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This file is a polymorphic dropper, which sends infected messages and infected files. The encryption algorithm used means that the size of the file varies.
Characteristics of infected messages:
Sender's address (chosen at random from the list below):
management administration staff noreply support
The domain of the recipient of the infected message will be used as the sender's domain.
Message header (chosen at random from the list below):
Account notify E-mail account disabling warning. E-mail account security warning. E-mail technical support message. E-mail technical support warning. E-mail warning Email account utilization warning. Email report Encrypted document Fax Message Received Forum notify Hidden message Important notify Important notify about your e-mail account. Incoming message Notify about using the e-mail account. Notify about your e-mail account utilization. Notify from e-mail technical support. Protected message RE: Protected message RE: Text message Re: Document Re: Hello Re: Hi Re: Incoming Fax Re: Incoming Message Re: Msg reply Re: Thank you! Re: Thanks :) Re: Yahoo! Request response Site changes
Message body (in several parts, chosen at random from the list below):
Part 1:
Dear user of , Dear user of gateway e-mail server gateway, Dear user of e-mail server, Hello user of e-mail server, Dear user of mailing system, Dear user, the management of mailing system wants to let you know that,
Part 2:
Your e-mail account has been temporary disabled because of unauthorized access.
Our main mailing server will be temporary unavaible for next two days,to continue receiving mail in these days you have to configure our free auto-forwarding service.
Your e-mail account will be disabled because of improper using in next three days, if you are still wishing to use it, please, resign your account information.
We warn you about some attacks on your e-mail account. Your computer may contain viruses, in order to keep your computer and e-mail account safe, please, follow the instructions.
Our antivirus software has detected a large ammount of viruses outgoing from your email account, you may use our free anti-virus tool to clean up your computer software.
Some of our clients complained about the spam (negative e-mail content) outgoing from your e-mail account. Probably, you have been infected by a proxy-relay trojan server. In order to keep your computer safe, follow the instructions.
Part 3:
For more information see the attached file. Further details can be obtained from attached file. Advanced details can be found in attached file. For details see the attach. For details see the attached file. For further details see the attach. Please, read the attach for further details. Pay attention on attached file.Read the attach. Your file is attached. More info in attach See attach. Follow the wabbit. Find the white rabbit. Please, have a look at the attached file. See the attached file for details. Message is in attach Here is the file.
Part 4:
The team http:/ /www.recipient's domain name
Part 5:
The Management, Sincerely, Best wishes, Have a good day, Cheers, Kind regards,
Attachment name:
Attach Details Document Encrypted Gift Info Information Message MoreInfo Readme Text TextDocument details first_part pub_document text_document random name with the extension EXE or PIF random name with the extension ZIP or RARThe attached archived may be password protected. In such cases, the worm inserts a BMP, GIF, or JPG format picture which includes a graphical representation of the password into the message body. Such messages contain additional text (chosen at random from the list below):
For security reasons attached file is password protected. The password is For security purposes the attached file is password protected. Password -- Note: Use password to open archive. Attached file is protected with the password for security reasons. Password is In order to read the attach you have to use the following password: Archive password: Password - Password:
Installation
Once launched, the worm copies itself and its components to the Windows system directory under the following names:winupd.exe winupd.exeopen winupd.exeopenopen (a copy of the worm in a password protected archive) winupd.exeopenopenopen (BMP,GIF or JPG file containing the archive password)and registers winupd.exe in the system registry auto-run key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] winupd.exe=%System%\winupd.exeThe worm searches the system registry for several keys installed by other worms, such as Netsky, and deletes them.
9XHtProtect Antivirus HtProtect ICQ Net ICQNet My AV Special Firewall Service Tiny AV Zone Labs Client Ex service
Propagation
The worm searches for files with the following extensions:adb asp cfg cgi dbx dhtm eml htm jsp mbx mdx mht mmf msg nch ods oft php pl sht shtm stm tbb txt uin wab wsh xls xmland sends copies of itself to all email addresses harvested from these folders. The worm uses its own SMTP server to send messages.
