Skip to main content
Skip to main content
Microsoft Security Intelligence
Cart 0 items in shopping cart
Sign in
Published Jul 26, 2009 | Updated Sep 15, 2017

Worm:Win32/VB.HA

Detected by Microsoft Defender Antivirus

Aliases: Win32/Xema.worm.82944.U (AhnLab) Worm.Win32.VB.aom (Kaspersky) W32/Autorun-AIV (Sophos) Win32/AutoRun.VB.CN (ESET) W32/Autorun.worm!n (McAfee)

Summary

Worm:Win32/VB.HA is a worm that spreads by copying itself to removable drives. It also modifies the affected computer's hosts file and may download and execute arbitrary files.
Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.
 
This threat may make lasting changes to an affected system’s configuration that will NOT be restored by detecting and removing this threat. For more information on returning an affected system to its pre-infected state, please see the following instructions:
To recreate a clean HOSTS file:
  1. Click Start, and click Run.
  2. Open the Hosts file, according to operating system:

    On Windows 95, Windows 98, or Windows ME systems:
    In the Open field, type: notepad %windir%\hosts

    On Windows NT-based operating systems, such as Windows 2000 or Windows XP:
    In the Open field, type: notepad<system folder>\drivers\etc\hosts
    -- for example, on Windows 2000:
    In the Open field, type: notepad C:\WINNT\system32\drivers\etc\hosts
    -- or on Windows XP:
    In the Open field, type: notepad C:\Windows\system32\drivers\etc\hosts

    On Windows Vista:
    Click Start, click All Programs, click Accessories, right-click Notepad, and then click Run as administrator
    Click File, click Open, type: %windir%\system32\drivers\etc\hosts, and then click Open
  3. On the first line of the HOSTS file, type: 127.0.0.1 localhost as in the following example after modifying a default 'hosts' file:


  4. Save the file to the same location you opened it from.
  5. Close Notepad.
 
Follow us