Tongji.1535
Description Tongji.1535
It is not a dangerous memory resident encrypted parasitic virus, it hooks INT 21h. On accessing files and on GetDiskSpace DOS call the virus searches for .EXE files and writes itself to their end. On April 29 the virus displays the message:
Tongji University!
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Phrase.1568
Description Phrase.1568
This is a relatively harmless non-memory resident parasitic encrypted virus. It searches for .COM files, then writes itself to the end of the file. On Tuesdays, the virus plays a tune.
Phx Family
Description Phx Family
These are very dangerous memory resident parasitic viruses. They hook INT 21h and write themselves to the end of COM and EXE files. Several of the viruses contain the text "PHX".
"Phx.823,1015" hook the INT 21h function Open (AX=3D02h) and check the code of program which performs that call. The viruses compares that code with the list of specified masks, and if that code is in the list, "Phx.823" virus resets computer, "Phx.1015" corrupts the data while writing to the files.
"Phx.965,1289,1336" in some cases change one byte of information while writing to disk file.
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Lindgren, Kent
Odos
Jonas Nilsson FastighetsfÖrmedling Ab
Skarp Bygg Och Fastighet
Toefl
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