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本周提醒广大用户注意Mytob病毒家族的最新变种:Net-Worm.Win32.Mytob.w ,该病毒是一中使用多种方式传播的蠕虫,他利用微软MS04-011传播,利用发送含有病毒附件的邮件传播。病毒盗用windows JPG图表,诱使用户点击,病毒运行后会释放一些病毒文件到%homedriver%下及%system%目录下,修改注册表文件,添加病毒副本到启动项,达到随系统启动的目的。病毒还会来接到IRC服务器,等待并接受恶意用户的控制。病毒还会修改感染系统的%System%\drivers\etc\hosts 文件,阻止用户访问某些反病毒及安全类网站,尽量阻止用户清除该病毒。
| 病毒运行后首先释放以下病毒文件: |
对应的病毒名: |
%SystemDrive%\funny_pic.scr
%SystemDrive%\my_photo2005.scr
%SystemDrive%\see_this!!.scr
%SystemDrive%\hellmsn.exe
%System%\msvhost.exe
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Net-Worm.Win32.Mytob.x
Net-Worm.Win32.Mytob.x
Net-Worm.Win32.Mytob.x
Net-Worm.Win32.Mytob.f |
修改注册表文件,在以下位置新建键值:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\WINTASK
键值: 字串: "msvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
\CurrentVersion\Run\WINTASK
键值: 字串: "msvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
\CurrentVersion\RunServices\WINTASK
键值: 字串: "msvhost.exe"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001
\Control\Lsa\WINTASK
键值: 字串: "msvhost.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet
\Control\Lsa\WINTASK
键值: 字串: "msvhost.exe"
HKEY_USERS\Software\Microsoft\OLE\WINTASK
键值: 字串: "msvhost.exe"
HKEY_USERS\Software\Microsoft\Windows\CurrentVersion
\Run\WINTASK
键值: 字串: "msvhost.exe"
HKEY_USERS\SYSTEM\CurrentControlSet\Control\Lsa\WINTASK
键值: 字串: "msvhost.exe"
修改 %System%\drivers\etc\hosts 文件,在hosts文件中添加以下内容,阻止用户访问以下网站:
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
127.0.0.1
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securityresponse.symantec.com
symantec.com
www.sophos.com
sophos.com
www.mcafee.com
mcafee.com
liveupdate.symantecliveupdate.com
www.viruslist.com
viruslist.com
viruslist.com
f-secure.com
www.f-secure.com
kaspersky.com
www.avp.com
www.kaspersky.com
avp.com
www.networkassociates.com
networkassociates.com
www.ca.com
ca.com
mast.mcafee.com
my-etrust.com
www.my-etrust.com
download.mcafee.com
ispatch.mcafee.com
secure.nai.com
nai.com
www.nai.com
update.symantec.com
updates.symantec.com
us.mcafee.com
liveupdate.symantec.com
customer.symantec.com
rads.mcafee.com
trendmicro.com
www.microsoft.com
www.trendmicro.com |
病毒运行后通过搜索当前主机某些扩展名文件中的邮件地址,以及搜索windows地址簿中的地址来发送邮件,其中:
邮件标题可能为:
Error
hello
Status
Good day
Server Report
Mail Delivery System
Mail Transaction Failed
邮件正文可能为:
Here are your banks documents.
The original message was included as an attachment.
Mail transaction failed. Partial message is available.
The message contains Unicode characters and has been sent as a binary attachment.
The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.
病毒附件为双扩展名,其中:
第一扩展名可能为:DOC、TXT、HTM
第二扩展名可能为:PIF、SCR、EXE、ZIP
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