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  3. W32.Ackantta.C@mm


Risk Level 2: Low

June 12, 2009
June 15, 2009 1:32:46 PM
Also Known As:
W32.Jessinv [Symantec], W32/Autorun-AKG [Sophos]
Infection Length:
557,096 bytes
Systems Affected:
Windows 2000, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
W32.Ackantta.C@mm is a mass-mailing worm that spreads through file-sharing programs and sends spam email that contains links to malicious files.

Note: Virus definitions dated June 15, 2009 or earlier detect this threat as W32.Jessinv.

For more information, please see the following resources:

Antivirus Protection Dates

  • Initial Rapid Release version June 12, 2009 revision 020
  • Latest Rapid Release version February 19, 2013 revision 016
  • Initial Daily Certified version June 12, 2009 revision 021
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date June 17, 2009
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: May download more files on to the compromised computer.
  • Large Scale E-mailing: Sends email spam with links to malicious files.
  • Deletes Files: Deletes certain files on the compromised computer.


  • Distribution Level: Medium
  • Subject of Email: You have received A Hallmark E-Card!, Your friend invited you to twitter!, Jessica would like to be your friend on hi5!, Shipping update for your Amazon.com order 254-78546325-658742
  • Name of Attachment: Postcard.zip
    Invitation Card.zip
    Shipping documents.zip
  • Shared Drives: Spreads through file-sharing programs
Writeup By: Hatsuho Honda and Fergal Ladley

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