TROJ_AGENT.BF
Adware:Win32/Windupdates (Microsoft); [00027754.EXE]:Adware-WinAd., [0001b954.EXE\0001b954.EXE]:Adware-WinAd., [000124b8.EXE\000124b8.EXE] (McAfee); Packed.Win32.CryptExe.gen (Kaspersky); WindUpdates.MediaAccess, WinAD Client, Backdoor.Poebot (fs) (Sunbelt); MemScan:Adware.Generic.32318 (FSecure)
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
279,639 bytes
EXE
Yes
20 Sep 2012
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%\Media Access
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Media Access = "%Program Files%\Media Access\MediaAccK.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\Media Access
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{735C5A0C-F79F-47A1-8CA1-2A2E482662A8}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\LoaderX.EXE
HKEY_CLASSES_ROOT\MediaAccess.Installer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MediaAccess.Installer\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MediaAccess.Installer\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\LocalServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\Implemented Categories
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\Implemented Categories\
{7DD95801-9882-11CF-9FA9-00AA006C42C4}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\Implemented Categories\
{7DD95802-9882-11CF-9FA9-00AA006C42C4}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Media Access
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Media Access
track = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\LoaderX.EXE
AppID = "{735C5A0C-F79F-47A1-8CA1-2A2E482662A8}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
AppID = "{735C5A0C-F79F-47A1-8CA1-2A2E482662A8}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Media Access
UninstallString = "%Program Files%\Media Access\MediaAccess.exe /Remove"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Media Access
DisplayName = "Media Access"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\Media Access\MediaAccC.dll
- %Program Files%\Media Access\MediaAccK.exe
- %Program Files%\Media Access\Info.txt
- %Program Files%\Media Access\MediaAccess.exe
- %System%\ide21201.vxd
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %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.)
This report is generated via an automated analysis system.
SOLUTION
9.200
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
Restart in Safe Mode
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
- Media Access
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
- {735C5A0C-F79F-47A1-8CA1-2A2E482662A8}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
- LoaderX.EXE
- In HKEY_CLASSES_ROOT
- MediaAccess.Installer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MediaAccess.Installer
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MediaAccess.Installer
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- LocalServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- Implemented Categories
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\Implemented Categories
- {7DD95801-9882-11CF-9FA9-00AA006C42C4}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}\Implemented Categories
- {7DD95802-9882-11CF-9FA9-00AA006C42C4}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{15696AE2-6EA4-47F4-BEA6-A3D32693EFC7}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {00ADA225-EA6C-4FB3-82E8-68189201CCB9}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
- Media Access
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\Microsoft\Windows\CurrentVersion\Run
- Media Access = "%Program Files%\Media Access\MediaAccK.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Media Access
- track = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\LoaderX.EXE
- AppID = "{735C5A0C-F79F-47A1-8CA1-2A2E482662A8}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E5F0D38-214B-4085-AD2A-D2290E6A2D2C}
- AppID = "{735C5A0C-F79F-47A1-8CA1-2A2E482662A8}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{00ADA225-EA6C-4FB3-82E8-68189201CCB9}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Access
- UninstallString = "%Program Files%\Media Access\MediaAccess.exe /Remove"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Access
- DisplayName = "Media Access"
Step 5
Search and delete these files
- %Program Files%\Media Access\MediaAccC.dll
- %Program Files%\Media Access\MediaAccK.exe
- %Program Files%\Media Access\Info.txt
- %Program Files%\Media Access\MediaAccess.exe
- %System%\ide21201.vxd
Step 6
Search and delete this folder
- %Program Files%\Media Access
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_AGENT.BF. 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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