Details
I-Worm.Mydoom.y

This worm spreads via the Internet as an attachment to infected messages. It also spreads via file-sharing networks, and through the vulnerability in Microsoft Windows LSASS. The worm also has the ability to propagate by sending URLs by ICQ - these URLs are of sites which contain the body of the worm.
It is written in Microsoft Visual C++, and packed using UPX. The packed file is 69632 bytes in size.
Installation
The behaviour of the worm when launching depends on the version of Windows being run.
When lauching on Windows 9x systems, the worm:
Registers itself in the system registry to ensure that it is launched each time the system is rebooted:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
RPCserv= Creates the mutex “ertglddfgd” to flag its presence in the system. This ensures that only one copy of the worm will be launched.
When launching on Windows NT/ 2000/ XP systems, the worm:
Copies the file containing itself to the Windows directory as ’services.exe’.
Registers itself as a service under the name ‘NetBios Ext’. This service is then registered in the system registry:
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetBios Ext]
“ImagePath” = %Windows%\services.exe serv

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBios Ext]
“ImagePath” = %Windows%\services.exe serv
Creates the mutex “ertglddfgd” to flag its presence in the system. This ensures that only one copy of the worm will be launched.
Propagation
Propagation via attachments to infected emails
The worm harvests email addresses from files with the following extensions:
asp
cfg
cgi
dbx
dht
eml
htm
jsp
mbx
mht
msg
php
sht
stm
tbb
txt
uin
wab
xls

Messages are not sent to addresses which contain the following text strings:
.gov
.mil
@foo.
@iana
abuse
accoun
acketst
admin
antivi
anyone
arin.
avp.
berkeley
borlan
bsd
certific
contact
example
feste
fido
fsf.
gnu
gold-certs
google
gov.
help
iana
ibm.com
icq.com
icrosof
icrosoft
ietf
info
inpris
isc.o
isi.e
kasp
kernel
linux
listserv
math
messagelabs
mit.e
mozilla
mydomai
news
nobody
nodomai
noone
noreply
nothing
ntivi
panda
pgp
postmaster
privacy
rating
rfc-ed
ripe.
root
ruslis
samples
secur
sendmail
service
site
somebody
someone
sopho
spam
submit
support
syman
tanford.e
unix
upport
usenet
utgers.ed
webmaster
www

Characteristics of infected emails:
Sender’s mail server (chosen at random from the list below):
@1access.net
@a1isp.net
@accessus.net
@address.com
@ameralinx.net
@aol.com
@apci.net
@arczip.com
@aristotle.net
@att.net
@cableone.net
@cais.com
@canada.com
@cayuse.net
@ccp.com
@ccpc.net
@chello.com
@compuserve.com
@core.com
@cox.net
@cybernex.net
@dailymail.co.uk
@dialupnet.com
@earthlink.net
@eclipse.net
@eisa.com
@ev1.net
@excite.com
@fast.net
@fcc.net
@flex.com
@gbronline.com
@globalbiz.net
@globetrotter.net
@gmx.net
@highstream.net
@hiwaay.net
@hotmail.com
@ieway.com
@inext.fr
@infoave.net
@iquest.net
@isp.com
@ispwest.com
@istep.com
@juno.com
@loa.com
@macconnect.com
@madriver.com
@mail.com
@msn.com
@nccw.net
@netcenter.com
@netrox.net
@netzero.net
@pacific.net.sg
@palm.net
@pathlink.com
@peoplepc.com
@pics.com
@rcn.com
@ricochet.com
@surfree.com
@tiscali.com
@toad.net
@t-online.com
@t-online.de
@ultimanet.com
@verizon.net
@wanadoo.com
@worldcom.com
@worldshare.net
@wwc.com
@yahoo.co.uk
@yahoo.com
@ziplink.net

Message subject:
(no subject)

:))
2 new photos
FW:
FW: (no subject)
FW: 2 new photos
FW: Cool
FW: hello sweety :>
FW: hi
FW: hi, it’s me
FW: it’s me
FW: jenna’s photos
FW: my photos
FW: new photos
FW: remember me?..
FW: that’s me
FW:cool
FW:COOL!
FW:fun pictures
hello sweety :>
hi
hi, it’s me
it’s me
LOOK!
my photos
new photos
Re:
Re:cool
Re:COOL!
Re:fun pictures
Re[2]:
Re[2]:cool
Re[2]:COOL!
Re[2]:fun pictures
remember me?..
that’s me

Message text:
—–Original Message—–
From: Jeny K.
Sent: Monday, September 13, 2004 8:57 PM
To: Morpheus
check my new photos
:))
miss you, jeny k
—–Original Message—–
From: Jena K.
Sent: Monday, September 13, 2004 5:23 AM
To: friends
Check Out Archive.. So.. What Do You Thinkall Am I Hot?
Waining For Your Answer
Jena Key
—–Original Message—–
From: jenny k.
Sent: Monday, September 13, 2004 10:23 AM
To: My Tiger (e-mail)
new fotos(archived) you asked
jenny k
—–Original Message—–
From: jenna k. (e-mail)
Sent: Monday, September 13, 2004 11:38 AM
To: Cat
my new fotos archived ))
kiss, jenna k
—–Original Message—–
From: Jeny
Sent: Monday, September 13, 2004 8:57 PM
To: Neo
see the photos in attached archive
:))
kiss you, jeny
—–Original Message—–
From: Jena
Sent: Monday, September 13, 2004 5:23 AM
To: friend
Photos in archive.. So.. Am I Hot?
Waining For Your Answer
Jena
—–Original Message—–
From: Jenna Knukles
Sent: Monday, September 13, 2004 9:05 AM
To: Friends Group
in self-extracting archive my photos
Jenna
—–Original Message—–
From: jenna (e-mail)
Sent: Monday, September 13, 2004 11:38 AM
To: ma kittie
my photos archived ))
kiss, jenna
fun flash game!
fun flash!
game!
fun game!
Print money at home!
look at atach
—–Original Message—–
From: Jeny K.
Sent: Monday, September 13, 2004 8:57 PM
To: Morpheus check out the new photos
:))
miss you, jeny k
—–Original Message—–
From: Jena K.
Sent: Monday, September 13, 2004 5:23 AM
To: friends
So.. What Do You Think… Am I Hot?
Waining For Your Answer
Jena Key
—–Original Message—–
From: Jenna Knukles
Sent: Monday, September 13, 2004 9:05 AM in archive my new fotos Jenna K
—–Original Message—–
From: jenny k.
Sent: Monday, September 13, 2004 10:23 AM
To: My Tiger (e-mail)
new fotos you asked
jenny k
—–Original Message—–
From: jenna k. (e-mail)
Sent: Monday, September 13, 2004 11:38 AM
To: Cat
my new fotos zipped ))
kiss, jenna k
—–Original Message—–
From: Jeny
Sent: Monday, September 13, 2004 8:57 PM
To: Neo
see the photos
:))
kiss you, jeny
—–Original Message—–
From: Jena
Sent: Monday, September 13, 2004 5:23 AM
To: friend
So.. Am I Hot?
Waining For Your Answer
Jena
—–Original Message—–
From: Jenna Knukles
Sent: Monday, September 13, 2004 9:05 AM
To: Friends Group
in archive my photos
Jenna
—–Original Message—–
From: jenny
Sent: Monday, September 13, 2004 10:23 AM
To: Mr.X (e-mail)
photos you asked
jenny
—–Original Message—–
From: jenna (e-mail)
Sent: Monday, September 13, 2004 11:38 AM
To: ma kittie
my photos zipped ))
kiss, jenna
do you know this girl?
do you know this people?
do you know this ppl?
Is it your photo?
LOOK!
my new photos
with best wishes
a lot of fun.
Hello…Funny pic…hehehe
I’ve never seen this before. Look at that !
Look
Hello!
You’ve got a postcard. To view this postcard, click on the attached file
have you seen this before?
Loool!!
fun
fun pictures
hi!
look at new photos
fun flash game!
fun flash!
game!
fun game!
Print money at home!
look at atach
Signature:
+++ Attachment: No Virus found
+++
The signature of the antivirus company is chosen from the following list:
Bitdefender AntiVirus - www.bitdefender.com
F-Secure AntiVirus - www.f-secure.com
Kaspersky AntiVirus - www.kaspersky.com
MC-Afee AntiVirus - www.mcafee.com
MessageLabs AntiVirus - www.messagelabs.com
Norman AntiVirus - www.norman.com
Norton AntiVirus - www.symantec.de
Panda AntiVirus - www.pandasoftware.com
Attachment name:
2004042301.jpg .pif
arc.cpl
arc.exe
arhive.zip
black.gif .pif
DCP_0002.JPG .pif
document.jpg .pif
flowers.jpg .pif
foto.cpl
foto.exe
fotos.cpl
fotos.exe
fotos.zip
images.zip
julia038.jpg .pif
marie_dancing.jpg .pif
me_01.jpg .pif
my_foto.cpl
my_foto.exe
my_photo.jpg .pif
my_photos.cpl
my_photos.exe
my_photos.zip
myfoto.cpl
myfoto.exe
myphotos.zip
myphotos_arc.exe
new_photos.cpl
new_photos.exe
new_photos.zip
new_pic.zip
newphotos.cpl
newphotos.exe
nude_.jpg .pif
photo.jpg .pif
photo_se.cpl
photo_se.exe
photo08.jpg .pif
photoarchive.cpl
photoarchive.exe
photofile.cpl
photofile.exe
photos.exe.safe
photos.selfextracting.exe
photos.zip
photos_arc.cpl
photos_arc.exe
pic.jpg .pif
pic.zip
sunny.jpg .pif
with_flowers.jpg .pif

