Blinker.512
Description Blinker.512
It's a memory resident not dangerous virus which hooks INT 8, 21h and by standard way infects COM-files that are started. Sometimes it "plays" with the display adapter. It also contains the text "Blinker".
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I_Owe.261
Description I_Owe.261
It is a dangerous memory resident parasitic virus. It infects only the IO.SYS file. While infecting the virus scans the header of IO.SYS for the area that contains only the zero bytes, and writes itself into there, if such area exist.
While loading from infected system the virus copies itself into the video memory, hooks INT 1Ah, waits for DOS loading, then it hooks INT 21h and overwrites C:IO.SYS on first call to DOS functions. Then the virus removes itself from the memory.
The infection method is very unusual one, and it may halt the system. The virus can spread only while loading from infected floppy disk, and it infects only IO.SYS on C: drive. The virus contains the text strings:
C:IO.SYS
I OWE
-=Q=-
I_Was_Here.710
Description I_Was_Here.710
It is a very dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed. On June 28th it erases disk sectors. It contains the text:
I was here ! - JM
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