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词条 Trojan-Downloader.Win32.Small.elo
释义

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。

病毒标签

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

行为分析

衍生副本与文件

%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

新建注册表键值

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\ActiveSetup\\Installed Components\\

\\StubPath

Value: String: "%WINdir\\System32\wiztlbu.exe"

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\ActiveSetup\\Installed Components\\

\\StubPath

Value: String: "%WINdir\\System32\wiztlbu.exe"

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\Upxdnd

Value: String: "%\\WinDir%\\upxdnd.exe"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WZCSRVC\\Description

Value: String: " 启用 IEEE 802.11 适配器的自动配置 ."

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WZCSRVC\\DisplayName

Value: String: "Wireless Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WZCSRVC\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes

%WinDir%\\Syste|m32\\rundll32.exenetsrvcs.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WMIApiSrv\\Description

Value: String: " 为 Windows Management Instrumentation

(WMI) 提供所需的系统函数。"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WMIApiSrv\\Displa yName

Value: String: "WMI Performance API"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WMIApiSrv\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes

%WinDir%\\System32\\rundll32.exe WMIApiSrv.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WinXPDHCPsvc\\Description

Value: String: " 为远程计算机注册并更新 IP 地址。 "

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WinXPDHCPsvc\\DisplayName

Value: String: "WinXP DHCP Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\WinXPDHCPsvc\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes

%WinDir%\\System32\\rundll32.exexpdhcp.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Win32DDS\\Description

Value: String: "Provides system and desktop level

support to the display driver"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Win32DDS\\DisplayName

Value: String: "Win32 Display Driver"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Win32DDS\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes

%WinDir\\System32\\rundll32.exe windds32.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\RemoteDbg\\Description

Value: String: " 允许 Administrators 组的成员进行远程调试。 "

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\RemoteDbg\\DisplayName

Value: String: "Remote Debug Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\RemoteDbg\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes

%WinDir%\\System32\\rundll32.exeRemoteDbg.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\MSDebugsvc\\Description

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_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\MSDebugsvc\\DisplayName

Value: String: "Win32 Debug Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\MSDebugsvc\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 51 (0x33) bytes

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Hello Download\\DisplayName

Value: String: "TCP/IP Check"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Hello Download\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes

%Program Files%\\Common Files\\System\\wab32res.exe.

修改host文件

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 。

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_MACHINE\\SOFTWARE\\Microsoft\\

ActiveSetup\\InstalledComponents\\

\\StubPath

Value: String: "%WINdir\\System32\wiztlbu.exe"

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\

ActiveSetup\\InstalledComponents\\

\\StubPath

Value: String: "%WINdir\\System32\wiztlbu.exe"

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\

CurrentVersion\\Run\\Upxdnd

Value: String: "%\\WinDir%\\upxdnd.exe"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WZCSRVC\\Description

Value: String: " 启用 IEEE 802.11 适配器的自动配置 ."

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WZCSRVC\\DisplayName

Value: String: "Wireless Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WZCSRVC\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes

%WinDir%\\Syste|m32\\rundll32.exenetsrvcs.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WMIApiSrv\\Description

Value: String: " 为 Windows Management Instrumentation

(WMI) 提供所需的系统函数。 "

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WMIApiSrv\\DisplayName

Value: String: "WMI Performance API"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WMIApiSrv\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes

%WinDir%\\System32\\rundll32.exe WMIApiSrv.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WinXPDHCPsvc\\Description

Value: String: " 为远程计算机注册并更新 IP 地址。 "

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WinXPDHCPsvc\\DisplayName

Value: String: "WinXP DHCP Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\WinXPDHCPsvc\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes

%WinDir%\\System32\\rundll32.exexpdhcp.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\Win32DDS\\Description

Value: String: "Provides system and desktop

level support to the display driver"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\Win32DDS\\DisplayName

Value: String: "Win32 Display Driver"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\Win32DDS\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 52 (0x34) bytes

%WinDir\\System32\\rundll32.exe windds32.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\RemoteDbg\\Description

Value: String: " 允许 Administrators 组的成员进行远程调试。"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\RemoteDbg\\DisplayName

Value: String: "Remote Debug Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\RemoteDbg\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 53 (0x35) bytes

%WinDir%\\System32\\rundll32.exeRemoteDbg.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\MSDebugsvc\\Description

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_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\MSDebugsvc\\DisplayName

Value: String: "Win32 Debug Service"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\

Services\\MSDebugsvc\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 51 (0x33) bytes

%WinDir%\\System32\\rundll32.exe msdebug.dll,input.

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\

Hello Download\\DisplayName

Value: String: "TCP/IP Check"

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\

Hello Download\\ImagePath

Value: Type: REG_EXPAND_SZ Length: 50 (0x32) bytes

%Program Files%\\Common Files\\System\\wab32res.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%\\system32\\drivers\\etc\\hosts 文件内容为:

127.0.0.1 localhost

(5)使用安天木马防线扫描全盘。

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更新时间:2025/3/3 5:16:53