The worm may utilise a double extension to disguise the attached file by presenting it as a benign JPEG file. In such cases, the attachment name will appear in the following way:
document.jpg .pif
Propagation via file-sharing networks.
The worm propagates via the Kazaa file-sharing network. When propagating, it uses file names chosen from the following list:
1.exe
antibush.scr
childporno.pif
coolgame.zip .exe
crazzygirls.scr
dap53 crack.exe
dap53.exe
dap71.exe
dvdplayer.exe
eroticgirls2.0.exe
fantasy.scr
hello.pif
icq2004-final.exe
icqcrack.exe
icqlite.exe
icqpro2003b crack.exe
icqpro2003b.exe
iMeshV4 crack.exe
iMeshV4.exe
kmd.exe
LimeWireWin.exe
matrix.scr
Morpheus.exe
mult.exe
myfack.pif
mylove.pif
mymusic.pif
mynewphoto.zip .exe
newvirus.exe
nicegirlsshowv12.scr
opera7.7.exe
opera7.x crack.exe
pinguin5.exe
rulezzz.scr
trillian 2.0 crack.exe
trillian-v2.74h.exe
tropicallagoonss.scr
winamp5.exe
winamp6.exe
WinZip 9.0 crack.exe
WinZip 9.0.exe
wrar330 crack.exe
wrar330.exe
you the best.scr
zlsSetup_45_538_001.exe

