W32.Gaobot.UJ

When W32.Gaobot.UJ is executed, it performs the following actions:

1. Copies and executes itself as %System%\regsvc32.exe.
   
   

   ---

   Note: %System% is a variable. The worm locates the System folder and copies itself to that location. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
   

   ---

   
   
2. Adds the value:
   
   "Generic Service Process"="regsvc32.exe"
   
   to the registry keys:
   
   • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
     RunServices
     
     so that the worm runs when you start Windows.
     
     
3. Tries to infect every running process on the computer. If it succeeds, the %System%\regsrv32.exe file will be hidden from the inspection of any processes and all newly created processes will be infected in memory. This could prevent the user from finding the worm file and deleting it.
   
   

   ---

   Note: The worm only infects the process in memory. Some processes will become unstable or crash.

   ---

   
   
4. Ends processes associated with antivirus and firewall software. Refer to "Processes" at the end of this section for a complete list of processes.
   
   
5. Attempts to end the following processes, which are associated with other worms:
   
   • taskmon.exe
   • bbeagle.exe
   • d3dupdate.exe
   • winsys.exe
   • ssate.exe
   • i11r54n4.exe
   • rate.exe
   • irun4.exe
   • Ssate.exe
     
     
6. Appends the following lines to the infected computer's hosts file:
   
   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 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 www.trendmicro.com
   127.0.0.1 www.grisoft.com
   
   so that attempts to contact any of these URLs gets redirected to the local computer.
   
   
7. Connects to a predetermined IRC channel, using its own IRC client, and listens for commands. Some examples of commands are:
   
   • Taking a screenshot of the system
   • Changing the IRC server to which the worm connects
   • Forcing a connection to a specified IRC channel
   • Terminating the worm
   • Having the worm send messages to people or channels on IRC
   • Instructing the worm to send the files from the system to the specified user over IRC (DCC Send)
   • Downloading and executing files
   • Stealing system information
   • Harvesting email addresses
   • Stealing CD keys for various games
   • Connecting to FTP servers to upload files
   • Terminating processes (other than those mentioned in step 4)
   • Connecting to other systems using SSH
   • Running the worm as a SOCKS proxy server, making connections, which attackers make, appear to come from the infected system.
     
     
8. Attempts to spread to other computers by exploiting the following vulnerabilities:
   
   • The DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) using TCP port 135.
   • The RPC locator vulnerability (described in Microsoft Security Bulletin MS03-001) using TCP port 445.
   • The WebDav vulnerability (described in Microsoft Security Bulletin MS03-007) using TCP port 80.
   • The Workstation service buffer overrun vulnerability (described in Microsoft Security Bulletin MS03-049) using TCP port 445.
     
     
9. Probes the following shares:
   
   • admin$

• c$
• d$
• e$
• print$
  
  using the varies user names and week passwords, as well as any user names found using NetUserEnum():
  
  

1. Copies itself to any computers it compromised using the above exploits.

Processes
W32.Gaobot.UJ attempts to terminate the following processes, mentioned in step 4:

