Discovered: November 4, 2005
Updated: February 13, 2007 12:46:15 PM
Also Known As: WORM_BAGLE.BQ [Trend Micro]
Type: Trojan Horse
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
When Trojan.Lodav.B is executed, it performs the following actions:
- Copies itself as the following files:
- %System%\antiav_dll.dll
- %System%\antiav_exe.exe
Note: %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
- Adds the value:
"auto__antiav__key " = "%System%\antiav_exe.exe"
to the following registry subkeys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
so that it runs every time Windows starts.
- Loads the file antiav_dll.dll into the explorer.exe process and intercepts certain system calls in order to prevent the loading of security tools.
- Deletes the following registry subkeys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\APVXDWIN
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\avg7_cc
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\avg7_emc
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ccApp
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KAV50
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\McAfee Guardian
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\McAfee.InstantUpdate.Monitor
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NAV CfgWiz
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SSC_UserPrompt
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SymantecNetDriver Monitor
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Zone Labs Client
HKEY_CURRENT_USER\Software\Agnitum
HKEY_CURRENT_USER\Software\KasperskyLab
HKEY_CURRENT_USER\Software\McAfee
HKEY_CURRENT_USER\Software\Panda Software
HKEY_CURRENT_USER\Software\Symantec
HKEY_CURRENT_USER\Software\Trend Micro
HKEY_CURRENT_USER\Software\Zone Labs
in order to lower security settings on the compromised computer.
- Ends the following processes, most of which are security-related:
- ASHAVAST.EXE
- ASHDISP.EXE
- ASHENHCD.EXE
- ASHPOPWZ.EXE
- ASHSHA64.DLL
- ASHSIMPL.EXE
- ASHSKPCK.EXE
- ASHWEBSV.EXE
- AUPDATE.EXE
- AVCONSOL.EXE
- AVGCC.EXE
- AVGCMSG.DLL
- AVGEMC.EXE
- AVGNT.EXE
- AVSCHED32.DLL
- AVSCHED32.EXE
- AVSYNMGR.EXE
- AVWUPD32.EXE
- BCGCB59.DLL
- BDMCON.EXE
- BDNEWS.EXE
- BDSUBMIT.EXE
- BDSWITCH.EXE
- CAFIX.EXE
- CCAPP.EXE
- CCEVTMGR.EXE
- CCL30.DLL
- CCSETMGR.EXE
- CCVRTRST.DLL
- CLAMTRAY.EXE
- CLAMWIN.EXE
- CMGRDIAN.EXE
- D2HTLS32.DLL
- DRWADINS.EXE
- DRWEB32W.EXE
- DRWEBSCD.EXE
- DRWEBUPW.EXE
- FFJMPWEB.DLL
- FRESHCLAM.EXE
- GUARDEVT.DLL
- GUARDGUI.EXE
- GUARDMSG.DLL
- GUARDNT.EXE
- IKSYST32.DLL
- INETUPD.EXE
- INOCIT.EXE
- INOOEM.DLL
- INOOPTION.DLL
- INOUPTNG.EXE
- ISAFE.EXE
- KAV.EXE
- KAVMM.EXE
- KAVPF.EXE
- LUALL.EXE
- LUINSDLL.DLL
- LUUPDATE.EXE
- MCSHIELD.EXE
- NAVAPSVC.EXE
- NOD32.EXE
- NOD32API.DLL
- NOD32KUI.EXE
- NPFMNTOR.EXE
- NPFMSG.EXE
- NVCCF0D.DLL
- NVCEVLOG.DLL
- NVCOD.EXE
- NVCTE.EXE
- NVCUT.EXE
- OCONNDLG.DLL
- OCOOKDLG.DLL
- OUTPOST.EXE
- PCCGUIDE.EXE
- PCCTLCOM.EXE
- PYTHON23.DLL
- QHPF.EXE
- REALMON.EXE
- REGEDIT.EXE
- REGEDT32.EXE
