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Win32.Mydoom.BA@mm

MEDIUM
LOW
33280 bytes
(Mytob)

Symptoms

- Internet Firewall in XP SP2 disabled. 
- Presence of a file named “scrigz.exe” in the Windows\System directory.
- Some Windows and security programs stop working unexplicably.

Removal instructions:

Please let BitDefender disinfect your files.

Analyzed By

Daniel Ionita, virus researcher

Technical Description:

This virus is another variant of the (now very large) Mytob/Mydoom family. This is possible because the sources of a previous variant have been leaked on the Internet.

At startup the virus copies itself in the %sysdir% directory under the name “scrigz.exe”. It adds itself in the HKLM\Software\Microsoft\Windows\CurrentVersion\Run and Runservices keys to ensure start at every system startup.

It then lowers the IE security settings and disables shared access in the Windows Firewall.

With the system security compromised, the virus will then create several threads, each with various functions:

 

- Monitor the virus entries in the system registry, restoring them as needed periodically.

- Search and harvest e-mail addresses from files with the extensions: htm, adb, tbb, asp, php, xml, cgi, jsp, sht, html.

- Connect to a SMTP server obtained from the concatenation of one of his internal strings (gate., ns., relay., mail1., mxs., mx1., smtp., mail., mx.) and domain names extracted from the harvested e-mail addresses and send e-mails with his own SMTP engine. The virus will search for a SMTP server in the settings of Outlook Express also if it is defined.

- Connect to an IRC server and a channel and wait commands from the virus creator. Commands include various information about the system, and also the possibility to download and run malware indicated by the virus creator.

- Monitor a list of processes and kill them whenever they’re active. This is done by acquiring the “SeDebugPrivilege” prior to scanning for processes

The virus will overwrite the %sysdir%\Drivers\Etc\hosts file, disabling the updates of certain AV programs and access to various security related web-sites.

E-mail format is chosen at random from various templates:

From: (spoofed).
Subject: (one of the following)

 

Notice of account limitation Email Account Suspension Security measures Members 
Support Important Notification Warning Message: Your services near to be closed.
Your Account is Suspended For Security Reasons *DETECTED* Online User Violation
Your Account is Suspended Your new account password is approved You have
successfully updated your password Your password has been successfully updated
Your password has been updated Message body: (one of the following)
1. Dear (random) Member,
We have temporarily suspended your email account (random). This might be due to either of the following reasons:
1. A recent change in your personal information (i.e. change of address).
2. Submiting invalid information during the initial sign up process.
3. An innability to accurately verify your selected option of subscription due to an internal error within our processors. See the details to reactivate your (random) account.

Sincerely,
The (random) Support Team

Attachment: No Virus (Clean)
(random) Antivirus www.(random).com
2. Dear user (random),

You have successfully updated the password of your (random) account.
If you did not authorize this change or if you need assistance with your account, please contact (random) customer service at: (random)

Thank you for using (random)!
The (random) Support Team

Attachment: No Virus (Clean)
(random) Antivirus - www.(random).com

3. Dear user (random), It has come to our attention that your (random) User Profile ( x ) records are out of date. For further details see the attached document.
Thank you for using (random)!
The (random) Support Team

+++ Attachment: No Virus (Clean)
+++ (random) Antivirus - www.(random).com

4. Dear (random) Member,

Your e-mail account was used to send a huge amount of unsolicited spam messages during the recent week. If you could please take 5-10 minutes out of your online experience and confirm the attached document so you will not run into any future problems with the online service.

If you choose to ignore our request, you leave us no choice but to cancel your membership.
Virtually yours,
The (random) Support Team
Attachment: No Virus found

Attachement name: (one of the following)

account-report 
readme
document
account-info
email-details
account-details
important-details
accepted-password
account-password
approved-password
password
new-password
email-password
updated-password
concatenated with a neutral extension (doc, txt, htm, tmp) and then with an executable one (exe, scr, bat, cmd, pif, zip).

