Virus: Worm/Mytob.NM Date discovered: 18/04/2006 Type: Worm In the wild: Yes Reported Infections: Low Distribution Potential: Medium Damage Potential: Medium Static file: Yes File size: 123.392 Bytes MD5 checksum: 4839f635d2a841377439999be3055512 VDF version: 6.34.00.194
General Method of propagation: • Email Aliases: • Symantec: W32.Mytob.PI@mm • Kaspersky: Net-Worm.Win32.Mytob.eg • TrendMicro: WORM_MYTOB.PW • Sophos: W32/Mytob-HI • Panda: W32/Mytob.NU.worm • VirusBuster: I-Worm.Mytob.RC • Bitdefender: Win32.Worm.Freedar.A It was previously detected as: • Worm/Freedar.A Platforms / OS: • Windows 98 • Windows 98 SE • Windows NT • Windows ME • Windows 2000 • Windows XP • Windows 2003 Side effects: • Blocks access to certain websites • Blocks access to security websites • Uses its own Email engine • Lowers security settings • Registry modification • Third party control Files It copies itself to the following location: • %SYSDIR% \scalpe91.exe Registry The following registry keys are added in order to run the processes after reboot: – [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] • "WINDOWS SYSTEM SCALPE"="scalpe91.exe" – [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices] • "WINDOWS SYSTEM SCALPE"="scalpe91.exe" The following registry key is changed: Deactivate Windows Firewall: – [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess] Old value: • "Start"=%user defined settings% New value: • "Start"=dword:00000004 Email It contains an integrated SMTP engine in order to send emails. A direct connection with the destination server will be established. The characteristics are described in the following: From: The sender address is spoofed. Generated addresses. Please do not assume that it was the sender's intention to send this email to you. He might not know about his infection or might not even be infected at all. Furthermore it is possible that you will receive bounced emails telling you that you are infected. This might also not be the case. To: – Email addresses found in specific files on the system. – Generated addresses Subject: One of the following: • Your Account is Suspended • *DETECTED* Online User Violation • Your Account is Suspended For Security Reasons • Warning Message: Your services near to be closed. • Important Notification • Members Support • Security measures • Email Account Suspension • Notice of account limitation • Your password has been updated • Your password has been successfully updated • You have successfully updated your password • Your new account password is approved In some cases the subject might also be empty. Furthermore the subject line could contain random letters. Body: – Contains HTML code. – In some cases it may be empty. – In some cases it may contain random characters. The body of the email is one of the following: • Dear user %username from receiver's email address% , You have successfully updated the password of your %receiver's domain name from email address% account. If you did not authorize this change or if you need assistance with your account, please contact %receiver's domain name from email address% customer service at: %sender's email address% Thank you for using %receiver's domain name from email address% ! The %receiver's domain name from email address% Support Team +++ Attachment: No Virus (Clean) +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address% • Dear