Datacrime.1168.a
Description Datacrime.1168.a
This is a very dangerous nonresident virus. As an infected file is executed, it infects by standard way not more than one COM file in all current directories of all available disks though it does not infect COMMAND.COM. Depending on the timer and its own internal counters, the virus displays the text:
DATACRIME VIRUS RELEASED: 1 MARCH 1989
After that it makes an attempt to format some tracks of the hard disk.
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Piazzolla.874
Description Piazzolla.874
It is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the beginning of .COM files (except COMMAND.COM) that are executed. While infecting it creates the file PIAZZOLL.$$$ and writes into this file its body and then the body of the file, then it deletes original COM file and copies the file PIAZZOLL.$$$ into that file, and then deletes the PIAZZOLL.$$$ file. The virus contains the text strings:
Piazzolla
COMMANDCOM
Piazzoll.$$$
Picket Family
Description Picket Family
These are very dangerous memory resident encrypted parasitic viruses. They hooks INT 21h ("Picket.1034" hooks INT 1Ch also) and write themselves to the end or to the middle of COM files.
While inserting into the middle of the file they search for the data area that contains the constant byte, then store that byte and overwrite that area with the virus copy. That routine contains several errors, and the file size can grow more than 64K while infecting, and the file stays corrupted.
These viruses contain text strings in Russian.
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