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Published Oct 15, 2009 | Updated Sep 15, 2017

Worm:Win32/Neeris.AN

Detected by Microsoft Defender Antivirus

Aliases: Win32/Autorun.worm.32256.D (AhnLab) Worm.Win32.AutoRun.tet (Kaspersky) W32/Smalltroj.IVKD (Norman) W32/SdBot-DKI (Sophos) Win32/AutoRun.Agent.DO (ESET) Win32/IRCBot.EH (CA) W32/Autorun.worm.h (McAfee) Backdoor.Sdbot (Symantec)

Summary

Worm:Win32/Neeris.AN is a worm that spreads by removable drives and by attempting to exploit a number of particular vulnerabilities. The worm also contains backdoor functionality that allows unauthorized access and control of the affected computer.
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 Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.
 
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:
 
  1. Ensure that an antivirus product is installed on ALL machines connected to the network that can access or host shares  (see above for further detail).
  2. Ensure that all available network shares are scanned with an up-to-date antivirus product.
  3. 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.
  4. 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 recovery instructions for Worm:Win32/Neeris.AN
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 article/s: 
Viewing hidden and/or system files:
 
Enabling Windows Firewall:
 
Get the latest computer updates
This worm attempts to exploit several previously addressed vulnerabilities. In order to ensure that your computer is not vulnerable to these exploits, you must download and install the appropriate updates.
 
You can use the Automatic Updates feature in Windows to automatically download future Microsoft security updates while your computer is on and connected to the Internet.
To turn on Automatic Updates in Windows Vista
  1. Click Start, and click Control Panel. 
  2. Click System and Maintainance.
  3. Click Windows Updates.
  4. Select a setting. Microsoft recommends selecting Install updates automatically and choose a time that is convenient for you. If you do not choose Automatic, but you choose to be notified when updates are ready, a notification balloon appears when new downloads are available to install. Click the notification balloon to review and install the updates.
To turn on Automatic Updates in Windows XP
  1. Click Start, and click Control Panel. 
  2. Click System.
  3. Click Automatic Updates.
  4. Select a setting. Microsoft recommends selecting Automatic. If you do not choose Automatic, but you choose to be notified when updates are ready, a notification balloon appears when new downloads are available to install. Click the notification balloon to review and install the updates.
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