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Int10

Classification

Category:

Malware

Type:

Virus

Aliases:

  • Int10

Summary

Int10 is an unusual boot sector virus. It infects MBRs on hard drives and floppy boot sectors.

Removal

Technical Details

When an infected machine is booted from the hard drive, Int10 removes itself temporarily from the MBR and INT 13h chain in order to hide it's presence. When DOS has been loaded, it reinfects the MBR.

Int10 does not appear to be deliberately malicious. It activates at midnights during December or six hours after the machine has been booted (again, only in December). At this time it displays a graphic snowfall on-screen and halts the machine.

Int10 is encrypted with a simple key.

There are three known variants of this virus.

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