In order to disguise its presence, the worm will change the size of the file being transmitted, by writing random rubbish to the end of the file.
Propagation via ICQ
The worm sends messages containing URLs by ICQ. These URLs point to sites which contain the worm’s body. Messages are selected from the list below:
best game http://65.110.51.XXX/icon/game.exe ;-);-);-)
fun game http://www.scionicmusic.com/XXX/game.exe :-):-):-)
funn http://64.40.98.XXX/icon/game.exe :-):-):-)
funy game http://www.scionicmusic.com/XXX/game.exe ;-);-);-)
http://64.40.98.XXX//icon/game.exe :-):-)
http://64.40.98.XXX/icon/game.exe funny :-);-)
http://65.110.51.XXX/icon/game.exe ;-);-);-);-)
http://65.110.51.XXX/icon/game.exe LOL!! ;-);-);-)
http://www.XXX.unibo.it/claroline142/photo.exe i cried
http://www.XXX.unibo.it/claroline142/photo.exe lol :-):-)
i now play in game http://www.scionicmusic.com/XXX/game.exe :-):-)
my photos (archived)http://www.XXX.unibo.it/claroline142/photo.exe
Payload
In order to gain unrestricted access to the Internet, the worm registers itself in the FirewallPolicy; this means it has ‘legal program’ status. Once it has done this, it prevents any further changes being made to the system registry.
It then terminates the following processes:
_AVP32.EXE
_AVPCC.EXE
_AVPM.EXE
ACKWIN32.EXE
ADAWARE.EXE
ADVXDWIN.EXE
AGENTSVR.EXE
AGENTW.EXE
ALERTSVC.EXE
ALEVIR.EXE
ALOGSERV.EXE
AMON9X.EXE
ANTI-TROJAN.EXE
ANTIVIRUS.EXE
ANTS.EXE
APIMONITOR.EXE
APLICA32.EXE
APVXDWIN.EXE
ARR.EXE
ATCON.EXE
ATGUARD.EXE
ATRO55EN.EXE
ATUPDATER.EXE
ATWATCH.EXE
AU.EXE
AUPDATE.EXE
AUTODOWN.EXE
AUTO-PROTECT.NAV80TRY.EXE
AUTOTRACE.EXE
AUTOUPDATE.EXE
AVCONSOL.EXE
AVE32.EXE
AVGCC32.EXE
AVGCTRL.EXE
AVGNT.EXE
AVGSERV.EXE
AVGSERV9.EXE
AVGUARD.EXE
AVGW.EXE
AVKPOP.EXE
AVKSERV.EXE
AVKSERVICE.EXE
AVKWCTl9.EXE
AVLTMAIN.EXE
AVNT.EXE
AVP.EXE
AVP32.EXE
AVPCC.EXE
AVPDOS32.EXE
AVPM.EXE
AVPTC32.EXE
AVPUPD.EXE
AVSCHED32.EXE
AVSYNMGR.EXE
AVWIN95.EXE
AVWINNT.EXE
AVWUPD.EXE
AVWUPD32.EXE
AVWUPSRV.EXE
AVXMONITOR9X.EXE
AVXMONITORNT.EXE
AVXQUAR.EXE
b055262c.dll
backdoor.rbot.gen.exe
backdoor.rbot.gen_(17).exe
BACKWEB.EXE
BARGAINS.EXE
BD_PROFESSIONAL.EXE
BEAGLE.EXE
BELT.EXE
BIDEF.EXE
BIDSERVER.EXE
BIPCP.EXE
BIPCPEVALSETUP.EXE
BISP.EXE
BLACKD.EXE
BLACKICE.EXE
BLSS.EXE
BOOTCONF.EXE
BOOTWARN.EXE
BORG2.EXE
BPC.EXE
BRASIL.EXE
BS120.EXE
BUNDLE.EXE
BVT.EXE
CCAPP.EXE
CCEVTMGR.EXE
CCPXYSVC.EXE
CDP.EXE
CFD.EXE
CFGWIZ.EXE
CFIADMIN.EXE
CFIAUDIT.EXE
CFINET.EXE
CFINET32.EXE
Claw95.EXE
CLAW95CF.EXE
CLEAN.EXE
CLEANER.EXE
CLEANER3.EXE
CLEANPC.EXE
CLICK.EXE
CMD32.EXE
CMESYS.EXE
CMGRDIAN.EXE
CMON016.EXE
CONNECTIONMONITOR.EXE
CPD.EXE
CPF9X206.EXE
CPFNT206.EXE
CTRL.EXE
CV.EXE
CWNB181.EXE
CWNTDWMO.EXE
d3dupdate.exe
dailin.exe
DATEMANAGER.EXE
DCOMX.EXE
DEFALERT.EXE
DEFSCANGUI.EXE
DEFWATCH.EXE
DEPUTY.EXE
DLLCACHE.EXE
DLLREG.EXE
DOORS.EXE
DPF.EXE
DPFSETUP.EXE
DPPS2.EXE
DRWATSON.EXE
DRWEB32.EXE
DRWEBUPW.EXE
DSSAGENT.EXE
DVP95.EXE
DVP95_0.EXE
ECENGINE.EXE
EFPEADM.EXE
EMSW.EXE
ENT.EXE
ESAFE.EXE
ESCANH95.EXE
ESCANHNT.EXE
ESCANV95.EXE
ESPWATCH.EXE
ETHEREAL.EXE
ETRUSTCIPE.EXE
EVPN.EXE
EXANTIVIRUS-CNET.EXE
EXE.AVXW.EXE
EXPERT.EXE
EXPLORE.EXE
F-AGNT95.EXE
F-AGOBOT.EXE
FAMEH32.EXE
FAST.EXE
FCH32.EXE
FIH32.EXE
FINDVIRU.EXE
FIREWALL.EXE
FLOWPROTECTOR.EXE
FNRB32.EXE
FPROT.EXE
F-PROT.EXE
F-PROT95.EXE
FP-WIN.EXE
FP-WIN_TRIAL.EXE
FRW.EXE
FSAA.EXE
FSAV.EXE
FSAV32.EXE
FSAV530STBYB.EXE
FSAV530WTBYB.EXE
FSAV95.EXE
FSGK32.EXE
FSM32.EXE
FSMA32.EXE
FSMB32.EXE
F-STOPW.EXE
fvprotect.exe
GATOR.EXE
GBMENU.EXE
GBPOLL.EXE
GENERICS.EXE
GfxAcc.exe
GMT.EXE
GUARD.EXE
GUARDDOG.EXE
HACKTRACERSETUP.EXE
HBINST.EXE
HBSRV.EXE
HIJACKTHIS.EXE
HOTACTIO.EXE
HOTPATCH.EXE
HTLOG.EXE
HTPATCH.EXE
HWPE.EXE
hxdef.exe
HXDL.EXE
HXIUL.EXE
IAMAPP.EXE
IAMSERV.EXE
IAMSTATS.EXE
IAOIN.EXE
IBMASN.EXE
IBMAVSP.EXE
ICLOAD95.EXE
ICLOADNT.EXE
ICMON.EXE
ICSSUPPNT.EXE
ICSUPP95.EXE
ICSUPPNT.EXE
IDLE.EXE
IEDLL.EXE
IEDRIVER.EXE
IFACE.EXE
IFW2000.EXE
INETLNFO.EXE
INFUS.EXE
INFWIN.EXE
INIT.EXE
INTDEL.EXE
INTREN.EXE
IOMON98.EXE
IPARMOR.EXE
IRIS.EXE
ISASS.EXE
ISRV95.EXE
ISTSVC.EXE
JAMMER.EXE
jammer2nd.exe
JDBGMRG.EXE
JEDI.EXE
KAVLITE40ENG.EXE
KAVPERS40ENG.EXE
KAVPF.EXE
KEENVALUE.EXE
KERIO-PF-213-EN-WIN.EXE
KERIO-WRL-421-EN-WIN.EXE
KERIO-WRP-421-EN-WIN.EXE
KERNEL32.EXE
KILLPROCESSSETUP161.EXE
LAUNCHER.EXE
LDNETMON.EXE
LDPRO.EXE
LDPROMENU.EXE
LDSCAN.EXE
LNETINFO.EXE
LOADER.EXE
LOCALNET.EXE
LOCKDOWN.EXE
LOCKDOWN2000.EXE
LOOKOUT.EXE
LORDPE.EXE
LSETUP.EXE
LUALL.EXE
LUAU.EXE
LUCOMSERVER.EXE
LUINIT.EXE
LUSPT.EXE
MAPISVC32.EXE
MCAGENT.EXE
MCMNHDLR.EXE
MCSHIELD.EXE
MCTOOL.EXE
MCUPDATE.EXE
MCVSRTE.EXE
MCVSSHLD.EXE
MD.EXE
MFIN32.EXE
MFW2EN.EXE
MFWENG3.02D30.EXE
MGAVRTCL.EXE
MGAVRTE.EXE
MGHTML.EXE
MGUI.EXE
MINILOG.EXE
MMOD.EXE
MONITOR.EXE
MOOLIVE.EXE
MOSTAT.EXE
MPFAGENT.EXE
MPFSERVICE.EXE
MPFTRAY.EXE
MRFLUX.EXE
MSAPP.EXE
MSBB.EXE
MSBLAST.EXE
MSCACHE.EXE
MSCCN32.EXE
MSCMAN.EXE
MSCONFIG.EXE
MSDM.EXE
MSDOS.EXE
MSIEXEC16.EXE
MSINFO32.EXE
MSLAUGH.EXE
MSMGT.EXE
MSMSGRI32.EXE
MSSMMC32.EXE
msssss.exe
MSSYS.EXE
MSVXD.EXE
MU0311AD.EXE
MWATCH.EXE
N32SCANW.EXE
NAV.EXE
NAVAP.NAVAPSVC.EXE
NAVAPSVC.EXE
NAVAPW32.EXE
NAVDX.EXE
NAVENGNAVEX15.NAVLU32.EXE
NAVLU32.EXE
NAVNT.EXE
NAVSTUB.EXE
NAVW32.EXE
NAVWNT.EXE
NC2000.EXE
NCINST4.EXE
NDD32.EXE
NEOMONITOR.EXE
NEOWATCHLOG.EXE
NETARMOR.EXE
NETD32.EXE
NETINFO.EXE
NETMON.EXE
NETSCANPRO.EXE
NETSPYHUNTER-1.2.EXE
NETUTILS.EXE
NISSERV.EXE
NISUM.EXE
NMAIN.EXE
NOD32.EXE
NORMIST.EXE
NORTON_INTERNET_SECU_3.0_407.EXE
NOTSTART.EXE
NPF40_TW_98_NT_ME_2K.EXE
NPFMESSENGER.EXE
NPROTECT.EXE
NPSCHECK.EXE
NPSSVC.EXE
NSCHED32.EXE
NSSYS32.EXE
NSTASK32.EXE
NSUPDATE.EXE
NT.EXE
NTRTSCAN.EXE
NTXconfig.EXE
NUI.EXE
NUPGRADE.EXE
NVARCH16.EXE
NVC95.EXE
NWINST4.EXE
NWSERVICE.EXE
NWTOOL16.EXE
OLLYDBG.EXE
ONSRVR.EXE
OPTIMIZE.EXE
OSTRONET.EXE
OTFIX.EXE
OUTPOST.EXE
OUTPOSTINSTALL.EXE
OUTPOSTPROINSTALL.EXE
PADMIN.EXE
PANIXK.EXE
PATCH.EXE
PAVCL.EXE
PAVPROXY.EXE
PAVSCHED.EXE
PAVW.EXE
PCC2002S902.EXE
PCC2K_76_1436.EXE
PCCIOMON.EXE
PCCNTMON.EXE
PCCWIN97.EXE
PCCWIN98.EXE
PCDSETUP.EXE
PCFWALLICON.EXE
PCIP10117_0.EXE
PCSCAN.EXE
PDSETUP.EXE
PENIS.EXE
PERISCOPE.EXE
PERSFW.EXE
PERSWF.EXE
PF2.EXE
PFWADMIN.EXE
PGMONITR.EXE
PINGSCAN.EXE
PLATIN.EXE
POP3TRAP.EXE
POPROXY.EXE
POPSCAN.EXE
PORTDETECTIVE.EXE
PORTMONITOR.EXE
POWERSCAN.EXE
PPINUPDT.EXE
PPTBC.EXE
PPVSTOP.EXE
PRIZESURFER.EXE
PRMT.EXE
PRMVR.EXE
PROCDUMP.EXE
PROCESSMONITOR.EXE
PROCEXPLORERV1.0.EXE
PROGRAMAUDITOR.EXE
PROPORT.EXE
PROTECTX.EXE
PSPF.EXE
PURGE.EXE
PUSSY.EXE
PVIEW95.EXE
QCONSOLE.EXE
QSERVER.EXE
RAPAPP.EXE
rasmngr.exe
RAV7.EXE
RAV7WIN.EXE
RAV8WIN32ENG.EXE
RAVMOND.exe
RAY.EXE
RB.EXE
RB32.EXE
RCSYNC.EXE
REALMON.EXE
REGED.EXE
RESCUE.EXE
RESCUE32.EXE
RRGUARD.EXE
RSHELL.EXE
RTVSCAN.EXE
RTVSCN95.EXE
RULAUNCH.EXE
RUNDLL.EXE
RUNDLL16.EXE
RUXDLL32.EXE
SAFEWEB.EXE
SAHAGENT.EXE
SAVE.EXE
SAVENOW.EXE
SBSERV.EXE
SC.EXE
SCAM32.EXE
SCAN32.EXE
SCAN95.EXE
SCANPM.EXE
SCRSCAN.EXE
SCRSVR.EXE
SD.EXE
SERV95.EXE
SERVLCE.EXE
SERVLCES.EXE
SETUP_FLOWPROTECTOR_US.EXE
SETUPVAMEEVAL.EXE
SFC.EXE
SGSSFW32.EXE
SH.EXE
SHELLSPYINSTALL.EXE
SHN.EXE
SHOWBEHIND.EXE
SMC.EXE
SMS.EXE
SMSS32.EXE
SOAP.EXE
SOFI.EXE
SPERM.EXE
SPF.EXE
SPHINX.EXE
SPOOLCV.EXE
SPOOLSV32.EXE
SPYXX.EXE
SREXE.EXE
SRNG.EXE
SS3EDIT.EXE
SSG_4104.EXE
SSGRATE.EXE
ssgrate.exe
ST2.EXE
START.EXE
STCLOADER.EXE
SUPFTRL.EXE
SUPPORT.EXE
SUPPORTER5.EXE
SVC.EXE
SVCHOSTC.EXE
SWEEP95.EXE
SWEEPNET.SWEEPSRV.SYS.SWNETSUP.EXE
SYMPROXYSVC.EXE
SYMTRAY.EXE
SYSEDIT.EXE
SYSTEM.EXE
SYSTEM32.EXE
Systra.exe
SYSUPD.EXE
sysxp.exe
taskmanagr.exe
TASKMO.EXE
TASKMON.EXE
TAUMON.EXE
TBSCAN.EXE
TC.EXE
TCA.EXE
TCM.EXE
TDS2-98.EXE
TDS2-NT.EXE
TDS-3.EXE
TEEKIDS.EXE
TFAK.EXE
TFAK5.EXE
TGBOB.EXE
TITANIN.EXE
TITANINXP.EXE
TRACERT.EXE
TRICKLER.EXE
TRJSCAN.EXE
TRJSETUP.EXE
TROJANTRAP3.EXE
TSADBOT.EXE
TVMD.EXE
TVTMD.EXE
UNDOBOOT.EXE
UPDAT.EXE
UPDATE.EXE
UPGRAD.EXE
UTPOST.EXE
VBCMSERV.EXE
VBCONS.EXE
VBUST.EXE
VBWIN9X.EXE
VBWINNTW.EXE
VCSETUP.EXE
VET32.EXE
VET95.EXE
VETTRAY.EXE
VFSETUP.EXE
VIR-HELP.EXE
VIRUSMDPERSONALFIREWALL.EXE
VisualGuard.exe
VNLAN300.EXE
VNPC3000.EXE
VPC32.EXE
VPC42.EXE
VPFW30S.EXE
VPTRAY.EXE
VSCAN40.EXE
VSCENU6.02D30.EXE
VSCHED.EXE
VSECOMR.EXE
VSHWIN32.EXE
VSISETUP.EXE
VSMAIN.EXE
VSMON.EXE
VSSTAT.EXE
VSWIN9XE.EXE
VSWINNTSE.EXE
VSWINPERSE.EXE
W32DSM89.EXE
W9X.EXE
WATCHDOG.EXE
WEBDAV.EXE
WEBSCANX.EXE
WEBTRAP.EXE
WFINDV32.EXE
WGFE95.EXE
WHOSWATCHINGME.EXE
WIMMUN32.EXE
WIN32.EXE
WIN32US.EXE
WINACTIVE.EXE
WIN-BUGSFIX.EXE
WINDOW.EXE
WINDOWS.EXE
WININETD.EXE
WININIT.EXE
WININITX.EXE
WINLOGIN.EXE
WINMAIN.EXE
WINPPR32.EXE
WINRECON.EXE
WINSSK32.EXE
WINSTART.EXE
WINSTART001.EXE
WINTSK32.EXE
WINUPDATE.EXE
winxp.exe
WKUFIND.EXE
WNAD.EXE
WNT.EXE
wowpos32.exe
WRADMIN.EXE
WRCTRL.EXE
wuamga.exe
wuamgrd.exe
WUPDATER.EXE
WUPDT.EXE
WYVERNWORKSFIREWALL.EXE
XPF202EN.EXE
ZAPRO.EXE
ZAPSETUP3001.EXE
ZATUTOR.EXE
ZONALM2601.EXE
ZONEALARM.EXE

