BKDR_VBBOT.AP
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type:
Destructiveness:
Encrypted:
In the wild: Yes
OVERVIEW
This Backdoor adds registry entries to enable its automatic execution at every system startup.
TECHNICAL DETAILS
155648 bytes
05 Apr 2010
Installation
This Backdoor drops the following files:
- %System%\MSCONFIG32.SYS
- %System%\~msw0.tmp
- %Program Files%\Java\jre6\bin\zf32.dll
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Autostart Technique
This Backdoor adds the following registry entries to enable its automatic execution at every system startup:
It drops the following files:
- %User Startup%\jucheck.exe
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)
SOLUTION
Step 1
Terminate the malware/grayware/spyware process:
Step 2
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.
- HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run\Java online update program
- %Application Data%\Java\jre6\bin\jucheck.exe=REG_SZ
Step 3
Search and delete these files
- %User Startup%\jucheck.exe
- %System%\MSCONFIG32.SYS
- %System%\~msw0.tmp
- %Program Files%\Java\jre6\bin\zf32.dll
Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
Step 4
Restore this file from backup Only Microsoft-related files will be restored. If this malware/grayware/spyware also deleted files related to programs that are not from Microsoft, please reinstall those programs on your computer again.
- %Program Files%\Java\jre6\bin\jucheck.exe
- %Application Data%\Java\jre6\bin\zf32.dll
- %Application Data%\Java\jre6\bin\jucheck.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as
BKDR_VBBOT.AP
*Note: 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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