user %username from receiver's email address% , It has come to our attention that your %receiver's domain name from email address% User Profile ( x ) records are out of date. For further details see the attached document. Thank you for using %receiver's domain name from email address% ! The %receiver's domain name from email address% Support Team +++ Attachment: No Virus (Clean) +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address% • Dear %receiver's domain name from email address% Member, We have temporarily suspended your email account %receiver's email address% . 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 %receiver's domain name from email address% account. Sincerely,The %receiver's domain name from email address% Support Team +++ Attachment: No Virus (Clean) +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address% • Dear %receiver's domain name from email address% 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 %receiver's domain name from email address% Support Team +++ Attachment: No Virus found +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address% Attachment: The filenames of the attachments is constructed out of the following: – It starts with one of the following: • important-details • account-details • email-details • account-info • document • readme • account-report • updated-password • email-password • new-password • password • approved-password • account-password • accepted-password Continued by one of the following: • zip The attachment is an archive containing a copy of the malware itself. Mailing Search addresses: It searches the following files for email addresses: • txt; htmb; shtl; jspl; cgil; xmls; phpq; aspd; dbxn; tbbg; adbh; html; wab Address generation for TO field: To generate addresses it uses the following strings: • john; josh; alex; michael; james; mike; kevin; david; george; sam; andrew; jose; leo; maria; jim; brian; serg; mary; ray; tom; peter; robert; bob; jane; joe; dan; dave; matt; steve; smith; stan; bill; bob; jack; fred; ted; paul; brent; sales; anna; brenda; claudia; debby; helen; jerry; jimmy; julie; linda; michael; frank; adam; sandra It combines the result with domains that were found in files, which were previously searched for addresses. Address generation for FROM field: To generate addresses it uses the following strings: • support • administrator • mail • service • admin • info • register • webmaster It combines the result with domains that were found in files, which were previously searched for addresses. Avoid addresses: It does not send emails to addresses containing one of the following strings: • .edu; avp; syma; icrosof; msn.; hotmail; panda; sopho; borlan; inpris; example; mydomai; nodomai; ruslis; .gov; gov.; .mil; foo.; berkeley; unix; math; bsd; mit.e; gnu; fsf.; ibm.com; google; kernel; linux; fido; usenet; iana; ietf; rfc-ed; sendmail; arin.; ripe.; isi.e; isc.o; secur; acketst; pgp; tanford.e; utgers.ed; mozilla; be_loyal:; root; info; samples; postmaster; webmaster; noone; nobody; nothing; anyone; someone; your; you; bugs; rating; site; contact; soft; somebody; privacy; service; help; not; submit; feste; gold-certs; the.bat; page; admin; icrosoft; support; ntivi; unix; bsd; linux; listserv; certific; google; accoun; spm; fcnz; www; secur; abuse Prepend MX strings: In order to get the