程计算机注册并更新 IP 地址。 "
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWinXPDHCPsvcDisplayName
Value: String: "WinXP DHCP Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWinXPDHCPsvcImagePath
Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes
%WinDir%System32
undll32.exexpdhcp.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWin32DDSDescription
Value: String: "Provides system and desktop level
support to the display driver"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWin32DDSDisplayName
Value: String: "Win32 Display Driver"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWin32DDSImagePath
Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes
%WinDirSystem32
undll32.exe windds32.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesRemoteDbgDescription
Value: String: " 允许 Administrators 组的成员进行远程调试。 "
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesRemoteDbgDisplayName
Value: String: "Remote Debug Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesRemoteDbgImagePath
Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes
%WinDir%System32
undll32.exeRemoteDbg.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSDebugsvcDescription
Value: String: " 为计算机系统提供 32 位调试服务。如果此服务被禁用,
所有明确依赖它的服务都将不能启动。 "
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSDebugsvcDisplayName
Value: String: "Win32 Debug Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSDebugsvcImagePath
Value: Type: REG_EXPAND_SZ Length: 51 (0x33) bytes
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesHello DownloadDisplayName
Value: String: "TCP/IP Check"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesHello DownloadImagePath
Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes
%Program Files%Common FilesSystemwab32res.exe.
3 、修改 host 文件为下列内容:
127.0.0.1localhost
127.0.0.1mmm.caifu18.net
127.0.0.1www.18dmm.com
127.0.0.1d.qbbd.com
127.0.0.1www.5117music.com
127.0.0.1www.union123.com
127.0.0.1www.wu7x.cn
127.0.0.1www.54699.com
127.0.0.1www1.6tan.com
127.0.0.1www2.6tan.com
127.0.0.1www.97725.com
127.0.0.1down.97725.com
127.0.0.1ip.315hack.com
127.0.0.1ip.54liumang.com
127.0.0.1www.41ip.com
127.0.0.1xulao.com
127.0.0.1www.heixiou.com
127.0.0.1www.9cyy.com
127.0.0.1www.hunll.com
127.0.0.1www.down.hunll.com
127.0.0.1do.77276.com
127.0.0.1www.baidulink.com
127.0.0.1adnx.yygou.cn
127.0.0.1222.73.220.45
127.0.0.1www.f5game.com
127.0.0.1www.guazhan.cn
127.0.0.1wm,103715.com
127.0.0.1www.my6688.cn
127.0.0.1i.96981.com
127.0.0.1d.77276.com
127.0.0.1www1.cw988.cn
127.0.0.1cool.47555.com
127.0.0.1www.asdwc.com
127.0.0.155880.cn
127.0.0.161.152.169.234
127.0.0.1cc.wzxqy.com
127.0.0.1www.54699.com
127.0.0.1t.gcuj.com
127.0.0.1www.puma163.com
127.0.0.1ceoww.com
127.0.0.1boolom.com
127.0.0.1adult-novel.cn
127.0.0.1ll.chinasese.net
127.0.0.1www.tellumore.com
127.0.0.1www.o1wg.com
127.0.0.1www.qq756.com
127.0.0.1ll.chinasese.net
127.0.0.1cool.47555.com
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:WinntSystem32 , windows95/98/me 中默认的安装路径是 C:WindowsSystem , windowsXP 中默认的安装路径是 C:WindowsSystem32 。
清除方案:
1 、 使用安天木马防线可彻底清除此病毒 ( 推荐 )
2 、 手工清除请按照行为分析删除对应文件,恢复相关系统设置。
(1)使用安天木马防线断开网络,结束病毒进程:
%WinDir%upxdnd.exe
%System32%
wizAsktao.exe
(2)删除并恢复病毒添加与修改的注册表键值:
HKEY_LOCAL_MACHINESOFTWAREMicrosoft
ActiveSetupInstalledComponents
StubPath
Value: String: "%WINdirSystem32
wiztlbu.exe"
HKEY_LOCAL_MACHINESOFTWAREMicrosoft
ActiveSetupInstalledComponents
StubPath
Value: String: "%WINdirSystem32
wiztlbu.exe"
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows
CurrentVersionRunUpxdnd
Value: String: "%WinDir%upxdnd.exe"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWZCSRVCDescription
Value: String: " 启用 IEEE 802.11 适配器的自动配置 ."
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWZCSRVCDisplayName
Value: String: "Wireless Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWZCSRVCImagePath
Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes
%WinDir%Syste|m32
undll32.exenetsrvcs.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWMIApiSrvDescription
Value: String: " 为 Windows Management Instrumentation
(WMI) 提供所需的系统函数。 "
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWMIApiSrvDisplayName
Value: String: "WMI Performance API"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWMIApiSrvImagePath
Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes
%WinDir%System32
undll32.exe WMIApiSrv.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWinXPDHCPsvcDescription
Value: String: " 为远程计算机注册并更新 IP 地址。 "
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWinXPDHCPsvcDisplayName
Value: String: "WinXP DHCP Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWinXPDHCPsvcImagePath
Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes
%WinDir%System32
undll32.exexpdhcp.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWin32DDSDescription
Value: String: "Provides system and desktop
level support to the display driver"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWin32DDSDisplayName
Value: String: "Win32 Display Driver"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesWin32DDSImagePath
Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes
%WinDirSystem32
undll32.exe windds32.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesRemoteDbgDescription
Value: String: " 允许 Administrators 组的成员进行远程调试。"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesRemoteDbgDisplayName
Value: String: "Remote Debug Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesRemoteDbgImagePath
Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes
%WinDir%System32
undll32.exeRemoteDbg.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesMSDebugsvcDescription
Value: String: " 为计算机系统提供 32 位调试服务。
如果此服务被禁用,所有明确依赖它的服务都将不能启动。 "
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesMSDebugsvcDisplayName
Value: String: "Win32 Debug Service"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSet
ServicesMSDebugsvcImagePath
Value: Type: REG_EXPAND_SZ Length: 51 (0x33) bytes
%WinDir%System32
undll32.exe msdebug.dll,input.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices
Hello DownloadDisplayName
Value: String: "TCP/IP Check"
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices
Hello DownloadImagePath
Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes
%Program Files%Common FilesSystemwab32res.exe.
(3)删除病毒衍生文件:
%WinDir%upxdnd.exe
%System32%msdebug.dll
%System32%
etsrvcs.dll
%System32%
wizAsktao.dll
%System32%
wizAsktao.exe
%System32%
wiztlbb.dll
%System32%
wiztlbu.exe
%System32%RemoteDbg.dll
%System32%upxdnd.dll
%System32%windds32.dll
%System32%WMIApiSrv.dll
%System32%xpdhcp.dll
(4)恢复 %WinDir%system32driversetchosts 文件内容为:
127.0.0.1localhost
(5)使用安天木马防线扫描全盘。