The worm will then delete all executable files connected with these processes, both antivirus files and other viruses which might interfere with Mydoom.y’s functionality. The worm will alter the file named %System32%\drivers\etc\hosts in the Windows directory: this results in users being unable to access the sites of antivirus companies.
The worm then attempts to download a file containing Backdoor.Win32.Surila.k, a remote administration utility, from one of the following addresses (due to security reasons we’ve changed some symbols in them to ‘xxx’):
http://www.masteratwork.com/xxx/wassup/00000008.cgi
http://www.professionals-active.com/xxx/click.dat
http://www.il-legno.it/xxx/postmsg.gif
http://www.mercyships.de/xxx/content/guestbook/data/data2.dat
http://www.llc.unibo.it/xxx/claroline/index.gif
http://www.scionicmusic.com/xxx/cover_v3.jpg
http://64.40.98.94/xxx/images/apache.gif
Once the file has been successfully downloaded, it will be saved to a directory chosen at random, under a name composed of a random number of digits. This file is then launched. A flag will also be created in the system registry, showing that the file has been successfully downloaded:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer]
dflag22=1
The worm checks for the presence of this flag; if the value shown is equal to 1, then it will not download the file a second time.
Other
This worm will cease to work when the local system date and time has passed 01.18.31 on 19th September 2004.

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This entry was posted on Thursday, December 21st, 2006 at 2:00 pm and is filed under Virus Threats.

