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  3. Backdoor.Necurs


Risk Level 1: Very Low

December 7, 2012
January 25, 2013 9:13:25 AM
Systems Affected:
Windows 2000, Windows 7, Windows NT, Windows Vista, Windows XP
Backdoor.Necurs is a Trojan horse that opens a back door on the compromised computer. The Trojan may also disable antivirus products as well as download and install additional malware.

Antivirus Protection Dates

  • Initial Rapid Release version December 7, 2012 revision 008
  • Latest Rapid Release version April 30, 2015 revision 019
  • Initial Daily Certified version December 7, 2012 revision 020
  • Latest Daily Certified version April 30, 2015 revision 036
  • Initial Weekly Certified release date December 12, 2012
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Medium
  • Payload: Opens a back door and downloads more malware onto the compromised computer.
  • Compromises Security Settings: Disable antivirus programs.


  • Distribution Level: Low
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Alan Neville

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