BKDR_LBAB.A
Trojan.Win32.BHO.bnwy (Kaspersky), W32/BHO.BNWY!tr (Fortinet)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor may be dropped by other malware.
TECHNICAL DETAILS
Varies
PE
Yes
01 Jul 2011
Arrival Details
This backdoor may be dropped by the following malware:
- TROJ_MDROP.GVJ
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 registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:
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
HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay.1
HKEY_CLASSES_ROOT\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}
HKEY_CLASSES_ROOT\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}
HKEY_CLASSES_ROOT\Interface\{0DACF5D7-F1C0-4A37-B2A9-E03A9FBEB426}
It adds the following registry entries:
HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay
(Default) = "MediaPlay Class"
HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\CLSID
(Default) = "{C881E764-E445-4EAC-9480-898E25DAEE3B}"
HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay\CurVer
(Default) = "MediaMonitor.MediaPlay.1"
HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay.1
(Default) = "MediaPlay Class"
HKEY_CLASSES_ROOT\MediaMonitor.MediaPlay.1\CLSID
(Default) = "{C881E764-E445-4EAC-9480-898E25DAEE3B}"
HKEY_CLASSES_ROOT\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}
(Default) = "MediaPlay Class"
HKEY_CLASSES_ROOT\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\
InprocServer32
(Default) = "%System%\MediaP.dll"
HKEY_CLASSES_ROOT\CLSID\{C881E764-E445-4EAC-9480-898E25DAEE3B}\
TypeLib
(Default) = "{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}"
HKEY_CLASSES_ROOT\Interface\{0DACF5D7-F1C0-4A37-B2A9-E03A9FBEB426}
(Default) = "IMediaPlay"
HKEY_CLASSES_ROOT\Interface\{0DACF5D7-F1C0-4A37-B2A9-E03A9FBEB426}\
TypeLib
(Default) = "{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}"
HKEY_CLASSES_ROOT\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\
1.0
(Default) = "MediaMonitor 1.0 Type Library"
HKEY_CLASSES_ROOT\TypeLib\{0E05704B-07AB-41EB-8A17-F007AFBB5AA5}\
1.0\0\win32
(Default) = "%System%\MediaP.dll"
NOTES:
It connects to the following URL when Internet Explorer is opened:
- http://www.{BLOCKED}babys.com/cgi-bin/mmlogin.cgi
SOLUTION
8.900
8.260.04
01 Jul 2011
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 3
Close all opened browser windows
Step 4
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
- MediaMonitor.MediaPlay
- In HKEY_CLASSES_ROOT
- MediaMonitor.MediaPlay.1
- MediaMonitor.MediaPlay.1
- In HKEY_CLASSES_ROOT\CLSID
- {C881E764-E445-4EAC-9480-898E25DAEE3B}
- {C881E764-E445-4EAC-9480-898E25DAEE3B}
- In HKEY_CLASSES_ROOT\TypeLib
- {0E05704B-07AB-41EB-8A17-F007AFBB5AA5}
- {0E05704B-07AB-41EB-8A17-F007AFBB5AA5}
- In HKEY_CLASSES_ROOT\Interface
- {0DACF5D7-F1C0-4A37-B2A9-E03A9FBEB426}
- {0DACF5D7-F1C0-4A37-B2A9-E03A9FBEB426}
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_LBAB.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.
Did this description help? Tell us how we did.