- RULAUNCH.EXE
- SCHFACE.DLL
- SNDSRVC.EXE
- SPBBCSVC.EXE
- SPIDERML.EXE
- SYMLCSVC.EXE
- T2W32.DLL
- TMNTSRV.EXE
- TMPFW.EXE
- TMPROXY.EXE
- UP2DATE.EXE
- UPGREPL.EXE
- VBA32IFS.EXE
- VBA32LDR.EXE
- VBA32PP3.EXE
- VBAIFPS.DLL
- VETREDIR.DLL
- VSHWIN32.EXE
- VSSTAT.EXE
- VSVAULT.DLL
- XT1922.DLL
- VBA32ECM.EXE
- ZATUTOR.EXE
- ZLAVSCAN.DLL
- ZLCLIENT.EXE
- ZONEALARM.EXE
- Attempts to end those processes which have one of the following keywords in their window titles:
- Ahnlab task Scheduler
- alerter
- AlertManger
- AntiVir Service
- aswUpdSv
- Ati HotKey Poller
- avast! Antivirus
- AVEService
- AVExch32Service
- avg7alrt
- avg7updsvc
- AvgCore
- AvgFsh
- AvgServ
- AVIRAMailService
- AVIRAService
- avpcc
- AVUPDService
- AVWUpSrv
- AvxIni
- awhost32
- backweb client - 4476822
- BackWeb Client - 7681197
- backweb client-4476822
- bdss
- BlackICE
- CAISafe
- ccEvtMgr
- ccPwdSvc
- ccSetMgr
- ccSetMgr.exe
- DefWatch
- dvpapi
- dvpinit
- F-Secure Gatekeeper Handler Starter
- fsbwsys
- fsdfwd
- FSMA
- Guard NT
- InoRpc
- InoRT
- InoTask
- KAVMonitorService
- kavsvc
- KLBLMain
- McAfee Firewall
- McAfeeFramework
- McShield
- McTaskManager
- mcupdmgr.exe
- MCVSRte
- MonSvcNT
- navapsvc
- Network Associates Log Service
- nipsvc
- NISSERV
- NISUM
- NOD32ControlCenter
- NOD32Service
- Norman NJeeves
- Norman Type-R
- Norman ZANDA
- Norton Antivirus Server
- NPFMntor
- NProtectService
- NSCTOP
- nvcoas
- NVCScheduler
- nwclntc
- nwclntd
- nwclnte
- nwclntf
- nwclntg
- nwclnth
- NWService
- Outbreak Manager
- Outpost Firewall
- OutpostFirewall
- PASSRV
- PAVFNSVR
- Pavkre
- PavProt
- PavPrSrv
- PAVSRV
- PCCPFW
- PersFW
- PREVSRV
- PSIMSVC
- ravmon8
- SAVFMSE
- SAVScan
- SBService
- schscnt
- SharedAccess
- SmcService
- SNDSrvc
- SPBBCSvc
- SpiderNT
- SweepNet
- SWEEPSRV.SYS
- Symantec AntiVirus Client
- Symantec Core LC
- Tmntsrv
- V3MonNT
- V3MonSvc
- Vba32ECM
- Vba32ifs
- Vba32Ldr
- Vba32PP3
- VexiraAntivirus
- VisNetic AntiVirus Plug-in
- vsmon
- vsserv
- wuauserv
- Checks the following domains, some of which are security-related, and may block further connections to them:
- 193.69.114.12
- 212.113.20.69
- 213.219.245.4
- 213.248.60.121
- 216.200.68.152
- 62.146.66.181
- 63.210.193.12
- 84.53.142.22
- 84.53.142.6
- ad.doubleclick.net
- ad.fastclick.net
- ads.fastclick.net
- antivir.de
- anti-virus.by
- ar.atwola.com
- atdmt.com
- avast.com
- avira.com
- avp.ch
- avp.ch
- avp.com
- avp.com
- avp.ru
- avp.ru
- awaps.net
- awaps.net
- banner.fastclick.net
- banners.fastclick.net
- bitdefender.com
- bitdefender.ru
- ca.com
- ca.com
- ca.com
- ca.com
- ca.com
- ca.com
- ca.com
- ca.com
- ca.com
- ca.com
- clamav.net
- clamwin.com
- click.atdmt.com
- clicks.atdmt.com
- customer.symantec.com
- database.clamav.net
- dispatch.mcafee.com
- download.ikarus.at
- download.mcafee.com
- download.microsoft.com
- download25.avast.com
- downloadhosting.core.ignum.cz
- downloads.avira.com
- downloads.microsoft.com
- downloads1.kaspersky-labs.com
- downloads2.kaspersky-labs.com
- downloads3.kaspersky-labs.com
