Bauhaus.974
Description Bauhaus.974
It is not a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the beginning of .COM files that are executed. While installing memory resident the virus also infects the C:DOSKEYB.COM file. The virus deletes anti-virus data files CHKLIST.*. On 12th of any month it displays the message:
BAUHAUS est vivo
On 28th of any month it also hooks INT 15h and changes register AL value on some INT 15h calls.
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Mao.1000
Description Mao.1000
This is a harmless virus. It hooks INT 21h, and writes itself to the end of COM files that are executed. It does not run itself in any way.
Mao.1465
Description Mao.1465
This is a benign memory resident parasitic partly encrypted virus. It hooks INT 1Ch and 21h, and writes itself to the end of COM and EXE files that are executed. The virus also infects files upon the summoning of DOS functions FindFirst/Next FCB (DIR command). On September 9th (the day of Mao Tse Tung's death), and on December 26th (his birthday), the virus plays two Chinese tunes.
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