It is not a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed. While installing memory resident the virus also infects the C:COMMAND.COM file. On January 21th the virus decrypts and displays the message:
Virus GISELA 2.0 By EJECUTOR (Hecho en Argentina)
Feliz cumpleaņos Gisela.
