Quell.511
Description Quell.511
It is not a dangerous memory resident parasitic virus. It hooks INT 1Ch (system timer), 21h and writes itself to the end of COM files that are executed. The virus INT 1Ch handler each time reads data from CMOS memory - current day and month number, compares them with May 15 and does nothing. It seems that at this day the virus has to run some payload subroutine, but it absents in this virus code.
The virus contains the string:
COMcom
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Freemun.200
Description Freemun.200
It is a harmless nonmemory resident parasitic virus. It searches for COM files, then writes itself to the beginning of the file. The virus does not manifest itself in any way, it contains the text:
*.com 3¼ ¡
Freew
Description Freew
It's very dangerous not memory resident virus which searches for .COM-files (except COMMAND.COM) and writes itself into their beginnings. It contains the text strings: "Freew", ".. *.* *.com COMMAND.MKS_VIR.". It can overwrite the files by a small program which types "Program terminated normally" and returns to DOS.
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