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  3. W32.Sality.AM


Risk Level 2: Low

April 18, 2009
April 19, 2009 10:49:10 AM
Infection Length:
69,632 bytes
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
W32.Sality.AM is a worm that spreads by infecting executable files and copying itself to removable drives.

For more information, please see the following resources:

Antivirus Protection Dates

  • Initial Rapid Release version April 18, 2009 revision 020
  • Latest Rapid Release version February 19, 2013 revision 016
  • Initial Daily Certified version April 18, 2009 revision 022
  • Latest Daily Certified version April 11, 2011 revision 021
  • Initial Weekly Certified release date April 22, 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: High
  • Payload: Downloads additional files onto the computer.
  • Deletes Files: Deletes files with .vdb, .avc and .key in the filename and also files listed under certain registry subkeys.
  • Modifies Files: Infects executable files.
  • Compromises Security Settings: Ends processes and lowers security settings by modifying the registry.


  • Distribution Level: Medium
  • Shared Drives: Attempts to infect files on network resources and copies itself to removable drives.
  • Target of Infection: Infects executable files.
Writeup By: Piotr Krysiuk and Kaoru Hayashi

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