ErrorMem.1994
Description ErrorMem.1994
It is a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed or opened. It does not infect the files: SCAN.EXE, TBSCAN.EXE, TBAV.EXE, MSAV.EXE. Depending on its internal counter the virus displays the message and halts the computer:
Error, memory 1F8E:07A2 hardware internal all
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Prague.604
Description Prague.604
It is a dangerous memory resident parasitic virus. It hooks INT 13h, 21h and writes itself to the end of COM files that are executed. Depending on the system time is cancels the disk access and several DOS functions.
Praios.747
Description Praios.747
It is not a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are searched or accessed. On installing into the memory the virus uses anti-debug tricks. The virus contains the text string:
[Praios 2.0] by Slavemaster 1997/Germany
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