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  3. Backdoor.Rustock.B


Risk Level 1: Very Low

July 5, 2006
February 13, 2007 12:57:18 PM
Also Known As:
Spam-Mailbot.c [McAfee]
Trojan Horse
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Backdoor.Rustock.B is a back door Trojan horse that allows a compromised computer to be used as a covert proxy. It uses advanced rootkit techniques to hide any files and registry subkeys it creates.

Antivirus Protection Dates

  • Initial Rapid Release version July 5, 2006
  • Latest Rapid Release version April 15, 2015 revision 051
  • Initial Daily Certified version July 5, 2006
  • Latest Daily Certified version April 16, 2015 revision 001
  • Initial Weekly Certified release date July 5, 2006
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


  • 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: Elia Florio

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