BKDR_PLUGX.BVM
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 modifies the Internet Explorer Zone Settings.
TECHNICAL DETAILS
188,416 bytes
DLL
Yes
11 Oct 2013
Arrival Details
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.
Other System Modifications
This backdoor adds the following registry keys:
HKEY_CLASSES_ROOT\MJ
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MJ
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
User Agent
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
User Agent\Post Platform
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
5.0\User Agent
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
5.0\User Agent\Post Platform
It adds the following registry entries:
HKEY_CLASSES_ROOT\MJ
CLSID = "{random}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MJ
CLSID = "{random}"
Web Browser Home Page and Search Page Modification
This backdoor modifies the Internet Explorer Zone Settings.
Other Details
This backdoor connects to the following possibly malicious URL:
- {BLOCKED}.{BLOCKED}.151.27:443
SOLUTION
9.300
10.342.07
16 Oct 2013
10.343.00
16 Oct 2013
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
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_CLASSES_ROOT
- MJ
- MJ
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- MJ
- MJ
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- User Agent
- User Agent
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0
- User Agent
- User Agent
Step 4
Reset Internet security settings
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_PLUGX.BVM. 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.