Details
I-Worm.Mydoom.t

Mydoom.t is an Internet worm that spreads via an email attachment. It is packed with UPX; the unpacked size is about 34 KB and the compressed size is about 18 KB.
The worm is activated only if users double click on the infected attachment, whereupon the worm installs itself into the system and launches propagation routintes.
Installation
Mydoom.t copies itself into the Windows system folder under the name windrv32.exe. This file is then registered in the following autorun registry key:
[HKLM\Software\Windows\CurrentVersion\Run\]
“WinSPF”=”%SysDir%\windrv32.exe”
Mydoom.t also creates the mutex WWWWDefaceDWWW to identify itself in the system.
Infected email characterics

Sender name
Is either spoofed from the local address book on the infected machine or composed from the following components in random combinations:
first name:
last name:

Alex
Alexander
Andrew
Anthony
Barry
Bernard
Bill
Brian
Calvin
Carl
Charles
Christopher
Clifford
Daniel
David
Dennis
Donald
Douglas
Edward
Eric
Francisco
Frank
Gary
George
Gregory
Harold
Henry
James
Jason
Jay
Jeffrey
Jerry
Jim
John
Jon
Jose
Joseph
Joshua
Kenneth
Kevin
Larry
Leon
Leroy
Lloyd
Marcus
Mario
Mark
Matthew
Michael
Micheal
Miguel
Oscar
Patrick
Paul
Peter
Randall
Raymond
Richard
Ricky
Robert
Ronald
Ronnie
Scott
Stephen
Steven
Theodore
Thomas
Timothy
Tom
Tommy
Troy
Walter
William
Adams
Allen
Anderson
Baker
Brown
Campbell
Carter
Clark
Cruz
Davis
Freeman
Garcia
Gomez
Gonzalez
Green
Hall
Harris
Hernandez
Hill
Jackson
Johnson
Jones
King
Lee
Lewis
Lopez
Marshall
Martin
Martinez
Miller
Mitchell
Moore
Murray
Nelson
Ortiz
Parker
Perez
Phillips
Porter
Roberts
Robinson
Rodriguez
Scott
Simpson
Smith
Stevens
Taylor
Thomas
Thompson
Tucker
Turner
Walker
Webb
Wells
White
Williams
Wilson
Wright
Young

sender domain
Chosen at random from:
aol.com
dailymail.co.uk
gmx.net
hotmail.com
mail.com
t-online.de
yahoo.co.uk
Subject
Chosen at random from:
hello
here
Hi!
important
Information
my
News
Notice again
Private document
Re: Hello
Re: Hi
Re: Message
Re: Proof of concept
Re: Question
Re: Status
Re: Your document
read it immediately
Thank you!
thanks!
You win!
Body text
Chosen at random from:
apply patch.
apply this patch!
Can you confirm it?
For further details see the attachment.
For more details see the attachment.
fun game!
fun photos
fun!
game
I have attached document.
lol!
Monthly news report.
New game
Please answer quickly!
Please confirm the document.
Please confirm!
Please read the attached file!
Please read the attached file.
Please read the document.
Please read the important document.
Please see the attached file for details
relax
screensaverlol!
See attached file for details.
See the file.
See the file.
Thanks!
Thanks!
Virus removal tool
Waiting for a Response. Please read the attachment.
You are infected by virus. Run this exe
Your archive is attached.
Your requested mail has been attached.
Attachment name
Chosen at random from:
antivirus.exe
bill.zip
data.zip
details.zip
doc.zip
doc.zip
document.zip
file.exe
file.zip
fun.scr
game.exe
info.zip
information.zip
letter.zip
lol.scr
message,.zip
new.exe
new.zip
patch.exe
photo.exe
pic.exe
report.zip
bill.doc .pif
bill.rtf .pif
bill.txt .pif
doc.doc .pif
doc.rtf .pif
doc.txt .pif
document.doc .pif
mesg.doc .pif
mesg.rtf .pif
mesg.txt .pif
Message.html .pif
rep.txt .pif
report.doc .pif
report.rtf .pif
report.txt .pif
review.doc .pif
review.rtf .pif
review.txt .pif
Signature
Based on the following pattern:
+++ Attachment: No Virus found
+++ %s
Where “%s” is chosen at random from:
Bitdefender AntiVirus - www.bitdefender.com
F-Secure AntiVirus - www.f-secure.com
Kaspersky AntiVirus - www.kaspersky.com
MC-Afee AntiVirus - www.mcafee.com
MessageLabs AntiVirus - www.messagelabs.com
Norman AntiVirus - www.norman.com
Norton AntiVirus - www.symantec.de
Panda AntiVirus - www.pandasoftware.com
Propagation
Mydoom.t harvests addresses from the local address book and scans the machine for files with the follwoing extensions:
asp
cfg
cgi
dbx
dht
eml
htm
jsp
mht
msg
php
sht
stm
tbb
txt
uin
vbs
wab
xls

This Mydoom variant spreads by connecting directly to potential victim SMTP servers by constructing SMTP server names based on domain names it harvests from the infected machine.
Other
Mydoom.t contains a downloader function that attempts to download Backdoor.Win32.Surila from the following sites:
http://vugs.geog.uu.nl
http://www.ach.ch
http://www.hiw.kuleuven.ac.be
http://www.llc.unibo.it
http://www.mercyships.de
http://www.planetboredom.net
http://www.surrenderzeeland.nl
Mydoom.t contains the follwoing message from the coders:
We searching 4 work in AV industry.

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This entry was posted on Thursday, December 21st, 2006 at 12:00 pm and is filed under Virus Threats.

Details
I-Worm.Mydoom.q

Mydoom.q is an Internet worm that spreads via an email attachment. It is written in C++ and packed with UPX. The compressed file size is 27136 bytes and unpacked - 65024.
Installation
Once Mydoom.q is launched it copies the main component into the Windows directory under the name rasor38a.dll and into the Windows system folder under the name winpsd.exe. Finally, Mydoom.q creates the following key in the system registry:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
“winpsd”=”\winpsd.exe”
Mydoom.q also creates a mutex named 43jfds93872 to prevent duplicate infections.
Propagation
Mydoom.q scans the infected machine for files with the following extensions:
txt
htmb
shtl
phpq
aspd
dbxn
tbbg
adbh
pl
wab
Email characteristics
Subject:
photos
Body text:
LOL!;))))
Attachment name:
photos_arc.exe
Payload
Mydoom.q attempts to download Backdoor.Win32.Surila.g, a Trojan, from a list of infected sites contained in the body of the worm:
http://www.richcolour.com/ispy.x.xxx
http://www.richcolour.com/coco3.xxx
http://www.richcolour.com/guestbook/temp/temp587.xxx
http://zenandjuice.com/guestbook/temp/temp728.xxx
If the backdoor is downloaded successfully, it is saved in the Windows directory under the name winvpn32.exe and then launched. A key is also created in the system registry signaling successful installation:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer]
“InstaledFlashhMX”=”1″
Mydoom.q scans for this flag and stops attempting to download the Trojan once the flag is tagged ‘1′.
Other
Mydoom.q is programmed to stop spreading on August 20 at 21:11:11 (according to the local machine time).
However, Backdoor.Win32.Surila.g does not have an expiration date, meaning that infected machines remain open to remote adminstration unless the Trjoan is removed.

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This entry was posted on Thursday, December 21st, 2006 at 10:00 am and is filed under Virus Threats.

Details
I-Worm.Mydoom.n

This worm spreads via the Internet as an attachment to infected messages.
The worm itself is a PE EXE file of 35,328 bytes in size, packed using ASPack.
It is a copy of I-Worm.Mydoom.m, and differs only in the size of the file and the packing program used.

