TROJ_BHO.MDJ
TrojanDownloader:Win32/Zlob.AFM (Microsoft); Puper (McAfee); Backdoor.Trojan (Symantec); Trojan-Dropper.Win32.Agent.akga (Kaspersky); Trojan-Dropper.Win32.Agent (Sunbelt); Trojan horse BHO.IDY (AVG)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
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
121,352 bytes
EXE
No
08 May 2013
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 creates the following folders:
- %Program Files%\CMVideoPlugin
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsn5.tmp
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This Trojan 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\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\nsm1.tmp
- %User Temp%\nsn5.tmp
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\CMVideo.DLL
HKEY_CLASSES_ROOT\CMVideo.XMLDOMDocumentEventsSink.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CMVideo.XMLDOMDocumentEventsSink.1\CLSID
HKEY_CLASSES_ROOT\CMVideo.XMLDOMDocumentEventsSink
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CMVideo.XMLDOMDocumentEventsSink\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CMVideo.XMLDOMDocumentEventsSink\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\TypeLib
HKEY_CLASSES_ROOT\CMVideo.CMVideoPlugin.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CMVideo.CMVideoPlugin.1\CLSID
HKEY_CLASSES_ROOT\CMVideo.CMVideoPlugin
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CMVideo.CMVideoPlugin\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CMVideo.CMVideoPlugin\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}\TypeLib
HKEY_CURRENT_USER\Software\CMVideoPlugin
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\CMVideo.DLL
AppID = "{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
AppID = "{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
AppID = "{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
NoExplorer = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}\TypeLib
Version = "1.0"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v0 = "%Program Files%\CMVideoPlugin"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v6 = "cb61d8b9fa9b29af37794707f798bc4a"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v5 = "5268f722-a872-46e2-b365-11b7157dd288"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v4 = "http://{BLOCKED}astdownload.com"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v3 = "13"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v2 = "47"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v1 = "http://{BLOCKED}v.com/service/index.php;http://{BLOCKED}v.cn/service/index.php"
HKEY_CURRENT_USER\Software\CMVideoPlugin
v7 = "Mw?îΧæ.oF"
Dropping Routine
This Trojan drops the following files:
- %System%\CMVideo.dll
- %User Temp%\nsn5.tmp\System.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
9.300
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
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\Classes\AppID
- {7F654B15-B4FE-474E-B5B8-95D7007CFFE1}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
- CMVideo.DLL
- In HKEY_CLASSES_ROOT
- CMVideo.XMLDOMDocumentEventsSink.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CMVideo.XMLDOMDocumentEventsSink.1
- CLSID
- In HKEY_CLASSES_ROOT
- CMVideo.XMLDOMDocumentEventsSink
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CMVideo.XMLDOMDocumentEventsSink
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CMVideo.XMLDOMDocumentEventsSink
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {BA886909-DB96-4F2A-B485-192DE0072690}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
- TypeLib
- In HKEY_CLASSES_ROOT
- CMVideo.CMVideoPlugin.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CMVideo.CMVideoPlugin.1
- CLSID
- In HKEY_CLASSES_ROOT
- CMVideo.CMVideoPlugin
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CMVideo.CMVideoPlugin
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CMVideo.CMVideoPlugin
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{053A21A6-3E12-4A2D-BBCE-FCEAF96CF905}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {ABEF1B85-C782-441E-B2AD-78EFF90A47C8}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}
- TypeLib
- In HKEY_CURRENT_USER\Software
- CMVideoPlugin
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_LOCAL_MACHINE\SOFTWARE\Classes\AppID\CMVideo.DLL
- AppID = "{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA886909-DB96-4F2A-B485-192DE0072690}
- AppID = "{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- AppID = "{7F654B15-B4FE-474E-B5B8-95D7007CFFE1}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{2DA9EA79-910A-4CD2-AEC4-ED2B74BDD572}
- NoExplorer = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{FE422D6A-7A7E-4436-AAE8-D4053D1EB96A}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{ABEF1B85-C782-441E-B2AD-78EFF90A47C8}\TypeLib
- Version = "1.0"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v0 = "%Program Files%\CMVideoPlugin"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v6 = "cb61d8b9fa9b29af37794707f798bc4a"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v5 = "5268f722-a872-46e2-b365-11b7157dd288"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v4 = "http://{BLOCKED}astdownload.com"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v3 = "13"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v2 = "47"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v1 = "http://{BLOCKED}v.com/service/index.php;http://{BLOCKED}v.cn/service/index.php"
- In HKEY_CURRENT_USER\Software\CMVideoPlugin
- v7 = "Mw?îΧæ.oF"
Step 5
Search and delete these components
- %System%\CMVideo.dll
- %User Temp%\nsn5.tmp\System.dll
Step 6
Search and delete these folders
- %Program Files%\CMVideoPlugin
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsn5.tmp
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_BHO.MDJ. 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.
Step 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %User Temp%\nsm1.tmp
- %User Temp%\nsn5.tmp
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