Discovered: November 8, 2004
Updated: February 13, 2007 12:29:40 PM
Also Known As: Backdoor.Win32.Agobot.gen [Kas
Type: Worm
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows Server 2003, Windows XP
When W32.Gaobot.BQJ is executed, it performs the following actions:
- Creates the following copy of itself:
%System%\bcvsrv32.exe
- Adds the value:
"Bcvsrv32" = "bcvsrv32.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 executes every time Windows starts.
- Creates a service whose display and service name are "bcyws".
- Creates the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\bcyws
- Connects to a predetermined IRC server on TCP port 7000 and awaits commands from an attacker.
This allows the attacker to perform some of the following actions on the infected computer:
- Download and execute files
- Scan the network
- List, stop, and start processes
- Start, stop, and register services
- Delete, create, and list files
- Launch Denial of Service (DoS) attacks
- Perform port redirection
- Start a socks proxy server
- Start an FTP server
- Steal Windows product keys
- Log keystrokes
- Start identd on TCP port 113
- Add or delete local shares
- Opens three randomly chosen TCP ports.
- Attempts to infect other computers by looking for backdoors opened by other malicious threats and by exploiting the following vulnerabilities:
- Lowers security settings and attempts to block access to several security related Web sites. It does this by appending the following lines to the hosts file:
127.0.0.1 www.trendmicro.com
127.0.0.1 trendmicro.com
127.0.0.1 rads.mcafee.com
127.0.0.1 customer.symantec.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 us.mcafee.com
127.0.0.1 updates.symantec.com
127.0.0.1 update.symantec.com
127.0.0.1 www.nai.com
127.0.0.1 nai.com
127.0.0.1 secure.nai.com
127.0.0.1 dispatch.mcafee.com
127.0.0.1 download.mcafee.com
127.0.0.1 www.my-etrust.com
127.0.0.1 my-etrust.com
127.0.0.1 mast.mcafee.com
127.0.0.1 ca.com
127.0.0.1 www.ca.com
127.0.0.1 networkassociates.com
127.0.0.1 www.networkassociates.com
127.0.0.1 avp.com
127.0.0.1 www.kaspersky.com
127.0.0.1 www.avp.com
127.0.0.1 kaspersky.com
127.0.0.1 www.f-secure.com
127.0.0.1 f-secure.com
127.0.0.1 viruslist.com
127.0.0.1 www.viruslist.com
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 mcafee.com
127.0.0.1 www.mcafee.com
127.0.0.1 sophos.com
127.0.0.1 www.sophos.com
127.0.0.1 symantec.com
127.0.0.1 securityresponse.symantec.com
127.0.0.1 www.symantec.com
- Sends HTTP GET requests to the following hosts on TCP port 80 to measure connection speed:
- de.yahoo.com
- nitro.ucsc.edu
- verio.fr
- www.1und1.de
- www.above.net
- www.belwue.de
- www.burst.net
- www.cogentco.com
- www.d1asia.com
- www.level3.com
- www.lib.nthu.edu.tw
- www.nifty.com
- www.nocster.com
- www.rit.edu
- www.schlund.net
- www.st.lib.keio.ac.jp
- www.stanford.edu
- www.switch.ch
- www.utwente.nl
- www.verio.com
- www.xo.net
- yahoo.co.jp
- Attempts to steal CD keys for a number of computer games.
- Attempts to lower security settings by terminating the following processes, some of which may be security related:
- _AVP32.EXE
- _AVPCC.EXE
- _AVPM.EXE
- 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
- ATWATCH.EXE
- AU.EXE
- AUPDATE.EXE
- AUTODOWN.EXE
- AUTOTRACE.EXE
- AUTOUPDATE.EXE
- AVPUPD.EXE
- AVWUPD32.EXE
- AVXQUAR.EXE
- CONSOL.EXE
- F-AGOBOT.EXE
- HIJACKTHIS.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
- NVARCH16.EXE
- NVC95.EXE
- NVSVC32.EXE
- NWINST4.EXE
- NWSERVICE.EXE
- NWTOOL16.EXE
- OLLYDBG.EXE
- ONSRVR.EXE
- OPTIMIZE.EXE
- OSTRONET.EXE
- OTFIX.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
- PENIS.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
- PUSSY.EXE
- PVIEW95.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
- SCRSVR.EXE
- SCVHOST.EXE
- SD.EXE
- SERV95.EXE
- SERVICE.EXE
- SERVLCE.EXE
- SERVLCES.EXE
- SETUP_FLOWPROTECTOR_US.EXE
- SETUPVAMEEVAL.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
- SSG_4104.EXE
- SSGRATE.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
- TDS2-98.EXE
- TDS2-NT.EXE
- TDS-3.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
- 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
- WIN32.EXE
- WIN32US.EXE
- WINACTIVE.EXE
- WIN-BUGSFIX.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
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: Candid Wueest
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