It is a nonmemory resident very dangerous virus. It searches for all .COM files in the current directory and overwrites them. Before return to DOS the virus displays the message: "Program too big to fit in memory". The virus then leaves in the system memory a program that hooks INT 1Ch and in some time displays: "HI!".
The virus depending on the system time tries to format the hard drive, but fails because of a bug. The virus also writes to the C:AUTOEXEC.BAT file commands that delete files:
@del *.com
@del *.exe
@del *.sys
The virus also contains the text "TPS" and encrypted text in Russian.