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.
