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TROJ_GORIADU.SMY

July 04, 2013
 Analysis by: Christopher Daniel So
 Modified by: jasperm
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


This DLL file acts as a notify object DLL used by TROJ_GORIADU.SMM (NDIS Intermediate driver), which contains specific parameters and configuration information.

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

PE

Memory Resident:

No

Initial Samples Received Date:

24 Jan 2011

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_GORIADU.DRP

Autostart Technique

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

HKEY_CLASSES_ROOT\CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}\
InProcServer32
@ = %System%\passthru.dll

HKEY_CLASSES_ROOT\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\
1.0\0\win32
@ = %System%\passthru.dll

Other System Modifications

This Trojan adds the following registry keys as part of its installation routine:

HKEY_CLASSES_ROOT\CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}

HKEY_CLASSES_ROOT\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}

Other Details

This Trojan does the following:

  • This DLL file acts as a notify object DLL used by TROJ_GORIADU.SMM (NDIS Intermediate driver), which contains specific parameters and configuration information.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.792.09

FIRST VSAPI PATTERN DATE:

25 Jan 2011

VSAPI OPR PATTERN File:

7.793.80

VSAPI OPR PATTERN Date:

25 Jan 2011

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_CLASSES_ROOT\CLSID
    • {df2e4f67-e93a-11d1-bb14-0000f8779051}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {38135D11-E93B-11D1-BB14-0000F8779051}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {df2e4f67-e93a-11d1-bb14-0000f8779051}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {38135D11-E93B-11D1-BB14-0000F8779051}

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_GORIADU.SMY. 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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