BKDR_PLUGX.CB
Trojan-Dropper.Win32.Injector.iuwb (Kaspersky), Win32/Korplug.A trojan (Nod32)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
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.
It modifies the Internet Explorer Zone Settings.
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.
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
barckH
Recent File List =
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
barckH
Settings =
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MJ
CLSID = "{Random Hex Values}"
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.{BLOCKED}.133.161:80
- http://{BLOCKED}a.{BLOCKED}ofta.com
- http://{BLOCKED}a.{BLOCKED}ofta.com/update?id=000f9700
- http://{BLOCKED}a.{BLOCKED}ofta.com:81/update?id=000f9700
- http://{BLOCKED}a.{BLOCKED}ofta.com:443/update?id=000f9700
- http://{BLOCKED}a.{BLOCKED}ofta.com:12345/update?id=000f9700
It drops the following file(s)/component(s):
- %All Users Profile%\graphedt\NvSmart.hlp
(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.)
SOLUTION
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_CURRENT_USER\Software\Local AppWizard-Generated Applications\barckH
- Recent File List
- Recent File List
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\barckH
- Settings
- Settings
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\MJ
- CLSID = "{Random Hex Values}"
- CLSID = "{Random Hex Values}"
Step 5
Search and delete the files detected as BKDR_PLUGX.CB
*Note: Some component files may be hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
To stop the malware/grayware from running when certain files are opened:
For Windows 2000, Windows XP, and Windows Server 2003:
- Right-click Start then click Search....
- In the Named input box, type the name of the file that was detected earlier.
- In the Look In drop-down list, select My Computer then press Enter.
- Once located, select the file then press SHIFT+DELETE to delete it.
For Windows Vista and Windows 7:
- Click Start>Computer.
- In the Search Computer input box, type the name of the file detected earlier, and press Enter.
- Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
Step 6
Reset Internet security settings
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_PLUGX.CB. 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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