[virusinfo] W32/Mytob-GZ
- From: "Mike" <mikebike@xxxxxxxxx>
- To: virusinfo@xxxxxxxxxxxxx
- Date: Sat, 18 Jun 2005 14:09:29 -0700
From; Sophos Alert System:
Name: W32/Mytob-GZ
Aliases: Net-Worm.Win32.Mytob.r
Type: Win32 worm
Date: 18 June 2005
Sophos has issued protection for W32/Mytob-GZ.
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.
Customers using EM Library, Enterprise Console, PureMessage or
any of our Sophos small business solutions will be automatically
protected at their next scheduled update.
Information about W32/Mytob-GZ can be found at:
http://www.sophos.com/virusinfo/analyses/w32mytobgz.html
W32/Mytob-GZ is a mass-mailing worm and backdoor Trojan that can be controlled
through the Internet Relay Chat (IRC) network.
When first run W32/Mytob-GZ copies itself to the Windows system folder as
taskmr.exe and creates the following registry entries:
HKCU\System\CurrentControlSet\Control\Lsa
Windows Update
"taskmr.exe"
HKCU\Software\Microsoft\OLE
Windows Update
"taskmr.exe"
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Windows Update
"taskmr.exe"
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
Windows Update
"taskmr.exe"
HKLM\SOFTWARE\Microsoft\Ole
Windows Update
"taskmr.exe"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Windows Update
"taskmr.exe"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Windows Update
"taskmr.exe"
W32/Mytob-GZ copies itself to the root folder as:
eminem vs 2pac.scr
photo album.scr
funny pic.scr
and drops a file called sexymsn.exe (detected by Sophos as W32/Mytob-H) in the
same location. This component attempts to spread the worm by sending the
aforementioned SCR files through Windows Messenger to all online contacts.
W32/Mytob-GZ also drops a file named nethell.exe which is detected by Sophos as
Troj/Furoot-B.
W32/Mytob-GZ 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
W32/Mytob-GZ is capable of spreading through email and through various
operating system vulnerabilities such as LSASS (MS04-011). Email sent by
W32/Mytob-GZ has the following properties:
Subject line:
Mail Delivery System
Mail Transaction Failed
read it immediately
Server Report
Status
thanks!
Message text:
'This is a multi-part message in MIME format.'
'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.'
'The original message was included as an attachment.'
'I have received your document. The corrected document is attached.'
The attached file consists of a base name followed by the extentions 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-GZ harvests email addresses from files on the infected computer and
from the Windows address book. The worm avoids sending email to addresses that
contain the following:
.gov
.mil
accoun
acketst
admin
anyone
arin.
avp
berkeley
borlan
bsd
bsd
bugs
ca
certific
contact
example
feste
fido
foo.
fsf.
gnu
gold-certs
google
google
gov.
help
iana
ibm.com
icrosof
icrosoft
ietf
info
inpris
isc.o
isi.e
kernel
linux
linux
listserv
math
me
mit.e
mozilla
mydomai
no
nobody
nodomai
noone
not
nothing
ntivi
page
panda
pgp
postmaster
privacy
rating
rfc-ed
ripe.
root
ruslis
samples
secur
sendmail
service
site
soft
somebody
someone
sopho
submit
support
syma
tanford.e
the.bat
unix
unix
usenet
utgers.ed
webmaster
you
your
Sophos's anti-virus products include Genotype ? detection technology, which can
proactively protect against new threats without requiring an update. Sophos
customers have been protected against W32/Mytob-GZ (detected as W32/Mytob-Fam)
since version 3.92.
The W32/Mytob-GZ virus identity file (IDE) includes detection for:
Troj/StartPa-GV
http://www.sophos.com/virusinfo/analyses/trojstartpagv.html
W32/Antiman-F
http://www.sophos.com/virusinfo/analyses/w32antimanf.html
W32/Lamud-A
http://www.sophos.com/virusinfo/analyses/w32lamuda.html
W32/Demotry-A
http://www.sophos.com/virusinfo/analyses/w32demotrya.html
Troj/WinterLv-C
http://www.sophos.com/virusinfo/analyses/trojwinterlvc.html
Troj/QQDragon-G
http://www.sophos.com/virusinfo/analyses/trojqqdragong.html
Troj/QQPopoa-A
http://www.sophos.com/virusinfo/analyses/trojqqpopoaa.html
Troj/Resod-C
http://www.sophos.com/virusinfo/analyses/trojresodc.html
Troj/StatDrop-A
http://www.sophos.com/virusinfo/analyses/trojstatdropa.html
Customers with 3.xx or lower versions of Sophos Anti-Virus,
who are not running EM Library, can manually download the IDE
for W32/Mytob-GZ from:
http://www.sophos.com/downloads/ide/mytob-gz.ide
Read about how to use IDE files at
http://www.sophos.com/support/knowledgebase/article/363.html
*********** MIKE"S REPLY SEPARATOR ***********
Mike ~ It is a good day if I learned something new.
Editor MikesWhatsNews see a sample on my web page
http://www3.telus.net/mikebike
<mikeswhatsnews-request@xxxxxxxxxxxxx?Subject=subscribe>
http://www3.telus.net/mikebike/worm_removal.htm
See my Anti-Virus pages http://virusinfo.hackfix.org/index
<virusinfo-request@xxxxxxxxxxxxx?Subject=subscribe>
A Technical Support Alliance and OWTA Charter Member
Other related posts:
- » [virusinfo] W32/Mytob-GZ