IP address of the mail server it has the ability to prepend the following strings to the domain name: • mx. • mail. • smtp. • mx1. • mxs. • mail1. • relay. • ns. • gate. IRC To deliver system information and to provide remote control it connects to the following IRC Server: Server: tob.majestic********** Port: 5190 Channel: #tob Nickname: x1%six-digit random character string% Password: knight – This malware has the ability to collect and send information such as: • Free memory • Information about the Windows operating system – Furthermore it has the ability to perform actions such as: • connect to IRC server • disconnect from IRC server • Download file • Execute file • Send emails • Terminate malware • Updates itself Hosts The host file is modified as explained: – In this case already existing entries remain unmodified. – Access to the following domains is effectively blocked: • www.symantec.com; securityresponse.symantec.com; symantec.com; www.sophos.com; sophos.com; www.mcafee.com; ; mcafee.com; liveupdate.symantecliveupdate.com; www.viruslist.com; viruslist.com; viruslist.com; f-secure.com; www.f-secure.com; kaspersky.com; kaspersky-labs.com; www.avp.com; www.kaspersky.com; avp.com; www.networkassociates.com; networkassociates.com; www.ca.com; ca.com; mast.mcafee.com; my-etrust.com; www.my-etrust.com; download.mcafee.com; dispatch.mcafee.com; secure.nai.com; nai.com; www.nai.com; update.symantec.com; updates.symantec.com; us.mcafee.com; liveupdate.symantec.com; customer.symantec.com; rads.mcafee.com; trendmicro.com; pandasoftware.com; www.pandasoftware.com; www.trendmicro.com; www.grisoft.com; www.microsoft.com; microsoft.com; www.virustotal.com; virustotal.com; www.amazon.com; www.amazon.co.uk; www.amazon.ca; www.amazon.fr; www.paypal.com; paypal.com; moneybookers.com; www.moneybookers.com; www.ebay.com; ebay.com The modified host file will look like this: Process termination List of processes that are terminated: • 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; ATUPDATER.EXE; ATWATCH.EXE; AU.EXE; AUPDATE.EXE; AUPDATE.EXE; AUTODOWN.EXE; AUTODOWN.EXE; AUTOTRACE.EXE; AUTOTRACE.EXE; AUTOUPDATE.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; AVPUPD.EXE; AVSCHED32.EXE; AVSYNMGR.EXE; AVWINNT.EXE; AVWUPD.EXE; AVWUPD32.EXE; AVWUPD32.EXE; AVWUPSRV.EXE; AVXMONITOR9X.EXE; AVXMONITORNT.EXE; AVXQUAR.EXE; AVXQUAR.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; CFIAUDIT.EXE; CFINET.EXE; CFINET32.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; CLAW95CF.EXE; DATEMANAGER.EXE; DCOMX.EXE; DEFALERT.EXE; DEFSCANGUI.EXE; DEFWATCH.EXE; DEPUTY.EXE; DIVX.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; ESCANHNT.EXE; ESCANV95.EXE; ESPWATCH.EXE; ETHEREAL.EXE; ETRUSTCIPE.EXE; EVPN.EXE; EXANTIVIRUS-CNET.EXE; EXE.AVXW.EXE; EXPERT.EXE; EXPLORE.EXE; F-PROT.EXE; F-PROT95.EXE; F-STOPW.EXE; FAMEH32.EXE; FAST.EXE; FCH32.EXE; FIH32.EXE; FINDVIRU.EXE; FIREWALL.EXE; FNRB32.EXE; FP-WIN.EXE; FP-WIN_TRIAL.EXE; FPROT.EXE; FRW.EXE; FSAA.EXE; FSAV.EXE; FSAV32.EXE; FSAV530STBYB.EXE; FSAV530WTBYB.EXE; FSAV95.EXE; FSGK32.EXE; FSM32.EXE; FSMA32.EXE; FSMB32.EXE; GATOR.EXE; GBMENU.EXE; GBPOLL.EXE; GENERICS.EXE; GMT.EXE; GUARD.EXE; GUARDDOG.EXE; HACKTRACERSETUP.EXE; HBINST.EXE; HBSRV.EXE; HOTACTIO.EXE; HOTPATCH.EXE; HTLOG.EXE; HTPATCH.EXE; HWPE.EXE; HXDL.EXE; HXIUL.EXE; IAMAPP.EXE; IAMSERV.EXE; IAMSTATS.EXE; IBMASN.EXE; IBMAVSP.EXE; ICLOADNT.EXE; ICMON.EXE; ICSUPP95.EXE; ICSUPPNT.EXE; IDLE.EXE; IEDLL.EXE; IEDRIVER.EXE; IEXPLORER.EXE; IFACE.EXE; IFW2000.EXE; INETLNFO.EXE; INFUS.EXE; INFWIN.EXE; INIT.EXE; INTDEL.EXE; INTREN.EXE; IOMON98.EXE; ISTSVC.EXE; JAMMER.EXE; JDBGMRG.EXE; JEDI.EXE; KAVLITE40ENG.EXE; KAVPERS40ENG.EXE; KAVPF.EXE; KAZZA.