Analysis by: Christopher Daniel So
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

Tamaño del archivo 335,885 bytes
Tipo de archivo DLL
Residente en memoria No
Fecha de recepción de las muestras iniciales 10 Nov 2009

Arrival Details

This Trojan may be dropped by other malware.

Autostart Technique

This Trojan adds the following registry entries to install itself as a Browser Helper Object (BHO):

HKEY_CLASSES_ROOT\main.BHO
(Default) = "Browser Helper Object"

HKEY_CLASSES_ROOT\main.BHO\CLSID
(Default) = "{AFD4AD01-58C1-47DB-A404-FBE00A6C5486}"

HKEY_CLASSES_ROOT\main.BHO\CurVer
(Default) = "main.BHO.1"

HKEY_CLASSES_ROOT\main.BHO.1
(Default) = "Browser Helper Object"

HKEY_CLASSES_ROOT\main.BHO.1\CLSID
(Default) = "{AFD4AD01-58C1-47DB-A404-FBE00A6C5486}"

HKEY_CLASSES_ROOT\CLSID\{AFD4AD01-58C1-47DB-A404-FBE00A6C5486}
(Default) = "Browser Helper Object"

HKEY_CLASSES_ROOT\CLSID\{AFD4AD01-58C1-47DB-A404-FBE00A6C5486}\
InprocServer32
(Default) = "{malware path and file name}"

HKEY_CLASSES_ROOT\CLSID\{AFD4AD01-58C1-47DB-A404-FBE00A6C5486}\
TypeLib
(Default) = "{8E3C68CD-F500-4A2A-8CB9-132BB38C3573}"

HKEY_CLASSES_ROOT\TypeLib\{8E3C68CD-F500-4A2A-8CB9-132BB38C3573}\
1.0
(Default) = "mainLib"

HKEY_CLASSES_ROOT\TypeLib\{8E3C68CD-F500-4A2A-8CB9-132BB38C3573}\
1.0\0\win32
(Default) = "{malware path and file name}"

  SOLUTION

Motor de exploración mínimo 8.900
Archivo de patrones de VSAPI 7.520.12
Fecha de publicación de patrones de VSAPI 07 Oct 2010
Fecha de publicación de patrones de VSAPI 10/7/2010 12:00:00 AM
Primer archivo de patrones de VSAPI 6.618.03
Primera fecha de publicación de patrones de VSAPI 10 Nov 2009
Versión de patrones OPR de VSAPI 7.521.00
Fecha de publicación de patrones OPR de VSAPI 07 Oct 2010

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Close all opened browser windows

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_CLASSES_ROOT
    • main.BHO
  • In HKEY_CLASSES_ROOT
    • main.BHO.1
  • In HKEY_CLASSES_ROOT\CLSID
    • {AFD4AD01-58C1-47DB-A404-FBE00A6C5486}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {8E3C68CD-F500-4A2A-8CB9-132BB38C3573}

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_EXEDOT.Q. 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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