[virusinfo] W32/Mytob-BA
- From: "Mike" <mikebike@xxxxxxxxx>
- To: virusinfo@xxxxxxxxxxxxx
- Date: Wed, 13 Apr 2005 19:22:26 -0700
From; Sophos Alert System:
Name: W32/Mytob-BA
Aliases: Net-Worm.Win32.Mytob.y
Type: Win32 worm
Date: 14 April 2005
A virus identity (IDE) file which provides protection is
available now from the Sophos website, and will be incorporated
into the June 2005 (3.94) release of Sophos Anti-Virus.
Customers using EM Library, PureMessage or any of our Sophos
small business solutions will be automatically protected at
their next scheduled update.
At the time of writing, Sophos has received no reports from
users affected by this worm. However, we have issued this
advisory following enquiries to our support department from
customers.
Information about W32/Mytob-BA can be found at:
http://www.sophos.com/virusinfo/analyses/w32mytobba.html
W32/Mytob-BA is a mass-mailing worm and Trojan with an IRC backdoor.
W32/Mytob-BA is capable of spreading through various operating system
vulnerabilities such as LSASS (MS04-011).
Emails sent by W32/Mytob-BA have the following characteristics:
Subject line:
Error
Status
Server Report
Mail Transaction Failed
Mail Delivery System
hello
Good day
Message text:
Here are your banks documents.
The original message was included as an attachment.
The message cannot be represented in 7-bit ASCII encoding and has been sent as
a binary attachment.
The message contains Unicode characters and has been sent as a binary
attachment.
Mail transaction failed. Partial message is available.
The attached file consists of a base name followed by one of the extentions
BAT, CMD, PIF, SCR, EXE or ZIP. The worm may optionally create double
extensions where the first extension is DOC, TXT or HTM and the final extension
is PIF, SCR, EXE or ZIP.
W32/Mytob-BA harvests email addresses from files on the infected computer and
from the Windows address book.
When first run, W32/Mytob-BA copies itself to the Windows system folder as
taskgamr.exe and creates the following registry entries:
HKCU\Software\Microsoft\OLE
WINTASK
taskgamr.exe
HKCU\System\CurrentControlSet\Control\Lsa
WINTASK
taskgamr.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
WINTASK
taskgamr.exe
HKLM\Software\Microsoft\OLE
WINTASK
taskgamr.exe
HKLM\System\CurrentControlSet\Control\Lsa
WINTASK
taskgamr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
WINTASK
taskgamr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
WINTASK
taskgamr.exe
W32/Mytob-BA copies itself to the root folder as:
my_photo2005.scr
see_this!!.scr
funny_pic.scr
The worm also drops a helper component to C:\hellmsn.exe which is detected by
Sophos's anti-virus products as W32/Mytob-D.
W32/Mytob-BA also appends the following to the HOSTS file to deny access to
security-related websites:
127.0.0.1 www.symantec.com
127.0.0.1 securityresponse.symantec.com
127.0.0.1 symantec.com
127.0.0.1 www.sophos.com
127.0.0.1 sophos.com
127.0.0.1 www.mcafee.com
127.0.0.1 mcafee.com
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 www.viruslist.com
127.0.0.1 viruslist.com
127.0.0.1 viruslist.com
127.0.0.1 f-secure.com
127.0.0.1 www.f-secure.com
127.0.0.1 kaspersky.com
127.0.0.1 www.avp.com
127.0.0.1 www.kaspersky.com
127.0.0.1 avp.com
127.0.0.1 www.networkassociates.com
127.0.0.1 networkassociates.com
127.0.0.1 www.ca.com
127.0.0.1 ca.com
127.0.0.1 mast.mcafee.com
127.0.0.1 my-etrust.com
127.0.0.1 www.my-etrust.com
127.0.0.1 download.mcafee.com
127.0.0.1 dispatch.mcafee.com
127.0.0.1 secure.nai.com
127.0.0.1 nai.com
127.0.0.1 www.nai.com
127.0.0.1 update.symantec.com
127.0.0.1 updates.symantec.com
127.0.0.1 us.mcafee.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 customer.symantec.com
127.0.0.1 rads.mcafee.com
127.0.0.1 trendmicro.com
127.0.0.1 www.microsoft.com
127.0.0.1 www.trendmicro.com
This IDE file also includes detection for:
W32/Mytob-AC
http://www.sophos.com/virusinfo/analyses/w32mytobac.html
Troj/Agent-DE
http://www.sophos.com/virusinfo/analyses/trojagentde.html
Troj/Dloader-YK
http://www.sophos.com/virusinfo/analyses/trojdloaderyk.html
Download the IDE file from:
http://www.sophos.com/downloads/ide/mytob-ba.ide
Download all the IDE files available for the current version of
Sophos Anti-Virus in a single compressed file. The file is
available in two formats:
Zip file:
http://www.sophos.com/downloads/ide/ides.zip
Self-extracting file:
http://www.sophos.com/downloads/ide/ides.exe
Read about how to use IDE files at
http://www.sophos.com/downloads/ide/using.html
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