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  2. Security Response/
  3. Trojan.Scazip


Risk Level 1: Very Low

January 21, 2014
February 6, 2014 6:30:02 PM
Systems Affected:
Windows 98, Windows 95, Windows XP, Windows Server 2008, Windows 7, Windows Me, Windows Vista, Windows NT, Windows Server 2003, Windows 2000
Once executed, the Trojan creates the following files:
  • %CommonProgramFiles%\Microsoft Shared\Ink\InkObj.dat
  • %CommonProgramFiles%\Microsoft Shared\Ink\InkObj_
  • %System%\api-ms-win-core-xstate-l1-1-0.bin
  • %System%\api-ms-win-core-xstate-l1-1-0_
  • %System%\odbccr64.dll
  • %System%\odbccr64_
  • %Temp%\[RANDOM FILE NAME].tmp
  • %UserProfile%\Application
  • %UserProfile%\Application Data\Common Files\defrag.exe
  • %UserProfile%\Application Data\HTML Help\help.dat
  • %UserProfile%\Application Data\KuGou7\status.dat
  • %UserProfile%\Application Data\Microsoft\Media Player\PLearnL.DAT
  • %UserProfile%\Application Data\Microsoft\Werfault\WerFault.cfg
  • %UserProfile%\Application Data\Microsoft\Werfault\WerFault.dll
  • %Windir%\Performance\WinSAT\DataStore\Formal.Assessment.WinSAT.xml
  • %Windir%\Performance\WinSAT\ShaderCache.vs_3.0
  • Data\Identities\{116380ff-9f6a-4a90-9319-89ee4f513542}\disk1.img

The Trojan then sets a scheduled task with following files so that executes whenever Windows starts:
  • %Windir%\Tasks\ScheduledDefrag.job
  • %Windir%\Tasks\ScheduledDefrag_[CURRENT USER].job

It also creates the following folders:
  • %Temp%\HTML Help
  • %Windir%\CbsTemp
  • %Windir%\Healthy

The Trojan then creates the following registry entries
  • HKEY_CURRENT_USER\Software\Auslogics\{00000000-0000-0000-0000-000000000000}\RecoveryDataStore\"(Default)" = "%UserProfile%\Application Data\Identities\{116380ff-9f6a-4a90-9319-89ee4f513542}\disk1.img"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Auslogics\{00000000-0000-0000-0000-000000000000}\RecoveryDataStore\"(Default)" = "%UserProfile%\Application Data\Identities\{116380ff-9f6a-4a90-9319-89ee4f513542}\disk1.img"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\"NextInstance" = "1"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\0000\"Class" = "LegacyDriver"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\0000\"ClassGUID" = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\0000\"ConfigFlags" = "0"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\0000\"DeviceDesc" = "Smart Card uPNP Policy"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\0000\"Legacy" = "1"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_6TO4\0000\"Service" = "6to4"

Next, it creates the following registry subkeys:
  • HKEY_CURRENT_USER\Software\Microsoft\Remote Assistance\VSMSOUILanguage
  • HKEY_CURRENT_USER\Software\Microsoft\Windows Photo Viewer\BackupKey
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Remote Assistance\MainWindow
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Photo Viewer\BackupKey

The Trojan then creates a service with the following properties:
Display Name: Smart Card uPNP Policy
Description: Allows the system to be configured to lock the user desktop upon smart card removal
Image Path: %System%\svchost.exe -k netsvcs
Startup Type: Automatic

It then creates the following registry subkey to register the above service:

The Trojan then opens a back door on the compromised computer and may connect to any of the following command-and-control (C&C) servers:
  • foursquare.dyndns.tv
  • imaps.qki6.com
  • menmin.strezf.com
  • neuro.dyndns-at-home.com
  • static.jg7.org
  • tripadvisor.dyndns.info
  • wowwiki.dynalias.net
  • yelp.webhop.org

The Trojan may the perform the following actions on the compromised computer:
  • Create, move, or delete files
  • Execute files
  • Send system information to a remote location


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: Hatsuho Honda
Summary| Technical Details| Removal

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