F-Secure Virus Descriptions : Sober.P
[Summary] | [Disinfection] | [Detailed Description] | [Detection]
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| NAME: | Sober.P |
| ALIAS: | Email-Worm.Win32.Sober.p, W32.Sober.O@mm, W32/Sober.gen@MM |
| SIZE: | 53544 |
Update on May 13th.
Since Sober.P worm stopped its spreading, we are downgrading its
Radar level.
Sober.P email worm was found on May 2nd, 2005. It sends itself as
an attachment in e-mail messages with English or German texts.
F-Secure provides a simple disinfection utility to eliminate
Sober.P worm infection. You can download this utility from
our ftp or website:
ftp://ftp.europe.f-secure.com/anti-virus/tools/sober_p_disinfect.zip
http://www.f-secure.com/tools/sober_p_disinfect.zip
The unpacked version is available here:
ftp://ftp.europe.f-secure.com/anti-virus/tools/sober_p_disinfect.bat
http://www.f-secure.com/tools/sober_p_disinfect.bat
Disinfection instructions can be found here:
ftp://ftp.europe.f-secure.com/anti-virus/tools/sober_p_disinfect.txt
http://www.f-secure.com/tools/sober_p_disinfect.txt
The worm is written in Visual Basic, UPX-packed PE executable
about 52 kilobytes long.
The worm sends different types of e-mail messages with English
and German texts and an attachment. The attachment is a ZIP
archive containing the worm's executable.
Installation to System
Once run, it will display a decoy error message:
It will then drop three new files "services.exe", "csrss.exe" and
"smss.exe" into the %WinDir%\Connection Wizard\Status\ folder,
created by the worm. All dropped files are closely related to the
original worm's binary.
Sober.P worm adds startup keys for "services.exe" in System
Registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run " WinStart"
%WinDir%\Connection Wizard\Status\services.exe
Upon reboot, this file will start the other two executable files.
The worm also creates several files in its installation directory:
packed1.sbr
packed2.sbr
packed3.sbr
These files contain BASE64-encoded representation of the Worm's
body. These files are used later when sending e-mail messages.
Spreading in E-mails
The worm sends different types of e-mail messages with English
or German texts and its file attached. The attachment is a ZIP
archive containing the worm's executable.
Before spreading the worm scans files with certain extensions on
all hard disks to harvest e-mail addresses. Files with the
following extensions are scanned:
pmr
phtm
stm
slk
inbox
imb
csv
bak
imh
xhtml
imm
imh
cms
nws
vcf
ctl
dhtm
cgi
pp
ppt
msg
jsp
oft
vbs
uin
ldb
abc
pst
cfg
mdw
mbx
mdx
mda
adp
nab
fdb
vap
dsp
ade
sln
dsw
mde
frm
bas
adr
cls
ini
ldif
log
mdb
xml
wsh
tbb
abx
abd
adb
pl
rtf
mmf
doc
ods
nch
xls
nsf
txt
wab
eml
hlp
mht
nfo
php
asp
shtml
dbx
While harvesting for e-mail addresses, if one of the following
substrings is present:
ntp-
ntp@
ntp.
info@
test@
@www
@from.
support
smtp-
@smtp.
gold-certs
ftp.
.dial.
.ppp.
anyone
subscribe
announce
@gmetref
sql.
someone
nothing
you@
user@
reciver@
somebody
secure
whatever@
whoever@
anywhere
yourname
mustermann@
.kundenserver.
mailer-daemon
variabel
noreply
-dav
law2
.sul.t-
.qmail@
t-ipconnect
t-dialin
ipt.aol
time
freeav
@ca.
abuse
winrar
domain.
host.
viren
bitdefender
spybot
detection
ewido.
emsisoft
linux
google
@foo.
winzip
@example.
bellcore.
@arin
mozilla
iana@
iana-
@iana
@avp
icrosoft.
@sophos
@panda
@kaspers
free-av
antivir
virus
verizon.
@ikarus.
@nai.
@messagelab
nlpmail01.
clock
then the e-mail address collected is discarded.
Depending on the domain the e-message message is being designated
to, either English or German language will be used. Usually
domains such as:
.de, gmx.de, gmx.at, gmx.net, gmx.ch
will receive messages constructed in German language.
