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  3. Trojan.Acdropper.B


Risk Level 1: Very Low

July 27, 2006
February 13, 2007 12:57:58 PM
Trojan Horse
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Trojan.Acdropper.B is a Trojan horse program that drops and executes a copy of Backdoor.Pcclient.B by exploiting the Microsoft Jet Database Engine Malformed Database File Buffer Overflow Vulnerability (as described in Bugtraq ID 12960).

Antivirus Protection Dates

  • Initial Rapid Release version July 27, 2006
  • Latest Rapid Release version August 20, 2008 revision 017
  • Initial Daily Certified version July 27, 2006
  • Latest Daily Certified version August 20, 2008 revision 016
  • Initial Weekly Certified release date August 2, 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: Low


  • 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: Nicolas Falliere

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