• 53ARCH.EXE
• ACKWIN32.EXE
• ADAWARE.EXE
• ADVXDWIN.EXE
• AGENTSVR.EXE
• AGENTW.EXE
• ALERTSVC.EXE
• ALEVIR.EXE
• ALOGSERV.EXE
• AMON.EXE
• AMON9X.EXE
• ANTI-TROJAN.EXE
• ANTIVIRUS.EXE
• ANTS.EXE
• APIMONITOR.EXE
• APLICA32.EXE
• APORTS.EXE
• APVXDWIN.EXE
• ARMKILLER
• ARR.EXE
• ATCON.EXE
• ATGUARD.EXE
• ATRO55EN.EXE
• ATUPDATER.EXE
• ATWATCH.EXE
• AU.EXE
• AUPDATE.EXE
• AUTO-PROTECT.NAV80TRY.EXE
• AUTODOWN.EXE
• AUTOTRACE.EXE
• AUTOUPDATE.EXE
• AV.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
• BACKWEB.EXE
• BARGAINS.EXE
• BCW.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
• CLAW95CF.EXE
• CLEAN.EXE
• CLEANER.EXE
• CLEANER3.EXE
• CLEANPC.EXE
• CLICK.EXE
• CLIENT.EXE
• CMD32.EXE
• CMESYS.EXE
• CMGRDIAN.EXE
• CMON016.EXE
• CONDOM.EXE
• CONNECTIONMONITOR.EXE
• CPD.EXE
• CPF9X206.EXE
• CPFNT206.EXE
• CRACKER.EXE
• CTRL.EXE
• CV.EXE
• CWNB181.EXE
• CWNTDWMO.EXE
• Claw95.EXE
• DATEMANAGER.EXE
• DCOMX.EXE
• DEBUG.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
• DUMP.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
• F-PROT.EXE
• F-PROT95.EXE
• F-STOPW.EXE
• FAMEH32.EXE
• FAST.EXE
• FCH32.EXE
• FIH32.EXE
• FINDVIRU.EXE
• FIREWALL.EXE
• FLOWPROTECTOR.EXE
• FNRB32.EXE
• FP-WIN.EXE
• FP-WIN_TRIAL.EXE
• FPORT.EXE
• FPROT.EXE
• FRHED.EXE
• FRW.EXE
• FSAA.EXE
• FSAV.EXE
• FSAV32.EXE
• FSAV530STBYB.EXE
• FSAV530WTBYB.EXE
• FSAV95.EXE
• FSGK32.EXE
• FSM32.EXE
• FSMA32.EXE
• FSMB32.EXE
• FW.EXE
• GATOR.EXE
• GBMENU.EXE
• GBPOLL.EXE
• GENERICS.EXE
• GMT.EXE
• GUARD.EXE
• GUARDDOG.EXE
• HACKTRACERSETUP.EXE
• HBINST.EXE
• HBSRV.EXE
• HIJACKTHIS.EXE
• HONEYD.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
• ICLOAD95.EXE
• ICLOADNT.EXE
• ICMON.EXE
• ICSUPP95.EXE
• ICSUPPNT.EXE
• IDLE.EXE
• IEDLL.EXE
• IEDRIVER.EXE
• IEXPLORER.EXE
• IFACE.EXE
• IFW2000.EXE
• IISLOCKD.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
• JDBGMRG.EXE
• JEDI.EXE
• KAVLITE40ENG.EXE
• KAVPERS40ENG.EXE
• KAVPF.EXE
• KAZZA.EXE
• KD.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
• LOGGER.EXE
• LOGVIEWER.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
• 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
• NETSTAT.EXE
• NETUTILS.EXE
• NETWORKACTIVSNIFFERV1.4.EXE
• NISSERV.EXE
• NISUM.EXE
• NMAIN.EXE
• NOD32.EXE
• NOD32CC.EXE
• NOD32M2.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
• NVARCH16.EXE
• NVC95.EXE
• NVSVC32.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
• PEDASM.EXE
• PENIS.EXE
• PERISCOPE.EXE
• PERSFW.EXE
• PERSWF.EXE
• PF2.EXE
• PFWADMIN.EXE
• PGMONITR.EXE
• PINGSCAN.EXE
• PLATIN.EXE
• PMDUMP.EXE
• PMON
• 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
• RAV7.EXE
• RAV7WIN.EXE
• RAV8WIN32ENG.EXE
• RAY.EXE
• RB32.EXE
• RCSYNC.EXE
• REALMON.EXE
• REGCLEANER.EXE
• REGED.EXE
• REGEDIT.EXE
• REGEDT32.EXE
• RERGCLEANR.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
• SCRSVR.EXE
• SCVHOST.EXE
• SD.EXE
• SERV95.EXE
• SERVICE.EXE
• SERVLCE.EXE
• SERVLCES.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
• SRIN.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
• SeDebugPrivilege
• TASKMG.EXE
• TASKMO.EXE
• TASKMON.EXE
• TAUMON.EXE
• TBSCAN.EXE
• TC.EXE
• TCA.EXE
• TCM.EXE
• TCPVIEW.EXE
• TDS-3.EXE
• TDS2-98.EXE
• TDS2-NT.EXE
• TEEKIDS.EXE
• TEST.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
• 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
• WIN-BUGSFIX.EXE
• WIN32.EXE
• WIN32US.EXE
• WINACTIVE.EXE
• WINDBG.EXE
• WINDOW.EXE
• WINDOWS.EXE
• WINDUMP.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

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

• Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
• Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
• Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
• Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
• Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
• Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
• If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
• Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
• Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
• Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
• Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
• If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
• For further information on the terms used in this document, please refer to the Security Response glossary.

Summary