The virus will monitor and kill all processes that have these names:

NEC.EXE
TASKMGR.EXE
CMD.EXE
_AVPM.EXE
_AVPCC.EXE
_AVP32.EXE
ZONEALARM.EXE
ZONALM2601.EXE
ZATUTOR.EXE
ZAPSETUP3001.EXE
ZAPRO.EXE
XPF202EN.EXE
WYVERNWORKSFIREWALL.EXE
WUPDT.EXE
WUPDATER.EXE
WSBGATE.EXE
WRCTRL.EXE
WRADMIN.EXE
WNT.EXE
WNAD.EXE
WKUFIND.EXE
WINUPDATE.EXE
WINTSK32.EXE
WINSTART001.EXE
WINSTART.EXE
WINSSK32.EXE
WINSERVN.EXE
WINRECON.EXE
WINPPR32.EXE
WINNET.EXE
WINMAIN.EXE
WINLOGIN.EXE
WININITX.EXE
WININIT.EXE
WININETD.EXE
WINDOWS.EXE
WINDOW.EXE
WINACTIVE.EXE
WIN32US.EXE
WIN32.EXE
WIN-BUGSFIX.EXE
WIMMUN32.EXE
WHOSWATCHINGME.EXE
WFINDV32.EXE
WEBTRAP.EXE
WEBSCANX.EXE
WEBDAV.EXE
WATCHDOG.EXE
W9X.EXE
W32DSM89.EXE
VSWINPERSE.EXE
VSWINNTSE.EXE
VSWIN9XE.EXE
VSSTAT.EXE
VSMON.EXE
VSMAIN.EXE
VSISETUP.EXE
VSHWIN32.EXE
VSECOMR.EXE
VSCHED.EXE
VSCENU6.02D30.EXE
VSCAN40.EXE
VPTRAY.EXE
VPFW30S.EXE
VPC42.EXE
VPC32.EXE
VNPC3000.EXE
VNLAN300.EXE
VIRUSMDPERSONALFIREWALL.EXE
VIR-HELP.EXE
VFSETUP.EXE
VETTRAY.EXE
VET95.EXE
VET32.EXE
VCSETUP.EXE
VBWINNTW.EXE
VBWIN9X.EXE
VBUST.EXE
VBCONS.EXE
VBCMSERV.EXE
UTPOST.EXE
UPGRAD.EXE
UPDATE.EXE
UPDAT.EXE
UNDOBOOT.EXE
TVTMD.EXE
TVMD.EXE
TSADBOT.EXE
TROJANTRAP3.EXE
TRJSETUP.EXE
TRJSCAN.EXE
TRICKLER.EXE
TRACERT.EXE
TITANINXP.EXE
TITANIN.EXE
TGBOB.EXE
TFAK5.EXE
TFAK.EXE
TEEKIDS.EXE
TDS2-NT.EXE
TDS-3.EXE
TCM.EXE
TCA.EXE
TC.EXE
TBSCAN.EXE
TAUMON.EXE
TASKMON.EXE
TASKMO.EXE
TASKMG.EXE
SYSUPD.EXE
SYSTEM32.EXE
SYSTEM.EXE
SYSEDIT.EXE
SYMTRAY.EXE
SYMPROXYSVC.EXE
SWEEPNET. SWEEPSRV.SYS SWNETSUP.EXE
SWEEP95.EXE
SVSHOST.EXE
SVCHOSTS.EXE
SVCHOSTC.EXE
SVC.EXE
SUPPORTER5.EXE
SUPPORT.EXE
SUPFTRL.EXE
STCLOADER.EXE
START.EXE
ST2.EXE
SSG_4104.EXE
SSGRATE.EXE
SS3EDIT.EXE
SRNG.EXE
SREXE.EXE
SPYXX.EXE
SPOOLSV32.EXE
SPOOLCV.EXE
SPOLER.EXE
SPHINX.EXE
SPF.EXE
SPERM.EXE
SOFI.EXE
SOAP.EXE
SMSS32.EXE
SMS.EXE
SMC.EXE
SHOWBEHIND.EXE
SHN.EXE
SHELLSPYINSTALL.EXE
SH.EXE
SGSSFW32.EXE
SFC.EXE
SETUP_FLOWPROTECTOR_US.EXE