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This entry was posted on Thursday, December 21st, 2006 at 8:00 am and is filed under Virus Threats.

Details
I-Worm.Mydoom.m

I-Worm.Mydoom.m spreads via the Internet as an attachment to infected messages.
The worm itself is a Windows PE EXE file approximately 27KB in size, packed using UPX. The unpacked file is approximately 50KB in size.
The worm is only activated when a user opens the archive and launches the infected file by double-clicking on it. The worm will then install itself on the system and begin propagating.
The worm contains a backdoor function.
Part of the body of the worm is encrypted.
Installation
When installing, the worm copies itself as ‘java.exe’ to the Windows root directory, and registers this file in the system registry. This ensures the worm will be launched each time the infected system is booted.
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
JavaVM = %windir%\java.exe
This ensures the worm will be launched each time the infected system is booted.
The worm also creates a file named ’services.exe.’, which is 8192 bytes in size, in the Windows root directory. This file is an additional component, and is also added to the system registry:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
Services = %windir%\services.exe
Mailing messages
The worm searches the victim machine for email addresses to harvest, and then sends itself to these addresses by directly connecting to the recipient’s SMTP server.
It also harvests addresses by using the following search engines:
Google
Lycos
Altavista
Yahoo
Infected messages
Sender’s address: (either chosen from the list below or spoofed):
MAILER-DAEMON
Mail Administrator
Automatic Email Delivery Software
Post Office
The Post Office
Bounced mail
Returned mail
Mail Delivery Subsystem
Message header (chosen at random from the list below):
Message could not be delivered
hello
Hi
error
status
test
report
delivery failed
Message could not be delivered
Mail System Error - Returned Mail
Delivery reports about your e-mail
Returned mail: see transcript for details
Returned mail: Data format error
{{The|Your} m|M}essage could not be delivered
instruction
Message body (chosen at random from the list below)
The message body will be altered to correspond to the user’s details.
Dear user {$t|of $T},{ {{M|m}ail {system|server} administrator|administration} of $T would like to {inform you{ that{:|,}|}|let you know {that|the following}{.|:|,}}|||||}
{We have {detected|found|received reports} that y|Y}our {e{-|}mail |}account {has been|was} used to send a {large|huge} amount of {{unsolicited{ commercial|}|junk} e{-|}mail|spam}{ messages|} during { this|the {last|recent}} week.
{We suspect that|Probably,|Most likely|Obviously,} your computer {had been|was} {compromised|infected{ by a recent v{iru}s|}} and now {run|contain}s a {trojan{ed|}|hidden} proxy server.
{Please|We recommend {that you|you to}} follow {our |the |}instruction{s|} {in the {attachment|attached {text |}file} |}in order to keep your computer safe.
{{Virtually|Sincerely} yours|Best {wishe|regard}s|Have a nice day}, {$T {user |technical |}support team.|The $T {support |}team.}
{The|This|Your} message was{ undeliverable| not delivered} due to the following reason{(s)|}:
Your message {was not|could not be} delivered because the destination {computer|server} was {not |un}reachable within the allowed queue period. The amount of time a message is queued before it is returned depends on local configuration parameters.
Most likely there is a network problem that prevented delivery, but it is also possible that the computer is turned off, or does not have a mail system running right now.
Your message {was not|could not be} delivered within $D days: {{{Mail s|S}erver}|Host} $i is not responding.
The following recipients {did|could} not receive this message: <$t>
Please reply to postmaster@{$F|$T} if you feel this message to be in error. The original message was received at $w{ | }from {$F [$i]|{$i|[$i]}}
—– The following addresses had permanent fatal errors —– {<$t>|$t}
{—– Transcript of {the ||}session follows —– all while talking to {host |{mail |}server ||||}{$T.|$i}: {>>> MAIL F{rom|ROM}:$f <<< 50$d {$f... |}{Refused|{Access d|D}enied|{User|Domain|Address} {unknown|blacklisted}}|554 <$t>..
. {Mail quota exceeded|Message is too large} 554 <$t>… Service unavailable|550 5.1.2 <$t>… Host unknown (Name server: host not found)|554 {5. 0.0 |}Service unavailable; [$i] blocked using {relays.osirusoft.com|bl.spamcop.net}{, reason: Blocked|} Session aborted{, reason: lost connection|}|>>> RCPT To:<$t> <<< 550 {MAILBOX NOT FOUND|5.1.1 <$t>… {User unknown|Invalid recipient|Not known here}}|>>> DATA {<<< 400-aturner; %MAIL-E-OPENOUT, error opening !AS as output|}{<<< 400-aturner; -RMS-E-CRE, ACP file create failed|}{<<< 400-aturner; -SYSTEM-F-EXDISKQUOTA, disk quota exceeded|}<<< 400}|} The original message was included as attachment {{The|Your} m|M}essage could not be delivered
Attachment name:
The attachment name is generated at random.
Attachment extension (chosen at random from the list below):
cmd
bat
com
pif
scr
doc
exe
The worm may also be sent in the form of a ZIP archive.
Other
The worm opens TCP port 1034 in order to receive remote commands.

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This entry was posted on Thursday, December 21st, 2006 at 6:00 am and is filed under Virus Threats.

Details
I-Worm.Mydoom.g

This worm spreads via the Internet as an attachment to infected messages. The worm itself is a Windows PE EXE file of 32256 bytes, packed using UPX.
The worm will be launched only if the user opens the archive and executes the infected file. The worm will then install itself to the system and start propagating.
The worm includes a backdoor function, and is also coded to conduct a DoS attack on www.symantec.com and symantec.com
Once the file has been unpacked, the following text string is visible:
to netsky’s creator(s): imho, skynet is a decentralized peer-to-peer neural network. we have seen P2P in Slapper in Sinit only. they may be called skynets, but not your shitty app.
Installation
Once the worm is launched, it may open Windows Notepad, which will display a random selection of characters.
When installing, the worm copies itself under a random name, with the extension .exe or .scr to the Windows system directory. It registers this file in the system registry to ensure that the worm is launched each time Windows is started:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
““=”%System%\”
The worm creates a file with a random name and a .dll extension in the Windows system directory. This is the backdoor component. This file is also registered in the system registry:
[HKCR\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32]
““=”%System%\”
This ensures that the DLL is launched as an Explorer.exe child process.
To flag its presence in the system, the worm creates a mutex theta,. This ensures that only one copy of the worm can be launched at once.
The worm copies itself to all accessible hard disks under a random name; it also creates copies of itself in ZIP archives.
It searches all accessible hard drives for files with the extensions listed below. It then creates copies of itself under these file names, adding either an .exe or a .pif extension.
avi
doc
jpg
mp3
mp4
wav
wma
xls
Mass mailing
The mass mailing function is similar to the other versions of Mydoom, with a few insignificant differences.
Remote administration
The worm opens TCP ports 80 and 1080 to receive commands. The backdoor component can act as a proxy server, and also download and launch files.
Other
The worm is coded to detect and terminate the following processes in memory:

adaware.exe
alevir.exe
arr.exe
au.exe
avpupd
avwupd
backweb.exe
bargains.exe
beagle
belt.exe
blss.exe
bootconf.exe
bpc.exe
brasil.exe
bundle.exe
bvt.exe
cfd.exe
click
cmd32.exe
cmesys.exe
d3du
datemanager.exe
dcomx.exe
divx.exe
dllcache.exe
dllreg.exe
dpps2.exe
dssagent.exe
emsw.exe
explore.exe
fsg_4104.exe
fuck
gator.exe
gmt.exe
hbinst.exe
hbsrv.exe
hotactio
hotfix.exe
hotpatch.exe
htpatch.exe
hxdl.exe
hxiul.exe

