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F-Secure Virus Information Pages: Xtac
[Summary] | [Detailed Description]

Name : Xtac
Type:Virus
Category:Virus
Platform:DOS
Radar

Summary
Xtac stays resident in memory and infects COM and EXE files when they are executed. COMMAND.COM is infected by overwriting an unused area.
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Detailed Description

Sometimes the virus deletes files with the following extensions:

  • COM
  • EXE
  • SYS
  • BAT
  • OBJ
  • OVR
  • OVL
  • INI
  • CFG
  • TPU
  • HLP
  • TPL
  • BGI
  • CHR

Xtac contains the following unencrypted internal text:

good news! you have justbeen smitten by XTAC - lyndon siao, usc-tc

Xtac was reported to be in the wild in the USA in January 1996.
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Last Modified: January 01, 2006