SETUPVAMEEVAL.EXE
SCRSCAN.EXE
SCANPM.EXE
SCAN95.EXE
SCAN32.EXE
SCAM32.EXE
SC.EXE
SBSERV.EXE
SAVENOW.EXE
SAVE.EXE
SAHAGENT.EXE
SAFEWEB.EXE
RUXDLL32.EXE
RUNDLL16.EXE
RUNDLL.EXE
RUN32DLL.EXE
RULAUNCH.EXE
RTVSCN95.EXE
RTVSCAN.EXE
RSHELL.EXE
RRGUARD.EXE
RESCUE32.EXE
RESCUE.EXE
REGEDT32.EXE
REGEDIT.EXE
REGED.EXE
REALMON.EXE
RCSYNC.EXE
RB32.EXE
RAY.EXE
RAV8WIN32ENG.EXE
RAV7WIN.EXE
RAV7.EXE
RAPAPP.EXE
QSERVER.EXE
QCONSOLE.EXE
PURGE.EXE
PSPF.EXE
PROTECTX.EXE
PROPORT.EXE
PROGRAMAUDITOR.EXE
PROCEXPLORERV1.0.EXE
PROCESSMONITOR.EXE
PROCDUMP.EXE
PRMVR.EXE
PRMT.EXE
PRIZESURFER.EXE
PPVSTOP.EXE
PPTBC.EXE
PPINUPDT.EXE
POWERSCAN.EXE
PORTMONITOR.EXE
PORTDETECTIVE.EXE
POPSCAN.EXE
POPROXY.EXE
POP3TRAP.EXE
PLATIN.EXE
PINGSCAN.EXE
PGMONITR.EXE
PFWADMIN.EXE
PF2.EXE
PERSWF.EXE
PERSFW.EXE
PERISCOPE.EXE
PDSETUP.EXE
PCSCAN.EXE
PCIP10117_0.EXE
PCFWALLICON.EXE
PAVW.EXE
PAVSCHED.EXE
PAVPROXY.EXE
PAVCL.EXE
PATCH.EXE
PANIXK.EXE
PADMIN.EXE
OUTPOSTPROINSTALL.EXE
OUTPOSTINSTALL.EXE
OUTPOST.EXE
OTFIX.EXE
OSTRONET.EXE
OPTIMIZE.EXE
ONSRVR.EXE
OLLYDBG.EXE
NWTOOL16.EXE
NWSERVICE.EXE
NWINST4.EXE
NVSVC32.EXE
NVC95.EXE
NVARCH16.EXE
NUPGRADE.EXE
NUI.EXE
NTXconfig.EXE
NTVDM.EXE
NTRTSCAN.EXE
NT.EXE
NSUPDATE.EXE
NSTASK32.EXE
NSSYS32.EXE
NSCHED32.EXE
NPSSVC.EXE
NPSCHECK.EXE
NPROTECT.EXE
NPFMESSENGER.EXE
NPF40_TW_98_NT_ME_2K.EXE
NOTSTART.EXE
NORTON_INTERNET_SECU_3.0_407.EXE
NORMIST.EXE
NOD32.EXE
NMAIN.EXE
NISUM.EXE
NISSERV.EXE
NETUTILS.EXE
NETSTAT.EXE
NETSPYHUNTER-1.2.EXE
NETSCANPRO.EXE
NETMON.EXE
NETINFO.EXE
NETD32.EXE
NETARMOR.EXE
NEOWATCHLOG.EXE
NEOMONITOR.EXE
NDD32.EXE
NCINST4.EXE
NC2000.EXE
NAVWNT.EXE
NAVW32.EXE
NAVSTUB.EXE
NAVNT.EXE
NAVLU32.EXE
NAVDX.EXE
NAVAPW32.EXE
NAVAPSVC.EXE
NAVAP.NAVAPSVC.EXE
AUTO-PROTECT.NAV80TRY.EXE
NAV.EXE
N32SCANW.EXE
MWATCH.EXE
MU0311AD.EXE
MSVXD.EXE
MSSYS.EXE
MSSMMC32.EXE
MSMSGRI32.EXE
MSMGT.EXE
MSLAUGH.EXE
MSINFO32.EXE
MSIEXEC16.EXE
MSDOS.EXE
MSDM.EXE
MSCONFIG.EXE
MSCMAN.EXE