- downloads4.kaspersky-labs.com
- downloads-eu1.kaspersky-labs.com
- downloads-us1.kaspersky-labs.com
- downloads-us2.kaspersky-labs.com
- downloads-us3.kaspersky-labs.com
- drweb.com
- drweb.com
- drweb.ru
- engine.awaps.net
- esetsoftware.com
- fastclick.net
- fastclick.net
- files.referats.net
- f-secure.com
- f-secure.com
- ftp.avp.ch
- ftp.downloads2.kaspersky-labs.com
- ftp.f-secure.com
- ftp.kasperskylab.ru
- ftp.sophos.com
- ftpav.ca.com
- ftpav.ca.com
- gin.ba.euroweb.sk
- go.microsoft.com
- grisoft.com
- hbedv.com
- ids.kaspersky-labs.com
- ikarus-software.at
- kaspersky.com
- kaspersky.com
- kaspersky.ru
- kaspersky-labs.com
- kaspersky-labs.com
- liveupdate.symantec.com
- liveupdate.symantecliveupdate.com
- mast.mcafee.com
- mcafee.com
- mcafee.com
- media.fastclick.net
- msdn.microsoft.com
- msk4.drweb.com
- my-etrust.com
- my-etrust.com
- nai.com
- nai.com
- networkassociates.com
- networkassociates.com
- niutwo.norman.no
- office.microsoft.com
- open.by
- pandasoftware.com
- phx.corporate-ir.net
- rads.mcafee.com
- ravantivirus.com
- report.bitdefender.com
- rs02.avast.com
- rs03.avast.com
- rs06.avast.com
- rs07.avast.com
- rs08.avast.com
- rs10.avast.com
- rs11.avast.com
- rs18.avast.com
- rs18.avast.com
- rs20.avast.com
- rs24.avast.com
- secure.nai.com
- securityresponse.symantec.com
- service1.symantec.com
- service1.symantec.com
- sm01.avast.com
- sm04.avast.com
- sm05.avast.com
- sm09.avast.com
- sm12.avast.com
- sm13.avast.com
- sm14.avast.com
- sm15.avast.com
- sm16.avast.com
- sm17.avast.com
- sm19.avast.com
- sm21.avast.com
- sm22.avast.com
- sm23.avast.com
- sm25.avast.com
- sophos.com
- sophos.com
- spd.atdmt.com
- support.microsoft.com
- symantec.com
- symantec.com
- trendmicro.com
- trendmicro.com
- update.symantec.com
- update.symantec.com
- updates.symantec.com
- updates1.kaspersky-labs.com
- updates2.kaspersky-labs.com
- updates3.kaspersky-labs.com
- updates4.kaspersky-labs.com
- updates5.kaspersky-labs.com
- upgrade.bitdefender.com
- upgrade.bitdefender.com
- us.mcafee.com
- vba32.de
- vil.nai.com
- viruslist.com
- viruslist.com
- viruslist.ru
- viruslist.ru
- windowsupdate.microsoft.com
- www.antivir.de
- www.anti-virus.by
- www.avast.com
- www.avira.com
- www.avp.ch
- www.avp.com
- www.avp.ru
- www.awaps.net
- www.bitdefender.com
- www.bitdefender.ru
- www.ca.com
- www.ca.com
- www.clamav.net
- www.clamwin.com
- www.drweb.com
- www.drweb.com
- www.fastclick.net
- www.f-secure.com
- www.grisoft.com
- www.hacksoft.com.pe
- www.hbedv.com
- www.kaspersky.com
- www.kaspersky.ru
- www.kaspersky-labs.com
- www.mcafee.com
- www.my-etrust.com
- www.nai.com
- www.networkassociates.com
- www.open.by
- www.pandasoftware.com
- www.ravantivirus.com
- www.sophos.com
- www.symantec.com
- www.trendmicro.com
- www.vba32.de
- www.viruslist.com
- www.viruslist.ru
- www2.eset.com
- www3.ca.com
- www3.ca.com
- zak.avira.com
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.
Writeup By: Takayoshi Nakayama
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