It's a not dangerous memory resident parasitic virus. It hooks INT 21h and writes itself at the end of .COM- and .EXE-files are executed. Depending on the system date it flips the screen, decrypts and displays the messages and reboots computer:
* * * VY ZIRATE MY ZIRAME !!! * * *
Sorry, ale zbal to !
* Ms slizkej Hrd, nemm ho rd, zkus to tak brt Baby *
A nyn¡ nekolik pozdravu :
FUCK OFF AMIGA ! FUCK OFF ATARI ST ! FUCK OFF O.K.!
>> PRESS ANY KEY TO CONTINUE <<
