1. Symantec/
  2. Security Response/
  3. W32.Holcas.A@mm


Risk Level 2: Low

February 27, 2005
February 13, 2007 12:34:18 PM
Also Known As:
W32/Eudor.worm [McAfee], W32/Jupir-B [Sophos], WORM_HOLCAS.A [Trend Micro]
Systems Affected:

W32.Holcas.A@mm is a mass-mailing worm that uses MAPI commands to send itself to all addresses found in the Windows Address Book. It also attempts to send itself via IRC.

The email has the following characteristics:

Subject: hola como estas, ;o)
Attachment: Que_entretenido.exe

Antivirus Protection Dates

  • Initial Rapid Release version February 28, 2005
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 28, 2005
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date March 2, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Rodney Andres

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
  • Twitter
  • Facebook
  • LinkedIn
  • Google+
  • YouTube