Trojan.Mitglieder.P

1. Creates the following copy if itself:
   
   %System%\[original file name].exe
   
   Notes:
   • Where [original file name].exe is the name of the original Trojan file that was downloaded on to the compromised computer.
   • %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).
     
     
2. Adds the value:
   
   "dm_service" = "%System%\[original file name].exe "
   
   to the registry subkey:
   
   HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   
   so that it is executed every time Windows starts.
   
   
3. Adds the values:
   
   "pid" = "[Process ID]"
   "port" = "[Listening Proxy Port]"
   "rel" = "[release number]"
   "ntf" = "[number]"
   
   to the registry subkey:
   
   HKEY_CURRENT_USER\SOFTWARE\SystemPref
   
   so that it is executed every time Windows starts.
   
   
4. Displays the following messages:
   
   Title: Screen Saver Slide Show...
   Message:
   Downloading album: Britney Spears. Please wait...
   Important!!! Users with firewall or Windows XP SP2:
   On firewall alert please allow program to make connections to internet otherwise it will not work.
   
   
   
   Title: Critical Error
   Message: Server overload, please try later.
   
   
   
   
5. Opens a randomly chosen TCP port between 2000 to 49999, which may be used as a back door and a covert proxy. A remote attacker may perform the following actions:
   
   
   • Download an updated version of itself.
   • Relay email.
     
     
6. Ends the following processes, some of which may be security-related:
   
   
   • AVPCC.EXE
   • ATUPDATER.EXE
   • AVWUPD32.EXE
   • AVPUPD.EXE
   • LUALL.EXE
   • DRWEBUPW.EXE
   • ICSSUPPNT.EXE
   • ICSUPP95.EXE
   • UPDATE.EXE
   • NUPGRADE.EXE
   • AUPDATE.EXE
   • AUTODOWN.EXE
   • AUTOTRACE.EXE
   • AUTOUPDATE.EXE
   • AVXQUAR.EXE
   • CFIAUDIT.EXE
   • MCUPDATE.EXE
   • OUTPOST.EXE
   • AVP32.EXE
   • _AVPM.EXE
   • ACKWIN32.EXE
   • ANTI-TROJAN.EXE
   • ANTS.EXE
   • APVXDWIN.EXE
   • AVCONSOL.EXE
   • AVE32.EXE
   • AVGCTRL.EXE
   • AVKSERV.EXE
   • AVLTMAIN.EXE
   • AVNT.EXE
   • AVP.EXE
   • AVPCC.EXE
   • AVPM.EXE
   • AVPTC32.EXE
   • AVSCHED32.EXE
   • BLACKD.EXE
   • BLACKICE.EXE
   • CCAPP.EXE
   • CFGWIZ.EXE
   • CFIADMIN.EXE
   • CFINET.EXE
   • CLEANER.EXE
   • CLEANER3.EXE
   • DLLHOST.EXE
   • DVP95.EXE
   • F-AGNT95.EXE
   • F-PROT.EXE
   • FINDVIRU.EXE
   • FP-WIN.EXE
   • FRW.EXE
   • IAMAPP.EXEIAMSERV.EXE
   • IBMASN.EXE
   • ICLOAD95.EXE
   • ICLOADNT.EXE
   • ICMON.EXE
   • ICSUPPNT.EXE
   • IFACE.EXE
   • LOCKDOWN2000.EXE
   • MOOLIVE.EXE
   • MPFTRAY.EXE
   • MSBLAST.EXE
   • MSPATCH.EXE
   • N32SCANW.EXE
   • NAVAPSVC.EXE
   • NAVAPW32.EXE
   • NAVW32.EXE
   • NAVWNT.EXE
   • NISUM.EXE
   • OUTPOST.EXE
   • PANDA
   • PAVCL.EXE
   • PAVSCHED.EXE
   • PAVW.EXE
   • PENIS32.EXE
   • QCONSOLE.EXE
   • RAV7
   • SCAN32.EXE
   • SCANPM.EXE
   • SCRSCAN.EXE
   • SERV95.EXE
   • SPHINX.EXE
   • TCA.EXE
   • TFTPD.EXE
   • VSCAN40.EXE
   • VSECOMR.EXE
   • VSHWIN32.EXE
   • VSMON.EXE
   • VSSTAT.EXE
   • WEBSCANX.EXE
   • WFINDV32.EXE
   • WINPPR32.EXE
   • WRADMIN.EXE
   • WRCTRL.EXE
   • WUPDMGR.EXE
   • ZONEALARM.EXE
   • _AVP32.EXE
   • WINPPR32.EXE
   • DFW.EXE
   • FSAV32.EXE
   • FSBWSYS.EXE
   • FSGK32.EXE
   • FSM32.EXE
   • FSSM32.EXE
   • FVPROTECT.EXE
   • MCAGENT.EXE
   • NAVDX.EXE
   • NAVSTUB.EXE
   • NC2000.EXE
   • NDD32.EXE
   • NETARMOR.EXE
   • NETINFO.EXE
   • NETMON.EXE
   • NMAIN.EXE
   • NPROTECT.EXE
   • NTVDM.EXE
   • OSTRONET.EXE
   • PCCGUIDE.EXE
   • PCCIOMON.EXE
   • TNBUTIL.EXE
   • VBCONS.EXE
   • VBSNTW.EXE
   • VBUST.EXE
   • VSMAIN.EXE
   • ZONALARM.EXE
     
     
7. Gathers email addresses from files with the following extensions:
   
   
   • .wab
   • .txt
   • .msg
   • .htm
   • .stm
   • .xml
   • .dbx
   • .mbx
   • .mdx
   • .eml
   • .nch
   • .mmf
   • .ods
   • .cfg
   • .asp
   • .php
   • .wsh
   • .adb
   • .tbb
   • .sht
   • .xls
   • .oft
   • .uin
   • .cgi
   • .mht
   • .jsp
   • .pl
   • .html
   • .shtm
   • .dhtm
     
     
8. Stores the stolen email addresses in %System%\drv.dll, and may send the file to a server on the freehostedistesonline.com domain.
   
   
9. Attempts to download an updated version of itself from the tricomtechlimisted.com domain.

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.