MSCCN32.EXE
MSCACHE.EXE
MSBLAST.EXE
MSBB.EXE
MSAPP.EXE
MRFLUX.EXE
MPFTRAY.EXE
MPFSERVICE.EXE
MPFAGENT.EXE
MOSTAT.EXE
MOOLIVE.EXE
MONITOR.EXE
MMOD.EXE
MINILOG.EXE
MGUI.EXE
MGHTML.EXE
MGAVRTE.EXE
MGAVRTCL.EXE
MFWENG3.02D30.EXE
MFW2EN.EXE
MFIN32.EXE
MD.EXE
MCVSSHLD.EXE
MCVSRTE.EXE
MCUPDATE.EXE
MCTOOL.EXE
MCSHIELD.EXE
MCMNHDLR.EXE
MCAGENT.EXE
MAPISVC32.EXE
LUSPT.EXE
LUINIT.EXE
LUCOMSERVER.EXE
LUAU.EXE
LUALL.EXE
LSETUP.EXE
LORDPE.EXE
LOOKOUT.EXE
LOCKDOWN2000.EXE
LOCKDOWN.EXE
LOCALNET.EXE
LOADER.EXE
LNETINFO.EXE
LDSCAN.EXE
LDPROMENU.EXE
LDPRO.EXE
LDNETMON.EXE
LAUNCHER.EXE
KILLPROCESSSETUP161.EXE
KERNEL32.EXE
KERIO-WRP-421-EN-WIN.EXE
KERIO-WRL-421-EN-WIN.EXE
KERIO-PF-213-EN-WIN.EXE
KEENVALUE.EXE
KAZZA.EXE
KAVPF.EXE
KAVPERS40ENG.EXE
KAVLITE40ENG.EXE
JEDI.EXE
JDBGMRG.EXE
JAMMER.EXE
ISTSVC.EXE
IOMON98.EXE
INTREN.EXE
INTDEL.EXE
INIT.EXE
INFWIN.EXE
INFUS.EXE
INETLNFO.EXE
IFW2000.EXE
IFACE.EXE
IEXPLORER.EXE
IEDRIVER.EXE
IEDLL.EXE
IDLE.EXE
ICSUPPNT.EXE
ICSUPP95.EXE
ICMON.EXE
ICLOADNT.EXE
IBMAVSP.EXE
IBMASN.EXE
IAMSTATS.EXE
IAMSERV.EXE
IAMAPP.EXE
HXIUL.EXE
HXDL.EXE
HWPE.EXE
HTPATCH.EXE
HTLOG.EXE
HOTPATCH.EXE
HOTACTIO.EXE
HBSRV.EXE
HBINST.EXE
HACKTRACERSETUP.EXE
GUARDDOG.EXE
GUARD.EXE
GMT.EXE
GENERICS.EXE
GBPOLL.EXE
GBMENU.EXE
GATOR.EXE
FSMB32.EXE
FSMA32.EXE
FSM32.EXE
FSGK32.EXE
FSAV95.EXE
FSAV530WTBYB.EXE
FSAV530STBYB.EXE
FSAV32.EXE
FSAV.EXE
FSAA.EXE
FRW.EXE
FPROT.EXE
FP-WIN_TRIAL.EXE
FP-WIN.EXE
FNRB32.EXE
FIREWALL.EXE
FINDVIRU.EXE
FIH32.EXE
FCH32.EXE
FAST.EXE
FAMEH32.EXE
F-STOPW.EXE
F-PROT95.EXE
F-PROT.EXE
EXPLORE.EXE
EXPERT.EXE
EXE.AVXW.EXE
EXANTIVIRUS-CNET.EXE
EVPN.EXE
ETRUSTCIPE.EXE
ETHEREAL.EXE
ESPWATCH.EXE
ESCANV95.EXE
ESCANHNT.EXE
ESAFE.EXE
ENT.EXE
EMSW.EXE
EFPEADM.EXE
ECENGINE.EXE
DVP95_0.EXE
DVP95.EXE
DSSAGENT.EXE
DRWEBUPW.EXE
DRWEB32.EXE
DRWATSON.EXE
DPPS2.EXE
DPFSETUP.EXE
DPF.EXE
DOORS.EXE
DLLREG.EXE
DLLCACHE.EXE
DIVX.EXE
DEPUTY.EXE
DEFWATCH.EXE
DEFSCANGUI.EXE
