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  3. W32.Ackantta.H@mm


Risk Level 2: Low

October 6, 2010
October 6, 2010 2:52:01 PM
Infection Length:
323,584 bytes
Systems Affected:
Windows 2000, Windows 7, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
W32.Ackantta.H@mm is a worm that spreads by sending itself to email addresses gathered from the compromised computer.

W32.Ackantta.H may infect certain files with .exe and .msi extensions. The infected files are self-extracting cabinet files that contain legitimate files, and a copy of W32.Ackantta.H@mm. These infected files are detected as W32.Ackannta!dr.

For more information, please see the following resource:
Blog entries on W32.Ackantta

Antivirus Protection Dates

  • Initial Rapid Release version October 5, 2010 revision 032
  • Latest Rapid Release version February 19, 2013 revision 016
  • Initial Daily Certified version October 5, 2010 revision 039
  • Latest Daily Certified version May 15, 2012 revision 004
  • Initial Weekly Certified release date October 6, 2010
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: Gathers email addresses from the compromised computer.
  • Large Scale E-mailing: Sends itself to email addresses gathered from the compromised computer.
  • Deletes Files: Attempts to delete files related to certain security-related software.
  • Modifies Files: Overwrites files that contain predetermined strings.


  • Distribution Level: Medium
  • Subject of Email: Varies.
  • Name of Attachment: Varies.
  • Shared Drives: Spreads through removable and shared drives.
Writeup By: Piotr Krysiuk

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