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TROJ_FAKEAV.BBM

June 27, 2009
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.



This Trojan may be downloaded from remote sites by other malware.



It adds registry entries to enable its automatic execution at every system startup.



  TECHNICAL DETAILS

File Size:

116235 bytes

Memory Resident:

Yes

Initial Samples Received Date:

16 Apr 2009


Arrival Details


This Trojan may be downloaded from remote site(s) by the following malware:



    Installation


    This Trojan drops the following copies of itself into the affected system:

    • %{All Users Profile}%\Application Data\{random name}\{random name}.exe



    Autostart Technique


    This Trojan adds the following registry entries to enable its automatic execution at every system startup:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
    Windows\CurrentVersion\Run
    {random name} = "%All Users Profile%\Application Data\{random name}\{random name}.exe"



    Other System Modifications


    This Trojan adds the following registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
    Windows\CurrentVersion\Uninstall\
    SystemSecurity2009
    (Default) =  


      SOLUTION

    Minimum Scan Engine:

    8.700

    FIRST VSAPI PATTERN FILE:

    5.971.00

    FIRST VSAPI PATTERN DATE:

    16 Apr 2009

    VSAPI OPR PATTERN File:

    6.231.00

    VSAPI OPR PATTERN Date:

    27 Jun 2009


    Step 1


    For Windows ME and XP users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.


    Step 2


    Restart in Safe Mode

    [ Learn More ]


    Step 3


    Delete this registry key

    [ Learn More ]

    Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer"s registry.

    • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
      • SystemSecurity2009


    Step 4


    Search and delete this file

    [ Learn More ]
    There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
    • %User Profile%\Start Menu\Programs\System Security\System Security


    Step 5


    Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.BBM If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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