idle.exe
iedll.exe
iedriver.exe
iexplorer.exe
inetlnfo.exe
infus.exe
infwin.exe
init.exe
intdel.exe
intren
isass.exe
istsvc.exe
jdbgmrg.exe
kazza.exe
keenvalue.exe
kernel32.exe
launcher.exe
lnetinfo.exe
loader.exe
mapisvc32.exe
md.exe
mfin32.exe
mmod.exe
mostat.exe
msapp.exe
msbb.exe
msblast.exe
mscache.exe
msccn32.exe
mscman.exe
msdm.exe
msdos.exe
msiexec16.exe
mslaugh.exe
msmgt.exe
msmsgri32.exe
msrexe.exe
mssys.exe
msvxd.exe
netd32.exe
nssys32.exe
nstask32.exe

nsupdate.exe
onsrvr.exe
optimize.exe
patch.exe
penis
pgmonitr.exe
porn
powerscan.exe
prizesurfer.exe
prmt.exe
prmvr.exe
pussy
ray.exe
rb32.exe
rcsync.exe
reged
run32dll.exe
rundll.exe
rundll16.exe
ruxdll32.exe
sahagent.exe
save.exe
savenow.exe
sc.exe
scam32.exe
scrsvr.exe
scvhost.exe
service.exe
servlce.exe
servlces.exe
showbehind.exe
sms.exe
smss32.exe
soap.exe
sperm
spoler.exe
spoolcv.exe
spoolsv32.exe
srng.exe
ssgrate.exe
start.exe
stcloader.exe

support.exe
svc.exe
svchostc.exe
svchosts.exe
svshost.exe
system.exe
system32.exe
sysupd.exe
taskmg
taskmo
teekids.exe
trickler.exe
tsadbot.exe
tvmd.exe
tvtmd.exe
updat
upgrad
utpost.
webdav.exe
win32.exe
win32us.exe
winactive.exe
win-bugsfix.exe
window.exe
windows.exe
wininetd.exe
wininit.exe
wininitx.exe
winlogin.exe
winmain.exe
winnet.exe
winppr32.exe
winservn.exe
winssk32.exe
winstart.exe
winstart001.exe
wintsk32.exe
winupdate.exe
wkufind
wnad.exe
wupdater.exe
wupdt.exe

DoS attacks
The worm searches the victim machine for the file C:\Feedlist. If it detects this file, it will attempt to conduct a DoS attack on www.symantec.com and symantec.com by sending looped multiple GET requests.

Related Posts

This entry was posted on Thursday, December 21st, 2006 at 4:00 am and is filed under Virus Threats.

Details
I-Worm.Mydoom.e

This worm has also been called Mydoom.F, and is a modification of Mydoom.a.
It spreads via the Internet as a file attached to infected messages. The worm is a PE EXE file of 33KB or slightly larger, packed using UPX. The unpacked file is approximately 55KB in size. The worm is also able to send itself as a ZIP archive.
The worm is only activated if the user opens the archive and launches the infected file, by clicking twice on the attachment. The worm then installs itself on the systems and starts propagation.
The worm includes a backdoor function, and is programmed to carry out DoS attacks on www.microsoft.com and www.riaa.com
Everything points to this worm not being an original creation, but a separate version which has been created around the orignal source code of Mydoom.a. Part of the original code is present in this version, even though it serves no useful function.
Installation
Once launched, the worm may display a fake error message on the screen: ‘File is corrupted,’ ‘File cannot be opened,’ or ‘Unable to open specified file’.
The worm may also create a file in the temporary system directory. This file contains a random selection of characters, and the worm may open it using Notepad.
It also creates a mutex ‘jmydoat name of infected computer Xmtx’ to flag its presence in the system.
When installing, the worm copies itself under a random name to the Windows system directory and registers this file in the system registry auto-run key:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
random characters = “%System%\name of worm file
The worm then searchs all accessible disks from C: to Z: and copies itself under random names to all disks which it finds which include the words
shar
startup
start
in the name.
The worm creates a file with a random name and .dll extension in the Windows system directory. This file is 9724 bytes in size, and is the backdoor component, which is intended to open a backdoor on port 1080 and act as a proxy server.
The worm creates several copies of itself as ZIP archives in the Windows root directory. These files are then used to send mass emails. In order to flag its presence in the system, the worm also creates several additional keys in the system registry:
HKLM\Software\Microsoft\Windows\CurrentVersion\Shell HKCU\Software\Microsoft\Windows\CurrentVersion\Shell
Sending of email
In order to send copies of itself, the worm searches all accessible disks from C: to Z: for files with the following extensions:
wab
mbx
nch
mmf
ods
rtf
uin
oft
mht
vbs
msg
pl
eml
adb
tbb
dbx
asp
php
sht
htm
txt
It then sends itself to all email addresses found in these files.
Infected emails have the following characteristics:
Sender’s address: any address found on the infected machine, or chosen from the following list
jerry
bill
smith
jim
sam
james
alex
A random selection of characters may also be used. In this case, after the @ symbol in the sender’s address, one of the following domains will be used:
aol.com
msn.com
yahoo.com
hotmail.com
edu
Message header: (chosen at random)
hello
hi
Announcement
read now!
forget
bug
unknown
fake
Wanted
recent news
news
stolen
Attention
Accident
Schedule
Re: Thank you
Thank you
Re: Details
Details
Re: Approved
Approved
hi, it’s me
Important
Readme
Read this message
please read
please reply
Thank You very very much
You use illegal File Sharingall
Your IP was logged
Your account is about to be expired
Love is
Love is…
Undeliverable message
Re:
Your order was registered
Your request was registered
Your order is being processed
Your request is being processed
Current Status
Your credit card
Read it immediately!
Read this
Read it immediately
Something for you
For you
For your information
Information
Warning
You have 1 day left
automatic notification
automatic responder
Notification
Expired account
Your account has expired
Registration confirmation
Confirmation
Confirmation Required
Returned Mail
Message body: (chosen at random)
Greetings
See you
Here it is
You are bad
Take it
Reply
Please, reply
Okay
OK
Everything ok?
Check the attached document.
The document was sent in compressed format.
Please see the attached file for details
See the attached file for details
Details are in the attached document. You need Microsoft Office to open it. Information about you
We have received this document from your e-mail.
Kill the writer of this document!
Something about you
I have your password
You are a bad writer
Is that yours?
Is that from you?
I wait for your reply.
Here is the document.
Read the details.
I’m waiting
Attachment name: (chosen at random)
body
message
test
data
file
text
readme
document
doc
msg
photo
resume
image
object
website
friend
jokes
joke
approved
paypal
disc
misc
part3
part2
part4
part1
mail2
list
mail
story
about
money
check
product
notes
your_document
note
information
textfile
posting
post
stuff
attachment
creditcard
details
or a selection of random characters.
The attached file has one of the following extensions:
exe
scr
com
pif
bat
cmd
zip
and a second extension from the following list:
doc
htm
rtf
xls
jpg
gif
png
txt
exe
pif
scr
DoS attacks
If the system date is showing between the 17th and the 22nd of the month, there is a 60% that the worm will carry out a DoS attack on www.microsoft.com and a 30% chance that it will carry out a DoS attack on www.riaa.com. Mydoom.e will perform DoS attacks in exactly the same way as the other versions of Mydoom did, by sending multiple GET requests to port 80 of the site under attack.
Deletion of files
The worm searches all accessible disks from C: to Z: for files with the extensions .mdb, .doc, .xls, .sav, .jpg, .avi and .bmp and uses a random number generator to determine which files with these extensions should be deleted.
Other
The worm searches memory for processes containing the following text:
reged
taskmo
taskmg avp.
avp32
norton
navapw
navw3
intrena
mcafe
and attempts to stop them.

