December12.1914
Description December12.1914
It is not 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. On December 12th it also hooks INT 1Ch (timer) and in about 30 minutes drops symbols on the screen (see also the "Cascade" virus).
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Nik.442
Description Nik.442
These are memory resident parasitic viruses. They hook INT 1Ch, 21h and write themselves to the beginning of COM files that are executed. The viruses contain the text:
NIK
"Nik.442" is a dangerous virus, depending on its counter it corrupts the CMOS. "Nik.546" slowly turns off the screen by using the VGA features.
Nikki.3133
Description Nikki.3133
It is a harmless memory resident parasitic polymorphic virus. It hooks INT 21h and writes itself to the end of COM and EXE (except COMMAND.COM) files that are executed, opened, renamed or when file attributes are accessed. The virus sets read-only attribute for infected files. The virus does not infect the programs: VIR*, CLEAN, DEBUG, SCAN, NAV. The virus deletes the anti-virus data files CHKLIST.*.
The virus contains the text strings:
TO Nikki Edval ng TorOntCan.FROM Putoksa Kawayan.
Kathang-isip sa Metro Manila, Philippines
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