Clock
Description Clock
This is a dangerous virus which infects the Boot-sector on floppy disks during access to them and MBR of hard disk on a reboot from an infected floppy. Depending on its internal counter the infector reboots the computer, also changes the setup of the hard disk (not in the CMOS but in the memory of the hard disk controller when it is possible). "Clock" also hooks INT 8, 13h.
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OopsTmp.1087
Description OopsTmp.1087
It is not a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed. It contains the text strings:
OOPsTEMP$$$ OOPsTEMP.$$$ OOPsTEMP$$$
and sometimes displays:
OOPs
Opal Family
Description Opal Family
These are harmless nonmemory resident parasitic viruses. They search for .COM files and write themselves to the end of the file. The viruses contain the text strings:
"Opal.390": *.COM OpalSoft
"Opal.683": *.COM OpalSoft 10.3.1994 v1.2C
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