This is a dangerous memory resident encrypted parasitic viruses. It hooks INT 21h and writes itself at the end of EXE-files are accessed. On November, 1st it overwrites the hard drive sectors with the strings:
! MAYBE ONE DAY WE BE UNITED ! then it plays the tune, displays the US national flag and the message:
!!! MY NAME IS DISKDELIVER * THIS IS ONLY BEGIN * I BE BACK !!! It also contains the internal string:
""" CREATED BY BLUE SHARK - FINISHED 7.VIII.1994 15:30 - CIESZYN POLAND """
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Virus.DOS.Deliver.BlueShark.1771 or BlueShark is a virus that runs on MS-DOS. BlueShark is a...