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This entry was posted on Thursday, December 21st, 2006 at 2:00 am and is filed under Virus Threats.

Details
I-Worm.Mydoom.b
Mydoom.b is a modification of Mydoom.a that spreads via the Internet in the form of files attached to infected messages and via the Kazaa file-sharing network. The worm itself is a Windows PE EXE file of 29184 bytes, compressed using UPX and PE-Patch. The decompressed file is approximately 49KB in size.
The worm is activated only if the user opens the archive and launches the infected file by double-clicking on the attachment. The worm then installs itself in the system and starts the replication process.
The worm contains a backdoor function, and is also programmed to carry out DoS attacks on the sites www.sco.com and www.microsoft.com.
Part of the body of the worm is encrypted.
The unpacked file contains the following text:
(sync-1.01; andy; I’m just doing my job, nothing personal, sorry)
Installation
Following launch, the worm opens Windows Notepad, showing a random selection of symbols:
During installation, the worm copies itself under the name explorer.exe to the Windows system directory, and registers this file in the system registry auto-run key:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
“TaskMon” = “%System%\explorer.exe”
The worm creates the file ctfmon.dll in the Windows system directory which is a backdoor component (a proxy server) and also registers this in the system registry:
[HKCR\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32]
“Apartment” = “%SysDir%\ctfmon.dll”
Ctfmon.dll will therefore launch as a procedure linked to Explorer.exe.
The worm also creates a file called Body in the temporary directory (usually in %windir%\temp). This file contains a random selection of symbols.
So that the worm can identify itself in the system, it creates several additional keys in the system registry:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\Version]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\Version]
While running it also creates a unique identifier sync-v1.01__ipcmtx0.
Mydoom.b replaces the standard file ‘hosts’ in the Windows directory into with its own version (under the same name). This file will now prevent user access to the following domains:
ad.doubleclick.net
ad.fastclick.net
ads.fastclick.net
ar.atwola.com
atdmt.com
avp.ch
avp.com
avp.ru
awaps.net
banner.fastclick.net
banners.fastclick.net
ca.com
click.atdmt.com
clicks.atdmt.com
dispatch.mcafee.com
download.mcafee.com
download.microsoft.com
downloads.microsoft.com
engine.awaps.net
fastclick.net
f-secure.com
ftp.f-secure.com
ftp.sophos.com
go.microsoft.com
liveupdate.symantec.com
mast.mcafee.com
mcafee.com
media.fastclick.net
msdn.microsoft.com
my-etrust.com
nai.com
networkassociates.com
office.microsoft.com
phx.corporate-ir.net
secure.nai.com
securityresponse.symantec.com
service1.symantec.com
sophos.com
spd.atdmt.com
support.microsoft.com
symantec.com
update.symantec.com
updates.symantec.com
us.mcafee.com
vil.nai.com
viruslist.ru
windowsupdate.microsoft.com
www.avp.ch
www.avp.com
www.avp.ru
www.awaps.net
www.ca.com
www.fastclick.net
www.f-secure.com
www.kaspersky.ru
www.mcafee.com
www.my-etrust.com
www.nai.com
www.networkassociates.com
www.sophos.com
www.symantec.com
www.trendmicro.com
www.viruslist.ru
www3.ca.com

Mailing letters
Emails are sent in the same way that Mydoom.a uses except for the following changes.
The body text is chosen at random from the following:
The message cannot be represented in 7-bit ASCII encoding
and has been sent as a binary attachment

sendmail daemon reported: Error #804 occured during SMTP session.
Partial message has been received

The message contains Unicode characters and
has been sent asa binary attachment.

The message contains MIME-encoded graphics and
has been sent as a binary attachment

Mail transaction failed. Partial message is available.
Mydoom.b might also send emails with random strings of characters in the subject, body and attachment name.
Propagation via P2P
The worm checks for the presence of a Kazaa client on the computer and copies itself to the file-sharing directory under the following names:
NessusScan_pro
attackXP-1.26
winamp5
MS04-01_hotfix
zapSetup_40_148
BlackIce_Firewall_Enterpriseactivation_crack
xsharez_scanner
icq2004-final
with the following extensions:
bat
exe
scr
pif

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This entry was posted on Thursday, December 21st, 2006 at 12:00 am and is filed under Virus Threats.

Details
I-Worm.Mydoom.a
Also known as Novarg.
This worm spreads via the Internet in the form of files attached to infected messages. It also spreads via the file sharing network Kazaa. The worm itself is a Windows PE EXE file of 22528 bytes, compressed using UPX. The decompressed file is approximately 40KB in size.
The worm is activated only if the user opens the archive and launches the infected file by double-clicking on the attachment. The worm then installs itself in the system and starts the replication process.
The worm contains a backdoor function, and is also programmed to carry out DoS attacks on the site www.sco.com on 1st February 2004.
Part of the body of the worm is encrypted.
Installation
Following launch, the worm opens Windows Notepad, showing a random selection of symbols:

During installation, the worm copies itself under the name taskmon.exe to the Windows system directory, and registers this file in the system registry auto-run key:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
“TaskMon” = “%System%\taskmon.exe”
The worm creates a file shimgapi.dll in the Windows system directory which is a backdoor component (a proxy server) and also registers this in the system registry:
[HKCR\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32]
“(Default)” = “%SysDir%\shimgapi.dll”
Shimgapi.dll will therefore launch as a procedure linked to Explorer.exe.
The worm also creates a file called Message in the temporary directory (usually in windir\temp). This file contains a random selection of symbols.
So that the worm can identify itself in the system, it creates several additional keys in the system registry:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\Version]
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\Version]
While running it also creates a unique identifier SwebSipxSmtxSO.
Mailing of messages
When sending infected messages the worm uses its own SMTP engine. The worm attempts to connect directly to the recipient mail server.
In order to find email addresses to send infected messages to, the worm searches for files with the following extensions:
asp
dbx
tbb
htm
sht
php
adb
pl
wab
txt
and gathers email addresses found in these files. The worm ignores addresses with the suffix .edu.
Infected messages have the following characteristics:

Sender’s address:
random
Message header: (chosen at random from the following list)
test
hi
hello
Mail Delivery System
Mail Transaction Failed
Server Report
Status
Error
Message body: (chosen at random from the following list)
test

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.
Attachment name: (may be one word from the list below, or two words from the list below joined by an underscore)
document
readme
doc
text
file
data
test
message
body
The attachment may have one of the following extensions:
pif
scr
exe
cmd
bat
The worm may also send messages with a meaningless selection of characters in the message head, message body or attachment name.
Replication via P2P
The worm checks for the presence of a Kazaa client on the computer and copies itself to the file-sharing directory under the following names:
winamp5
icq2004-final
activation_crack
strip-girl-2.0bdcom_patches
rootkitXP
office_crack
nuke2004
with the following extensions:
bat
exe
scr
pif
Other
Shimgapi.dll is a proxy-server; the worm opens a TCP port between 3127 and 3198 on the infected machine in order to receive commands. The backdoor function allows the creator of the worm to gain full access to the system. In addition to this, the backdoor can execute random files downloaded from the Internet.
The worm also contains a function which enables it to carry out DoS attacks on the site www.sco.com. This function should activate on the 1st February and continue to work until 12th Febuary 2004. The worm will send a GET request every millisecond to port 80 of the site being attacked, which under the conditions of a global epidemic may lead to total breakdown of the site.

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This entry was posted on Wednesday, December 20th, 2006 at 6:00 pm and is filed under Virus Threats.