Worm:W32/AutoRun.BV

Classification

Malware

Worm

W32

W32/Voterai.worm, Worm.Win32.AutoRun.bqg, W32/Voter-B

Summary

Worm:W32/AutoRun.BV is a worm that propagates by dropping copies of itself on shared and removable drives. It has the appearance of a document file used for stealth purposes.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

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Technical Details

Worm:W32/AutoRun.BV is a worm that propagates by dropping copies of itself on shared and removable drives.It uses the appearance of a document file for stealth purposes.Upon execution, this worm will drop a copy of itself in the following directory:

  • [Windows system directory]\drivers\

It uses the same file name of the initially executed file, thus the filename may vary.It also drops the following files in various directories:

  • [Desktop]\Raila Odinga.gif - a non-malicious and damaged image file.
  • [Temp]\[Random Directory]\system.dll - a non-malicious component file.
  • [Start Menu]\Programs\Startup\[original worm filename].lnk - an auto start link pointing to the dropped malware file.

The image file is damaged but contains references to Raila Odinga, a Kenyan politician. The worm attempts to open this file multiple times which can adversely affect the system performance.It also adds the following registry entry to enable its automatic execution upon system startup:

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run [Default] = "[Windows system directory]\drivers \[malware filename]"

Note: The data in the autostart registry points to the malware but omits the file extension.It will also attempts to drop copies of itself in writable shared and removable drives.It can either use the filename of the executed worm or it can obtain filenames from the target directory then change their extension later.

Date Created: 2008-01-11 06:07:17.0

Date Last Modified: 2008-01-11 13:23:56.0