Threat Explorer

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PUA.DexonAgent

PUA.DexonAgent

Updated:
June 23, 2016
Infection Length:
Varies
Name:
Dexon Agent
Version:
5.1.3.85
Publisher:
Dexon Software Inc. (SIIGO)
Risk Impact:
Low
Systems Affected:
Windows

Behavior

PUA.DexonAgent is a potentially unwanted application that remains on the computer when the user tries to uninstall it.

Antivirus Protection Dates

  • Initial Rapid Release version June 21, 2016
  • Latest Rapid Release version July 10, 2017 revision 022
  • Initial Daily Certified version June 21, 2016
  • Latest Daily Certified version July 11, 2017 revision 007
  • Initial Weekly Certified release date June 22, 2016
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Once executed, the application creates the following folders:
  • %System%\dat
  • %System%\dat\Dexon
  • %System%\dat\Dexon\Agent
  • %System%\dat\dxn

    The application then creates the following files:
    • %Windir%\Prefetch\7ZFM.EXE-0E30BD4B.pf
    • %Windir%\Prefetch\AGENT.EXE-00FBA22A.pf
    • %Windir%\Prefetch\AGENT.EXE-05419AA4.pf
    • %Windir%\Prefetch\AGENT.EXE-118C6280.pf
    • %Windir%\Prefetch\AGENTE_C.EXE-302A4A79.pf
    • %Windir%\Prefetch\AGENT_DISTRIB.EXE-37E85201.pf
    • %Windir%\Prefetch\AGENT_SETUP.EXE-1A1F6DF8.pf
    • %System%\dat\Dexon\Agent\02856c0d90a0b24706cd677ee4bd52f96f97672c.exe
    • %System%\dat\Dexon\Agent\0a058e770239f3e085277a9211a57a71.exe
    • %System%\dat\Dexon\Agent\7C9D59FEFDA2A7CD7DAB39B04F53B314.exe
    • %System%\dat\Dexon\Agent\Agent.exe
    • %System%\dat\Dexon\Agent\Agente_C.EXE
    • %System%\dat\Dexon\Agent\Agent_Distrib.exe
    • %System%\dat\Dexon\Agent\Agent_Setup.exe
    • %System%\dat\Dexon\Agent\c75ee487025f28c644eb91635fd4354b.exe
    • %System%\dat\Dexon\Agent\cfg.dxn
    • %System%\dat\Dexon\Agent\dexon.jpg
    • %System%\dat\Dexon\Agent\dexon_browser.exe
    • %System%\dat\Dexon\Agent\Dexon_RC.exe
    • %System%\dat\Dexon\Agent\Dexon_SSH.exe
    • %System%\dat\Dexon\Agent\Dial_w.exe
    • %System%\dat\Dexon\Agent\dmi16.exe
    • %System%\dat\Dexon\Agent\dummy.exe
    • %System%\dat\Dexon\Agent\DynamicService.exe
    • %System%\dat\Dexon\Agent\e94096fcaaf12dea18e5a465999778629f0f414c.exe
    • %System%\dat\Dexon\Agent\HD.dxn
    • %System%\dat\Dexon\Agent\HD_Agent.exe
    • %System%\dat\Dexon\Agent\HD_Labels.dxn
    • %System%\dat\Dexon\Agent\logmessages.dll
    • %System%\dat\Dexon\Agent\module01.dll
    • %System%\dat\Dexon\Agent\module02.dll
    • %System%\dat\Dexon\Agent\module04.dll
    • %System%\dat\Dexon\Agent\module05.dll
    • %System%\dat\Dexon\Agent\module09.dll
    • %System%\dat\Dexon\Agent\msvcr71.dll
    • %System%\dat\Dexon\Agent\ser.dxn
    • %System%\dat\Dexon\Agent\server_7.ico
    • %System%\dat\dxn\ASRWNNDNROYXSBUABWVYCPUQBBUZCHULHSBB.dat
    • %System%\dat\dxn\AVJFXLCNMKJDBZGDKJFBRWDBHVXCNXBDDRNB.dat
    • %System%\dat\dxn\BSIBZNJCGUNCJLTBLANBLCNSXGXFOBOAACMTRB.dat
    • %System%\dat\dxn\BWDBTINBSTJLFPDYJYCJHDXGSDOCFNZCKTGB.dat
    • %System%\dat\dxn\CGMCQXFDHKHDEPCQTBBDHYKDBWTDDTLMCQJZB.dat
    • %System%\dat\dxn\CRBBBJMDSBFCBTACXFMRBLFMSCLHTMNADSQAC.dat
    • %ProgramFiles%\Google\Update\1.3.30.3\psuser_64.dll

