TROJ_AGENT.AWRH


 PLATFORM:

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

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type:

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats.



  TECHNICAL DETAILS

File Size:

14848 bytes

Memory Resident:

Yes

Initial Samples Received Date:

17 Dec 2009


Other System Modifications


This Trojan adds the following registry keys:



Download Routine


This Trojan connects to the following malicious URLs:


  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Policies\Explorer\Run\ctfmom
    %System%\ctfnom.exe

    • {BLOCKED}
    • {BLOCKED}



Other Details


This Trojan adds the following lines or registry entries as part of its routine:

      • %User Temp%\suicide.bat

    (Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)


      SOLUTION


    Step 1


    Terminate the malware/grayware/spyware process:

    [ Learn More ]
    Notes=
  • For Windows 98 and ME users, Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  • If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  • If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.


  • Step 2


    Delete this registry value

    [ 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.

    • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\cd46e497
      • UID=2s1QpI63gbWc24x
      • LastUpdateTime=4a6033de
    • HKEY_CLASSES_ROOT\CLSID\{9813B1C3-32B9-1B69-AACD-57F6959FDBB3}\InProcServer32
      • (Default)={malware path and filename}
      • ThreadingModel=Apartment
    • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\ShellServiceObjectDelayLoad
      • PgFhPP={9813B1C3-32B9-1B69-AACD-57F6959FDBB3}


    Step 3


    Restore this modified registry value

    [ 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.

    • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\cd46e497
      • From: LastUpdateTime=4a6033df
        + To: LastUpdateTime=4a6033de
      • From: LastUpdateTime=4a6033e4
        + To: LastUpdateTime=4a6033df
      • From: LastUpdateTime=4a6033e9
        + To: LastUpdateTime=4a6033e4
      • From: LastUpdateTime=4a6033ef
        + To: LastUpdateTime=4a6033e9
      • From: LastUpdateTime=4a6033f4
        + To: LastUpdateTime=4a6033ef


    Step 4


    Scan your computer with your Trend Micro product to delete files detected as
    TROJ_AGENT.AWRH


    *Note: 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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