TROJ_BODX.A

September 03, 2011
 Analysis by: Sabrina Sioting
 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 Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

90,112 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Aug 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following files:

  • %system%\MediaP.dll

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{C881E764-E445-4EAC-9480-898E25DAEE3B}

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\CLSID

HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\CurVer

HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay.1

HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay.1\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MediaMonitor.MediaPlay

HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay

It adds the following registry entries as part of its installation routine:

HKEY_CLASSES_ROOT\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\
InprocServer32
{default} = %system%\MediaP.dll

HKEY_CLASSES_ROOT\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\
1.0\0\win32
{default} = %system%\MediaP.dll

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\InprocServer32
{default} = %system%\MediaP.dll

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\1.0\
0\win32
{default} = %system%\MediaP.dll

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.388.04

FIRST VSAPI PATTERN DATE:

29 Aug 2011

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

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\Explorer\Browser Helper Objects\
    • {C881E764-E445-4EAC-9480-898E25DAEE3B}
  • In HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\
    • CLSID
  • In HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\
    • CurVer
  • In HKEY_CLASSES_ROOT\
    • MediaMonitor.MediaPlay.1
  • In HKEY_CLASSES_ROOT\
    • MediaMonitor.MediaPlay.1\CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
    • MediaMonitor.MediaPlay
  • In HKEY_CLASSES_ROOT\
    • MediaMonitor.MediaPlay

Step 3

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.

  • In HKEY_CLASSES_ROOT\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\InprocServer32
    • {default} = %system%\MediaP.dll
  • In HKEY_CLASSES_ROOT\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\1.0\0\win32
    • {default} = %system%\MediaP.dll
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\InprocServer32
    • {default} = %system%\MediaP.dll
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\1.0\0\win32
    • {default} = %system%\MediaP.dll

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. %system%\MediaP.dll

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_BODX.A 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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