Example messages may have subjects:
Re: Your Password
Re: Registration Confirmation
Re: Your email was blocked
Re: mailing error
FwD: Ihr Passwort
FwD: Ihre E-Mail wurde verweigert
FwD: Ich bin's, was zum lachen ;)
FwD: Glueckwunsch: Ihr WM Ticket
FwD: WM Ticket Verlosung
FwD: WM-Ticket-Auslosung
and body texts:
Account and Password Information are attached!
Visit: http://www.<collected_url>.com
This is an automatically generated E-Mail Delivery Status Notification.
Mail-Header, Mail-Body and Error Description are attached
Attachment-Scanner: Status OK,AntiVirus: No Virus found,Server-AntiVirus: No Virus (Clean)
Passwort und Benutzer-Informationen befinden sich in der beigefuegten Anlage.
*-* http://www.<collected_url>
*-* MailTo: PasswordHelp@<collected_url>
**** AntiVirus: Kein Virus gefunden
**** "GMX" AntiVirus Service
**** WebSite: http://www.gmx.de
Attachments:
mail_info.zip
our_secret.zip
Fifa_Info-Text.zip
okTicket-info.zip
free_PassWort-Info.zip
LOL.zip
One example of a mail Sober.P might send is a German message
promising free tickets to the soccer world championships:
Herzlichen Glueckwunsch,
beim Run auf die begehrten Tickets fr die 64 Spiele der Weltmeisterschaft 2006 in Deutschland sind Sie
dabei.Weitere Details ihrer Daten entnehmen Sie bitte dem Anhang.
St. Rainer Gellhaus
--- Pressesprecher Jens Grittner und Gerd Graus
--- FIFA Fussball-Weltmeisterschaft 2006
--- Organisationskomitee Deutschland
--- Tel. 069 / 2006 - 2600
--- Jens.Grittner@ok2006.de
--- Gerd.Graus@ok2006.de
Payload
Sober.P monitors a fixed list of NTP servers to syncronize its
time. It the date is 27.4.2005 or later, it tries to download and
execute file from one of the following domains:
free.pages.at
home.arcor.de
people.freenet.de
scifi.pages.at
home.pages.at
The following list of NTP servers are checked:
Rolex.PeachNet.edu
cuckoo.nevada.edu
ntp-1.ece.cmu.edu
ntp-sop.inria.fr
ntp.lth.se
ntp.massayonet.com.br
ntp.metas.ch
ntp.pads.ufrj.br
ntp1.arnes.si
ntp3.fau.de
rolex.usg.edu
sundial.columbia.edu
time-a.timefreq.bldrdoc.gov
time-ext.missouri.edu
time-server.ndo.com
time.kfki.hu
time.nist.gov
time.xmission.com
timelord.uregina.ca
utcnist.colorado.edu
Sober.P checks for its network connection using
'RasEnumConnections' win32 API call. If not successful, it tries
to connect to several domains using TCP port 80.
The worm also queries the following list of DNS servers:
165.230.99.71
8.10.3.56
128.135.5.5
202.89.131.4
219.127.89.34
129.115.102.150
38.9.211.2
134.94.80.2
130.149.2.12
150.203.22.28
131.215.254.100
128.194.254.2
4.2.2.3
195.185.185.195
209.68.2.46
129.186.1.200
198.6.1.2
131.243.64.3
24.93.40.33
195.182.96.29
192.90.162.8
158.43.128.1
128.35.253.3
61.95.134.168
200.74.214.246
204.117.214.10
194.25.2.129
203.162.0.11
210.66.241.1
217.237.150.225
217.237.151.161
128.9.128.127
151.201.0.39
209.253.113.2
213.239.234.108
62.156.146.242
207.69.188.186
207.217.120.43
129.187.10.25
200.52.83.103
129.187.16.1
141.40.10.35
213.218.170.6
212.242.88.2
193.158.124.143
One of the following domains are queried from the DNS servers:
microsoft.com
bigfoot.com
yahoo.com
t-online.de
google.com
hotmail.com
Sober.P worm is detected with the following FSAV update:
Version=2005-05-02_03
Write-up by:
Tzvetan Chaliavski; May 2nd, 2005;
Updated by:
Jarkko Turkulainen; May 4th, 2005;
Updated by:
Alexey Podrezov; May 16th, 2005;
F-Secure Corporation
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