Tip.554
Description Tip.554
It is a harmless memory resident parasitic virus. It hooks INT 21h, and on DOS calls Execute, Delete, Create/Remove/Change Directory it searches for .COM files (except COMMAND.COM), then writes itself to the end of the file. The virus contains the text strings:
Virus program message from TIP to YSJ
*.COM COMMAND
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Find.509
Description Find.509
This is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of EXE files on FindFirst and FindNext (AH=4Eh,4Fh) DOS functions calls.
Find.666
Description Find.666
This is a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of EXE files on FindFirst and FindNext (AH=4Eh,4Fh) DOS functions calls.
During installation it overwrites one of the FAT sectors.
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