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Published Dec 13, 2010 | Updated Sep 15, 2017

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Worm:Win32/Nujama.A

Detected by Microsoft Defender Antivirus

Aliases: Win32/Lebreat.worm.42611 (AhnLab) Net-Worm.Win32.Lebreat.o (Kaspersky) W32/Packed_Mew.C (Norman) Trojan horse Generic5.BWU (AVG) TR/Crypt.MWPM.Gen (Avira) Gen:Trojan.Heur.giWerPcH7Diib (BitDefender) Win32/Nujama.B (CA) Email-Worm.Win32.VB (Ikarus) Generic.dx!spq (McAfee) Trj/Destroyer.B (Panda) Trojan.Win32.Nujama.a (Rising AV) Mal/VB-GI (Sophos) Trojan.Win32.Generic.pak!cobra (Sunbelt Software) W32.Nujama.B (Symantec)

Summary

Worm:Win32/Nujama.A is a worm that modifies system settings and spreads via all available shares.

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/.

Additional remediation instructions for Worm:Win32/Nujama.A

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:

Restoring your System Registry:

For Windows 7: http://windows.microsoft.com/en-us/windows7/Back-up-the-registry
For Windows Vista: http://windows.microsoft.com/en-US/windows-vista/Back-up-the-registry
For Windows XP: http://support.microsoft.com/kb/322756/

Resetting System Security Settings to default:

For Windows XP and Vista: http://support.microsoft.com/kb/313222

Changing file associations:

For Windows 7: http://windows.microsoft.com/en-US/windows7/Change-the-program-that-opens-a-type-of-file
For Windows Vista: http://windows.microsoft.com/en-US/windows-vista/Change-the-program-that-opens-a-type-of-file
For Windows XP: http://support.microsoft.com/kb/307859

Enabling Task Manager:

For Windows Vista: http://windows.microsoft.com/en-us/windows-vista/Troubleshoot-Task-Manager-problems
For Windows XP: http://support.microsoft.com/kb/913623/

Enabling System Restore:

For Windows 7: http://windows.microsoft.com/en-us/windows7/What-is-System-Restore
For Windows Vista: http://windows.microsoft.com/en-us/windows-vista/What-is-System-Restore
For Windows XP: http://support.microsoft.com/kb/310405

Enabling Windows Firewall:

For Windows 7: http://windows.microsoft.com/en-US/windows7/Turn-Windows-Firewall-on-or-off
For Windows Vista: http://windows.microsoft.com/en-US/windows-vista/Turn-Windows-Firewall-on-or-off
For Windows XP: http://support.microsoft.com/kb/283673

Enabling Windows Security Center/Action Center alerts:

For Windows 7: http://windows.microsoft.com/en-us/windows7/What-happened-to-Windows-Security-Center
For Windows Vista: http://windows.microsoft.com/en-US/windows-vista/Using-Windows-Security-Center
For Windows XP: http://support.microsoft.com/kb/889737