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; LUALL.EXE; LUAU.EXE; LUCOMSERVER.EXE; LUINIT.EXE; LUSPT.EXE; MAPISVC32.EXE; MCAGENT.EXE; MCMNHDLR.EXE; MCSHIELD.EXE; MCTOOL.EXE; MCUPDATE.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; MSSYS.EXE; MSVXD.EXE; MU0311AD.EXE; MWATCH.EXE; N32SCANW.EXE; NAV.EXE; AUTO-PROTECT.NAV80TRY.EXE; NAVAP.NAVAPSVC.EXE; NAVAPSVC.EXE; NAVAPW32.EXE; NAVDX.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; NETSTAT.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; NTVDM.EXE; NTXconfig.EXE; NUI.EXE; NUPGRADE.EXE; NUPGRADE.EXE; NVARCH16.EXE; NVC95.EXE; NVSVC32.EXE; NWINST4.EXE; NWSERVICE.EXE; NWTOOL16.EXE; OLLYDBG.EXE; ONSRVR.EXE; OPTIMIZE.EXE; OSTRONET.EXE; OTFIX.EXE; OUTPOST.EXE; OUTPOST.EXE; OUTPOSTINSTALL.EXE; OUTPOSTPROINSTALL.EXE; PADMIN.EXE; PANIXK.EXE; PATCH.EXE; PAVCL.EXE; PAVPROXY.EXE; PAVSCHED.EXE; PAVW.EXE; PCFWALLICON.EXE; PCIP10117_0.EXE; PCSCAN.EXE; PDSETUP.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; QCONSOLE.EXE; QSERVER.EXE; RAPAPP.EXE; RAV7.EXE; RAV7WIN.EXE; RAV8WIN32ENG.EXE; RAY.EXE; RB32.EXE; RCSYNC.EXE; REALMON.EXE; REGED.EXE; REGEDIT.EXE; REGEDT32.EXE; RESCUE.EXE; RESCUE32.EXE; RRGUARD.EXE; RSHELL.EXE; RTVSCAN.EXE; RTVSCN95.EXE; RULAUNCH.EXE; RUN32DLL.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; SETUPVAMEEVAL.EXE; SETUP_FLOWPROTECTOR_US.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; SPOLER.EXE; SPOOLCV.EXE; SPOOLSV32.EXE; SPYXX.EXE; SREXE.EXE; SRNG.EXE; SS3EDIT.EXE; SSGRATE.EXE; SSG_4104.EXE; ST2.EXE; START.EXE; STCLOADER.EXE; SUPFTRL.EXE; SUPPORT.EXE; SUPPORTER5.EXE; SVC.EXE; SVCHOSTC.EXE; SVCHOSTS.EXE; SVSHOST.EXE; SWEEP95.EXE; SWEEPNET.SWEEPSRV.SYS.SWNETSUP.EXE; SYMPROXYSVC.EXE; SYMTRAY.EXE; SYSEDIT.EXE; SYSTEM.EXE; SYSTEM32.EXE; SYSUPD.EXE; TASKMG.EXE; TASKMO.EXE; TASKMON.EXE; TAUMON.EXE; TBSCAN.EXE; TC.EXE; TCA.EXE; TCM.EXE; TDS-3.EXE; TDS2-NT.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; 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; 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; WHOSWATCHINGME.EXE; WIMMUN32.EXE; WIN-BUGSFIX.EXE; WIN32.EXE; WIN32US.EXE; WINACTIVE.EXE; WINDOW.EXE; WINDOWS.EXE; WININETD.EXE; WININIT.EXE; WININITX.EXE; WINLOGIN.EXE; WINMAIN.EXE; WINNET.EXE; WINPPR32.EXE; WINRECON.EXE; WINSERVN.EXE; WINSSK32.EXE; WINSTART.EXE; WINSTART001.EXE; WINTSK32.EXE; WINUPDATE.EXE; WKUFIND.EXE; WNAD.EXE; WNT.EXE; WRADMIN.EXE; WRCTRL.EXE; WSBGATE.EXE; WUPDATER.EXE; WUPDT.EXE; WYVERNWORKSFIREWALL.EXE; XPF202EN.EXE; ZAPRO.EXE; ZAPSETUP3001.EXE; ZATUTOR.EXE; ZONALM2601.EXE; ZONEALARM.EXE; _AVP32.EXE; _AVPCC.EXE; _AVPM.EXE; CMD.EXE; TASKMGR.EXE; NEC.EXE Miscellaneous Mutex: It creates the following Mutex: • H-E-L-L-B-O-T-P-O-L-Y-M-O-R-P-H File details Runtime packer: In order to aggravate detection and reduce size of the file it is packed with the following runtime packer: • Enigma protector
Description inserted by Andrei Ivanes on Tuesday, April 18, 2006 Description updated by Andrei Ivanes on Thursday, April 20, 2006
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