DEFALERT.EXE
DCOMX.EXE
DATEMANAGER.EXE
CLAW95CF.EXE
CWNTDWMO.EXE
CWNB181.EXE
CV.EXE
CTRL.EXE
CPFNT206.EXE
CPF9X206.EXE
CPD.EXE
CONNECTIONMONITOR.EXE
CMON016.EXE
CMGRDIAN.EXE
CMESYS.EXE
CMD32.EXE
CLICK.EXE
CLEANPC.EXE
CLEANER3.EXE
CLEANER.EXE
CLEAN.EXE
CFINET32.EXE
CFINET.EXE
CFIAUDIT.EXE
CFIADMIN.EXE
CFGWIZ.EXE
CFD.EXE
CDP.EXE
CCPXYSVC.EXE
CCEVTMGR.EXE
CCAPP.EXE
BVT.EXE
BUNDLE.EXE
BS120.EXE
BRASIL.EXE
BPC.EXE
BORG2.EXE
BOOTWARN.EXE
BOOTCONF.EXE
BLSS.EXE
BLACKICE.EXE
BLACKD.EXE
BISP.EXE
BIPCPEVALSETUP.EXE
BIPCP.EXE
BIDSERVER.EXE
BIDEF.EXE
BELT.EXE
BEAGLE.EXE
BD_PROFESSIONAL.EXE
BARGAINS.EXE
BACKWEB.EXE
AVXQUAR.EXE
AVXMONITORNT.EXE
AVXMONITOR9X.EXE
AVWUPSRV.EXE
AVWUPD32.EXE
AVWUPD.EXE
AVWINNT.EXE
AVSYNMGR.EXE
AVSCHED32.EXE
AVPUPD.EXE
AVPTC32.EXE
AVPM.EXE
AVPDOS32.EXE
AVPCC.EXE
AVP32.EXE
AVP.EXE
AVNT.EXE
AVLTMAIN.EXE
AVKWCTl9.EXE
AVKSERVICE.EXE
AVKSERV.EXE
AVKPOP.EXE
AVGW.EXE
AVGUARD.EXE
AVGSERV9.EXE
AVGSERV.EXE
AVGNT.EXE
AVGCTRL.EXE
AVGCC32.EXE
AVE32.EXE
AVCONSOL.EXE
AUTOUPDATE.EXE
AUTOTRACE.EXE
AUTODOWN.EXE
AUPDATE.EXE
AU.EXE
ATWATCH.EXE
ATUPDATER.EXE
ATRO55EN.EXE
ATGUARD.EXE
ATCON.EXE
ARR.EXE
APVXDWIN.EXE
APLICA32.EXE
APIMONITOR.EXE
ANTS.EXE
ANTIVIRUS.EXE
ANTI-TROJAN.EXE
AMON9X.EXE
ALOGSERV.EXE
ALEVIR.EXE
ALERTSVC.EXE
AGENTW.EXE
AGENTSVR.EXE
ADVXDWIN.EXE
ADAWARE.EXE
ACKWIN32.EXE

The virus will not send e-mails to addresses that contain of the following strings:

 

accoun
certific
listserv
ntivi
support
icrosoft
admin
page
the.bat
gold-certs
feste
submit
help
service
privacy
somebody
soft
contact
site
rating
bugs
your
someone
anyone
nothing
nobody
noone
webmaster
postmaster
samples
info
root
be_loyal:
mozilla
utgers.ed
tanford.e
acketst
secur
isc.o
isi.e
ripe.
arin.
sendmail
rfc-ed
ietf
iana
usenet
fido
linux
kernel
google
ibm.com
fsf.
mit.e
math
unix
berkeley
foo.
.mil
gov.
.gov
ruslis
nodomai
mydomai
example
inpris
borlan
sopho
panda
hotmail
msn.
icrosof
syma
.edu
abuse