This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.
Indication of Infection
BURST command will display a message in chinese.
Presence of the above mentioned behavior
Methods of Infection
Infected "acad.lsp" file.
It automatically infects "acad.lsp" and “acad.mnl” files in the compromised machine.
ACAD/Bursted, ALS.Bursted.A (NAV)