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Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.


Threat LevelLow threatDamageHighDistributionNot widespread
Common name:FlySky.AH
Technical name:W32/FlySky.AH.worm
Threat level:Medium
Effects:   It spreads and affects other computers. It uses stealth techniques to avoid being detected by the user. It spreads , across the Internet, via mapped drives, through shared network resources.
Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Aug. 25, 2009
Detection updated on:Jan. 19, 2010

Brief Description 


FlySky.AH is a worm that spreads by copying itself, without infecting other files.


It uses stealth techniques to avoid being detected by the user:

  • It uses techniques included in its code to hide itself while it is active.


FlySky.AH uses the following propagation or distribution methods:

  • Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
  • Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.
  • Computer networks (mapped drives): it creates copies of itself in mapped drives.
  • Computer networks (shared resources): it creates copies of itself in shared network resources to which it has access.