The worm does not send itself to addresses containing the following text:
@avp. @foo @hotmail.com @iana @messagelab @microsoft @msn abuse admin anyone@ bsd bugs@ cafee certific contract@ f-secur feste free-av gold-certs@ google help@ icrosoft info@ kasp linux listserv local nobody@ noone@ noreply ntivi panda pgp postmaster@ rating@ root@ samples sopho spam support unix winrar winzip
Propagation via P2P
The worm searches for folders containing the word 'shar' and copies itself several times to all folders found under the following names:ACDSee 9.exe Adobe Photoshop 9 full.exe Ahead Nero 7.exe Matrix 3 Revolution English Subtitles.exe Microsoft Office 2003 Crack, Working!.exe Microsoft Office XP working Crack, Keygen.exe Microsoft Windows XP, WinXP Crack, working Keygen.exe Opera 8 New!.exe Porno Screensaver.scr Porno pics arhive, xxx.exe Porno, sex, oral, anal cool, awesome!!.exe Serials.txt.exe WinAmp 5 Pro Keygen Crack Update.exe WinAmp 6 New!.exe Windown Longhorn Beta Leak.exe Windows Sourcecode update.doc.exe XXX hardcore images.exe
Infection of files
The worm searches all accessible disks for files with an .exe extension and infects them by writing its polymorphic code to the end of the file.
Remote administration
The worm opens and tracks activity on port 2556. The backdoor functions makes it possible to remotely execute commands and download files on the victim machine.Other
The worm attempts to terminate antivirus software and firewalls by terminating the following processes in memory:AGENTSVR.EXE ANTI-TROJAN.EXE ANTIVIRUS.EXE ANTS.EXE APIMONITOR.EXE APLICA32.EXE APVXDWIN.EXE ATCON.EXE ATGUARD.EXE ATRO55EN.EXE ATUPDATER.EXE ATWATCH.EXE AUPDATE.EXE AUTODOWN.EXE AUTOTRACE.EXE AUTOUPDATE.EXE AVCONSOL.EXE AVGSERV9.EXE AVLTMAIN.EXE AVPUPD.EXE AVSYNMGR.EXE AVWUPD32.EXE AVXQUAR.EXE AVprotect9x.exe Au.exe BD_PROFESSIONAL.EXE BIDEF.EXE BIDSERVER.EXE BIPCP.EXE BIPCPEVALSETUP.EXE BISP.EXE BLACKD.EXE BLACKICE.EXE BOOTWARN.EXE BORG2.EXE BS120.EXE CDP.EXE CFGWIZ.EXE CFIADMIN.EXE CFIAUDIT.EXE CFINET.EXE CFINET32.EXE CLEAN.EXE CLEANER.EXE CLEANER3.EXE CLEANPC.EXE CMGRDIAN.EXE CMON016.EXE CPD.EXE CPF9X206.EXE CPFNT206.EXE CV.EXE CWNB181.EXE CWNTDWMO.EXE D3dupdate.exe DEFWATCH.EXE DEPUTY.EXE DPF.EXE DPFSETUP.EXE DRWATSON.EXE DRWEBUPW.EXE ENT.EXE ESCANH95.EXE ESCANHNT.EXE ESCANV95.EXE EXANTIVIRUS-CNET.EXE FAST.EXE FIREWALL.EXE FLOWPROTECTOR.EXE FP-WIN_TRIAL.EXE FRW.EXE FSAV.EXE FSAV530STBYB.EXE FSAV530WTBYB.EXE FSAV95.EXE GBMENU.EXE GBPOLL.EXE GUARD.EXE