Threat Description

Xtac

Details

Aliases: Xtac, Xtac
Category: Malware
Type: Virus
Platform: DOS

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.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



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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