These are dangerous memory resident encrypted parasitic viruses. They hook INT 21h and write themselves into the middle of COM and EXE files that are executed or opened.
The viruses are divided into 10 blocks of code. While infection the viruses rearrange these blocks in randomly selected order (see "Badboy" viruses).
On November 11th these viruses delete the files when FindFirst/Next (AH=4Eh,4Fh) DOS calls are performed.
The viruses contain the internal text strings:
"Asmodeous.1160": ASMODEOUS
"Asmodeous.1343,1829,1833": Asmodeous
"Asmodeous.1437,1450": Asmodeous 9C
