Summary

KMIT virus installs itself to high DOS memory, decreasing available memory by 8336 bytes. It hooks interrupts 09h (keyboard), 1Ch (timer) and 21h (DOS).

Additional Details

Once the KMIT virus is memory resident, it will infect executed COM and EXE files. File length increase will not be visible as long as the virus is resident. The virus code is located at the beginning of COM programs and at the end of EXE programs.

KMIT will corrupt COMMAND.COM if it infects it. This will result in a continuous series of reboots occurring when the machine is booted up next time.

KMIT contains the following unencrypted text string:

We are PRO Version 1.0 Producted by Mr.Watshira Sae-eu KMIT Date Dec 28,1990 See U Next Version. BIOS SOIB 122819722791
KMIT activates on December the 28th, when it tries to overwrite part of the hard disk.

[Analysis: Mikko Hypponen, F-Secure]