Virus: Worm/Mytob.HT Date discovered: 27/06/2005 Type: Worm In the wild: Yes Reported Infections: Medium Distribution Potential: Medium Damage Potential: Medium Static file: Yes File size: 66.937 Bytes MD5 checksum: e1fb8181d12248f0b633fcdda38141f9 IVDF version: 6.31.00.110 - Monday, June 27, 2005
General Method of propagation: • Email Aliases: • Mcafee: W32/Mytob.gen • Sophos: W32/Mytob-KD • Panda: W32/Mytob.QT.worm • Eset: Win32/Mytob.VT • Bitdefender: Win32.Netsky.DAN@mm Platforms / OS: • Windows 2000 • Windows XP • Windows 2003 Side effects: • Blocks access to certain websites • Blocks access to security websites • Drops malicious files • Uses its own Email engine • Lowers security settings • Registry modification • Third party control Files It copies itself to the following location: • %SYSDIR% \ctech.exe It overwrites a file. – %SYSDIR% \drivers\etc\hosts Registry The following registry key is added in order to run the process after reboot: – [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices] • "WINDOWS SYSTEM"="ctech.exe" One of the following values is added in order to run the process after reboot: – [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] • "WINDOWS SYSTEM"="ctech.exe" The following registry key is changed: Deactivate Windows XP Firewall: – [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess] New value: • "Start"=dword:0x00000004 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. – Email addresses gathered from WAB (Windows Address Book) – Generated addresses Subject: One of the following: • *DETECTED* Online User Violation • Important Notification • Notice of account limitation • Warning Message: Your services near to be closed. • You have successfully updated your password • YOUR ACCOUNT IS SUSPENDED FOR SECURITY REASONS • Your password has been successfully updated • Your password has been updated Body: – Contains HTML code. The body of the email is one of the following: • Dear user %s, You have successfully updated the password of your %s account. If you did not authorize this change or if you need assistance with your account, please contact %s customer service at: %s Thank you for using %s! The %s Support Team +++ Attachment: No Virus (Clean) +++ %s Antivirus - www.%s • Dear user %s, It has come to our attention that your %s User Profile ( x ) records are out of date. For further details see the attached document. Thank you for using %s! The %s Support Team +++ Attachment: No Virus (Clean) +++ %s Antivirus - www.%s • Dear %s Member, We have temporarily suspended your email account %s. 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 %s account. Sincerely,The %s Support Team +++ Attachment: No Virus (Clean) +++ %s Antivirus - www.%s • Dear %s 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 %s Support Team +++ Attachment: No Virus found +++ %s Antivirus - www.%s Attachment: The filename of the attachment is constructed out of the following: – It starts with one of the following: • important-details • accepted-password • account-details • account-info • account-password • account-report • document • email-details • email-password • updated-password • new-password • approved-password • password • readme The file extension is one of the following: • zip • pif • scr • exe • cmd • bat The attachment is a copy of the malware itself. Mailing Search addresses: It searches the following files for email addresses: • txt; htm; sht; jsp; cgi; xml; php; dbx; tbb; adb; 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. 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: server.ic**********.com Port: 5190 Channel: #*legit Nickname: [XDCC]-%random character string% Password: legitshit – This malware has the ability to collect and send information such as: • Free disk space • Free memory • Malware uptime • Size of memory • Information about the Windows operating system – Furthermore it has the ability to perform actions such as: • Download file • Join IRC channel • Leave IRC channel • Updates itself • Visit a website Hosts The host file is modified as explained: – In this case already existing entries remain unmodified. – Access to the following domains is effectively blocked: • 127.0.0.1 www.symantec.com; 127.0.0.1 securityresponse.symantec.com; 127.0.0.1 symantec.com; 127.0.0.1 www.sophos.com; 127.0.0.1 sophos.com; 127.0.0.1 www.mcafee.com; 127.0.0.1 mcafee.com; 127.0.0.1 liveupdate.symantecliveupdate.com; 127.0.0.1 www.viruslist.com; 127.0.0.1 viruslist.com; 127.0.0.1 viruslist.com; 127.0.0.1 f-secure.com; 127.0.0.1 www.f-secure.com; 127.0.0.1 kaspersky.com; 127.0.0.1 kaspersky-labs.com; 127.0.0.1 www.avp.com; 127.0.0.1 www.kaspersky.com; 127.0.0.1 avp.com; 127.0.0.1 www.networkassociates.com; 127.0.0.1 networkassociates.com; 127.0.0.1 www.ca.com; 127.0.0.1 ca.com; 127.0.0.1 mast.mcafee.com; 127.0.0.1 my-etrust.com; 127.0.0.1 www.my-etrust.com; 127.0.0.1 download.mcafee.com; 127.0.0.1 dispatch.mcafee.com; 127.0.0.1 secure.nai.com; 127.0.0.1 nai.com; 127.0.0.1 www.nai.com; 127.0.0.1 update.symantec.com; 127.0.0.1 updates.symantec.com; 127.0.0.1 us.mcafee.com; 127.0.0.1 liveupdate.symantec.com; 127.0.0.1 customer.symantec.com; 127.0.0.1 rads.mcafee.com; 127.0.0.1 trendmicro.com; 127.0.0.1 pandasoftware.com; 127.0.0.1 www.pandasoftware.com; 127.0.0.1 www.trendmicro.com; 127.0.0.1 www.grisoft.com; 127.0.0.1 www.microsoft.com; 127.0.0.1 microsoft.com; 127.0.0.1 www.virustotal.com; 127.0.0.1 virustotal.com; 127.0.0.1 www.amazon.com; 127.0.0.1 www.amazon.co.uk; 127.0.0.1 www.amazon.ca; 127.0.0.1 www.amazon.fr; 127.0.0.1 www.paypal.com; 127.0.0.1 paypal.com; 127.0.0.1 moneybookers.com; 127.0.0.1 www.moneybookers.com; 127.0.0.1 www.ebay.com; 127.0.0.1 ebay.com Process termination The active processes memory is searched for the following strings. If successful the processes become 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; RScash.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 Anti debugging It checks if one of the following files are present: • \\.\SICE • \\.\SIWVID • \\.\NTICE • \\.\REGSYS • \\.\REGVXG • \\.\FILEVXG • \\.\FILEM • \\.\TRW • \\.\ICEEXT If successful, it terminates immediately. File details Runtime packer: In order to aggravate detection and reduce size of the file it is packed with a runtime packer.
Description inserted by Petre Galan on Thursday, December 3, 2009 Description updated by Petre Galan on Thursday, December 3, 2009
Back
.
.
.
.