TROJ_CLICKER.ZD
Trojan.Win32.Generic!BT (Sunbelt)
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
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%\BHO Plugin
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
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\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\New Windows\Allow
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\bfast.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\linksynergy.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\qksrv.net
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\cc-dt.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\commission-junction.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\kqzyfj.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\jdoqocy.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\tkqlhce.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\dpbolvw.net
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\anrdoezrs.net
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\fastclick.com
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
P3P\History\fastclick.net
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Startup
HKEY_CLASSES_ROOT\CLSID\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}
HKEY_CLASSES_ROOT\CLSID\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}\
InProcServer32
HKEY_LOCAL_MACHINE\Software\BHO
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\New Windows\Allow
*.system-processes.com = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Startup
DisplayName = "BHO"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Startup
UninstallString = "%Program Files%\BHO Plugin\uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}\InProcServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}
1 = "2"
HKEY_LOCAL_MACHINE\SOFTWARE\BHO
ModId = "1"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\BHO Plugin\uninstall.exe
- %Program Files%\BHO Plugin\plugin.dll
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
This report is generated via an automated analysis system.
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_CURRENT_USER\Software\Microsoft\Internet Explorer\New Windows
- Allow
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- bfast.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- linksynergy.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- qksrv.net
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- cc-dt.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- commission-junction.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- kqzyfj.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- jdoqocy.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- tkqlhce.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- dpbolvw.net
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- anrdoezrs.net
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- fastclick.com
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History
- fastclick.net
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
- Startup
- In HKEY_CLASSES_ROOT\CLSID
- {9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}
- In HKEY_CLASSES_ROOT\CLSID\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}
- InProcServer32
- In HKEY_LOCAL_MACHINE\Software
- BHO
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_CURRENT_USER\Software\Microsoft\Internet Explorer\New Windows\Allow
- *.system-processes.com = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Startup
- DisplayName = "BHO"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Startup
- UninstallString = "%Program Files%\BHO Plugin\uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}\InProcServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{9BB5B49C-0D59-418d-A6A5-F6373B8FEF64}
- 1 = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\BHO
- ModId = "1"
Step 5
Search and delete these files
- %Program Files%\BHO Plugin\uninstall.exe
- %Program Files%\BHO Plugin\plugin.dll
Step 6
Search and delete this folder
- %Program Files%\BHO Plugin
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_CLICKER.ZD. 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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