Plutto.602
Description Plutto.602
This is a very dangerous nonmemory resident parasitic virus. it searches for .COM files of the current directory and writes itself to the end of the file. If a .COM file has EXE format, the virus corrupts it. The virus writes the string "pLuTto_B" to the the header of such file (EXE header), and that file is not restorable.
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Jmp.2153
Description Jmp.2153
It is a harmless memory resident encrypted parasitic virus. When executed it creates the temporary .COM file with the decrypted virus body and executes it. That file hooks INT 8 and 21h and stays memory resident. Then it infects COM and EXE files that are executed. The virus contains the text string:
COMMAND.COM SCAN.EXE CTEAMGK.EXE
and does not infect the files that are listed there. This virus also contains the text:
Jmpflag=0
Joan.480
Description Joan.480
It is not a dangerous memory resident parasitic virus. It hooks INT 21h and stays memory resident. On FindFirst FCB calls (DIR command, INT 21h, AH=11h) it searches for SYS files and writes itself to the end of the file. On April 15th it displays the message:
Joan v6.23 by KiKo NoMo
Happy Birthday to you, Joan
KiKo
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