HACKTRACERSETUP.EXE HTLOG.EXE HWPE.EXE IAMAPP.EXE IAMSERV.EXE ICLOAD95.EXE ICLOADNT.EXE ICMON.EXE ICSSUPPNT.EXE ICSUPP95.EXE ICSUPPNT.EXE IFW2000.EXE IPARMOR.EXE IRIS.EXE JAMMER.EXE KAVLITE40ENG.EXE KAVPERS40ENG.EXE KERIO-PF-213-EN-WIN.EXE KERIO-WRL-421-EN-WIN.EXE KERIO-WRP-421-EN-WIN.EXE KILLPROCESSSETUP161.EXE LDPRO.EXE LOCALNET.EXE LOCKDOWN.EXE LOCKDOWN2000.EXE LSETUP.EXE LUALL.EXE LUCOMSERVER.EXE LUINIT.EXE MCAGENT.EXE MCUPDATE.EXE MFW2EN.EXE MFWENG3.02D30.EXE MGUI.EXE MINILOG.EXE MOOLIVE.EXE MRFLUX.EXE MSCONFIG.EXE MSINFO32.EXE MSSMMC32.EXE MU0311AD.EXE NAV80TRY.EXE NAVAPW32.EXE NAVDX.EXE NAVSTUB.EXE NAVW32.EXE NC2000.EXE NCINST4.EXE NDD32.EXE NEOMONITOR.EXE NETARMOR.EXE NETINFO.EXE NETMON.EXE NETSCANPRO.EXE NETSPYHUNTER-1.2.EXE NETSTAT.EXE NISSERV.EXE NISUM.EXE NMAIN.EXE NORTON_INTERNET_SECU_3.0_407.EXE NPF40_TW_98_NT_ME_2K.EXE NPFMESSENGER.EXE NPROTECT.EXE NSCHED32.EXE NTVDM.EXE NUPGRADE.EXE NVARCH16.EXE NWINST4.EXE NWTOOL16.EXE OSTRONET.EXE OUTPOST.EXE OUTPOSTINSTALL.EXE OUTPOSTPROINSTALL.EXE PADMIN.EXE PANIXK.EXE PAVPROXY.EXE PCC2002S902.EXE PCC2K_76_1436.EXE PCCIOMON.EXE PCDSETUP.EXE PCFWALLICON.EXE PCIP10117_0.EXE PDSETUP.EXE PERISCOPE.EXE PERSFW.EXE PF2.EXE PFWADMIN.EXE PINGSCAN.EXE PLATIN.EXE POPROXY.EXE POPSCAN.EXE PORTDETECTIVE.EXE PPINUPDT.EXE PPTBC.EXE PPVSTOP.EXE PROCEXPLORERV1.0.EXE PROPORT.EXE PROTECTX.EXE PSPF.EXE PURGE.EXE PVIEW95.EXE QCONSOLE.EXE QSERVER.EXE RAV8WIN32ENG.EXE REGEDIT.EXE REGEDT32.EXE RESCUE.EXE RESCUE32.EXE RRGUARD.EXE RSHELL.EXE RTVSCN95.EXE RULAUNCH.EXE SAFEWEB.EXE SBSERV.EXE SD.EXE SETUPVAMEEVAL.EXE SETUP_FLOWPROTECTOR_US.EXE SFC.EXE SGSSFW32.EXE SH.EXE SHELLSPYINSTALL.EXE SHN.EXE SMC.EXE SOFI.EXE SPF.EXE SPHINX.EXE SPYXX.EXE SS3EDIT.EXE ST2.EXE SUPFTRL.EXE SUPPORTER5.EXE SYMPROXYSVC.EXE SYSEDIT.EXE TASKMON.EXE TAUMON.EXE TAUSCAN.EXE TC.EXE TCA.EXE TCM.EXE TDS-3.EXE TDS2-98.EXE TDS2-NT.EXE TFAK5.EXE TGBOB.EXE TITANIN.EXE TITANINXP.EXE TRACERT.EXE TRJSCAN.EXE TRJSETUP.EXE TROJANTRAP3.EXE UNDOBOOT.EXE UPDATE.EXE VBCMSERV.EXE VBCONS.EXE VBUST.EXE VBWIN9X.EXE VBWINNTW.EXE VCSETUP.EXE VFSETUP.EXE VIRUSMDPERSONALFIREWALL.EXE VNLAN300.EXE VNPC3000.EXE VPC42.EXE VPFW30S.EXE VPTRAY.EXE VSCENU6.02D30.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 WEBSCANX.EXE WGFE95.EXE WHOSWATCHINGME.EXE WINRECON.EXE WNT.EXE WRADMIN.EXE WRCTRL.EXE WSBGATE.EXE WYVERNWORKSFIREWALL.EXE XPF202EN.EXE ZAPRO.EXE ZAPSETUP3001.EXE ZATUTOR.EXE ZAUINST.EXE ZONALM2601.EXE ZONEALARM.EXE
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