NoHook.48
Description NoHook.48
These are very dangerous memory resident overwriting viruses. They copy themselves to the Interrupt Vectors Table, hook INT 85h and patch DOS kernel with INT 85h call. Then they overwrite files that are executed. Major versions of these viruses contain the text:
it's not necessary 2 hook int 21h!
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Tarazona.985
Description Tarazona.985
It is a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed. On October 10 it displays the message and halts the computer:
Tranquilo chico que si no es en septiembre será en Junio :-)
Que los 12 créditos mínimos te acompañen
all..
by nEUrOtIc cPu cOrpOrAtIOn S.A.
The virus also contains the text:
Virus Tarazona_Killer por Nigromante
Tashkent Family
Description Tashkent Family
These are not dangerous nonmemory resident parasitic viruses. They search for .COM files and write themselves to the end of the file. "Tashkent.509" increases the file length by 509+nn bytes where 'nn' is the "generation" of that virus. Depending on the system timer they decrypt and display the messages in Russian. These viruses contain the text string:
*.COM Æá_¬Ñ¡_(æ) 91ú
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