These are harmless nonmemory resident parasitic viruses, "Ahav.377,383" are encrypted. They search for COM files and write themselves to the end of the file. They contain the text string:
"Ahav.336,337": [AHaV] DHA 9/2/95 77
"Ahav.377,379,383,385": [AHaV] Gothmog/DHA *.COM