    Next, the application creates the following registry subkeys:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Dexon
    • HKEY_LOCAL_MACHINE\SOFTWARE\Dexon\DAT
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DEXONAGENT
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DEXONAGENT\0000
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DEXONAGENT\0000\Control
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\Parameters
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\Parameters\Tcpip
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\Security
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\Enum

    The application creates the following registry entry so that it runs every time Windows starts:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"Dexon" = "%System%\dat\Dexon\Agent\dummy.exe"

    The application then creates the following registry entries:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Dexon\DAT\"[RANDOM ALPHANUMERIC STRING]" = "[RANDOM ALPHANUMERIC STRING]"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DEXONAGENT\0000\"Service" = "DexonAgent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DEXONAGENT\0000\"Class" = "LegacyDriver"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DEXONAGENT\0000\"ClassGUID" = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DEXONAGENT\0000\"DeviceDesc" = "DexonAgent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DEXONAGENT\0000\Control\"ActiveService" = "DexonAgent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\GloballyOpenPorts\List\"445:TCP" = "445:TCP:*:Enabled:@xpsp2res.dll,-22005"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%System%\dat\Dexon\Agent\"Agent.exe" = "%System%\dat\Dexon\Agent\Agent.exe:*:Enabled:Dexon Agent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List\6008\"TCP" = "6008:TCP:*:Enabled:Dexon Agent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List\"443:TCP" = "443:TCP:*:Enabled:Dexon Agent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List\"445:TCP" = "445:TCP:*:Enabled:@xpsp2res.dll,-22005"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List\"6009:TCP" = "6009:TCP:*:Enabled:Dexon Agent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DexonAgent\"ImagePath" = "%System%\dat\Dexon\Agent\Agent.exe"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DexonAgent\"DisplayName" = "DexonAgent"
    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DexonAgent\"ObjectName" = "LocalSystem"
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\"ImagePath" = "%System%\dat\Dexon\Agent\Agent.exe"
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\"DisplayName" = "DexonAgent"
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\"ObjectName" = "LocalSystem"
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DexonAgent\Enum\"0" = "Root\LEGACY_DEXONAGENT\0000"
    • HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\Training Samples\Dexon1\0862BF6E37EB56862403740EC3EB5D96\dexon_2\"7C9D59FEFDA2A7CD7DAB39B04F53B314.exe" = "Dexon Agent"

    The application is a communications application that allows users to have remote access to or direct contact with an IT consultant over the internet. When installed, it creates a service and runs in the background. It automatically sets up a bind connection and listens to the local port 5001 for incoming connections in order to provide remote access. When the user attempts to uninstall, the application is reinstalled and maintains its persistence even when the user tries to end the application.

    You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

    Before proceeding further we recommend that you run a full system scan . If that does not resolve the problem you can try one of the options available below.



    FOR NORTON USERS
    If you are a Norton product user, we recommend you try the following resources to remove this risk.


    Removal Tool

    If you have an infected Windows system file, you may need to replace it using the Windows installation CD .


    How to reduce the risk of infection
    The following resources provide further information and best practices to help reduce the risk of infection.



    FOR BUSINESS USERS
    If you are a Symantec business product user, we recommend you try the following resources to remove this risk.


    Identifying and submitting suspect files
    Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.


    Removal Tool

    If you have an infected Windows system file, you may need to replace it using the Windows installation CD .


    How to reduce the risk of infection
    The following resource provides further information and best practices to help reduce the risk of infection.
    Protecting your business network



    MANUAL REMOVAL
    The following instructions pertain to all current Symantec antivirus products.


    1. Performing a full system scan
    How to run a full system scan using your Symantec product


    2. Restoring settings in the registry
    Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.