BKDR_BODX.A
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This backdoor attempts to connect to a server via HTTP. If the connection is successful, it may do certain actions. It is also capable of obtaining email addresses by querying a certain registry.
This backdoor 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
Arrival Details
This backdoor 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 backdoor drops the following files:
- %System%\MediaP.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Autostart Technique
This backdoor 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 backdoor 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"
NOTES:
It attempts to connect to the following server via HTTP:
- http://www.{BLOCKED}babys.com
It appends the following to the server URL:
- /{BLOCKED}-bin/{BLOCKED}in.cgi
- /{BLOCKED}-bin/{BLOCKED}ee.cgi
- /{BLOCKED}-bin/{BLOCKED}st.cgi
- /{BLOCKED}-bin/{BLOCKED}ol.cgi
If the connection is successful, it may do the following:
- Download / execute file
- Execute commands using cmd.exe
- List processes and modules
- Obtain system information (OS, hard disk / drive information, net
- Send file to {server}/cgi-bin/tool.cgi via HTTP POST
It is also capable of obtaining email addresses by querying the following registry:
HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
SMTP Email Address
SOLUTION
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
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}
- {C881E764-E445-4EAC-9480-898E25DAEE3B}
- In HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\
- CLSID
- CLSID
- In HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\
- CurVer
- CurVer
- In HKEY_CLASSES_ROOT\
- MediaMonitor.MediaPlay.1
- MediaMonitor.MediaPlay.1
- In HKEY_CLASSES_ROOT\
- MediaMonitor.MediaPlay.1\CLSID
- MediaMonitor.MediaPlay.1\CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
- MediaMonitor.MediaPlay
- MediaMonitor.MediaPlay
- In HKEY_CLASSES_ROOT\
- MediaMonitor.MediaPlay
- MediaMonitor.MediaPlay
Step 4
Delete this registry value
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
- {default} = %System%\MediaP.dll
- In HKEY_CLASSES_ROOT\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\1.0\0\win32
- {default} = %System%\MediaP.dll
- {default} = %System%\MediaP.dll
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\InprocServer32
- {default} = %System%\MediaP.dll
- {default} = %System%\MediaP.dll
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\1.0\0\win32
- {default} = %System%\MediaP.dll
- {default} = %System%\MediaP.dll
Step 5
Search and delete this file
- %System%\MediaP.dll
Step 6
Scan your computer with your Trend Micro product to delete files detected as BKDR_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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