Attention: We have transitioned to a new AAD or Microsoft Entra ID from the week of May 20, 2024. In case your tenant requires admin consent, please refer to this document located at Overview of user and admin consent - Microsoft Entra ID | Microsoft Learn and grant access to App ID: 6ba09155-cb24-475b-b24f-b4e28fc74365 with graph permissions for Directory.Read.All and User.Read for continued access. While the app may appear unverified, you can confirm its legitimacy by verifying the App ID provided.
We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
Worm:VBS/Autorun.BG
Detected by Microsoft Defender Antivirus
Aliases: VBS/AutoRun.AM (Command) Worm.VBS.Autorun.hu (Kaspersky) W32/Autorun-AWI (Sophos) VBS.Runauto (Symantec)
Summary
Worm:VBS/Autorun.BG is a worm that spreads via fixed, removable and network drives, and RAM disks. It changes the user’s Internet Explorer start page, and attempts to enable Autorun functionality on all drives of the computer. In certain situations it may also attempt to shut down the computer.
To detect and remove this threat and other malicious software that may be installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following:
For more information on antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.
Recovering from recurring infections on a network
The following additional steps may need to be taken to completely remove this threat from an infected network, and to stop infections from recurring from this and other similar types of network-spreading malware:
- Ensure that an antivirus product is installed on ALL computers connected to the network that can access or host shares.
- Ensure that all available network shares are scanned with an up-to-date antivirus product.
- Restrict permissions as appropriate for network shares on your network. For more information on simple access control, please see: http://technet.microsoft.com/library/bb456977.aspx.
- Remove any unnecessary network shares or mapped drives.
Note: Additionally it may be necessary to temporarily change the permission on network shares to read-only until the disinfection process is complete.
Additional remediation instructions for Worm:VBS/Autorun.BG
This threat may make lasting changes to a computer’s configuration that are NOT restored by detecting and removing this threat. For more information on returning an infected computer to its pre-infected state, please see the following article/s:
- Changing your Internet Explorer Home Page:
- For Windows 7: http://windows.microsoft.com/en-us/windows7/Change-your-Internet-Explorer-home-page
- For Internet Explorer 7 and 8 in Windows Vista: http://windows.microsoft.com/en-US/windows-vista/Change-your-Internet-Explorer-home-page
- For Internet Explorer 6: http://support.microsoft.com/kb/252464
- Correctly disabling Autorun in Windows: http://support.microsoft.com/kb/953252
- For other support and help related articles, go to:
- Windows 7: http://support.microsoft.com/gp/windows7
- Windows Vista: http://support.microsoft.com/ph/11732
- Windows XP: http://support.microsoft.com/ph/1173
- Microsoft Security TechNet Center: http://technet.microsoft.com/security/default.aspx
Follow us
