1. Symantec/
  2. Security Response/
  3. W32.Lecna.A


Risk Level 2: Low

May 31, 2006
February 13, 2007 12:55:59 PM
Systems Affected:

W32.Lecna.A is a worm that spreads by exploiting the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011). The worm opens a back door, downloads remote files, and uses a rootkit to hide its presence on the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version May 31, 2006
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version May 31, 2006
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date May 31, 2006
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Costin Ionescu

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2016 Internet Security Threat Report, Volume 21
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