YZ.1230
Description YZ.1230
It is a very dangerous memory resident parasitic virus. It hooks INT 1Ch, 21h and writes itself to the end of COM and EXE files that are executed. On March 8th at 15:00 it erases the disk sectors and displays:
It is my birthday!!!
The virus also contains the ID word:
YZ
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Ostap.322
Description Ostap.322
It is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed or opened. It contains text strings in Russian.
Otti Family
Description Otti Family
These are very dangerous nonmemory resident encrypted parasitic viruses. They search for .COM files and write themselves to the end of the file. Depending on the system date they erase the hard drive sectors. The viruses contain the text string:
OTTI FOREVER
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