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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. It may be dropped by other malware.
It executes commands from a remote malicious user, effectively compromising the affected system.
It deletes itself after execution.
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.
It may be dropped by the following malware:
This backdoor drops the following copies of itself into the affected system:
(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)
It drops the following file(s)/component(s):
It creates the following folders:
It injects threads into the following normal process(es):
Other System Modifications
This backdoor adds the following registry keys as part of its installation routine:
HKEY_CURRENT_USER\Software\Microsoft\ Windows\CurrentVersion\Internet Setttings\ 5.0\User Agent
HKEY_CURRENT_USER\Software\Microsoft\ Windows\CurrentVersion\Internet Setttings\ User Agent
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent\Post Platform
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent\Post Platform
This backdoor executes the following commands from a remote malicious user:
It connects to the following URL(s) to send and receive commands from a remote malicious user:
This backdoor deletes itself after execution.
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Remove the malware/grayware file that dropped/downloaded BKDR_PLUGX.ZTBD-A
Restart in Safe Mode
To restart in Safe Mode:
• For Windows 2000 users
• For Windows XP users
• For Windows Server 2003 users
• For Windows Vista and Windows 7 users
Search and delete these folders
To delete malware/grayware/spyware folders:
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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.
To delete the registry key this malware/grayware/spyware created:
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_PLUGX.ZTBD-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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