These are not dangerous memory resident parasitic viruses. They hook INT 9, 21h and write themselves to the end of EXE files that are executed or loaded into the memory as overlays. The viruses display:
TABULERO
They also contain the text strings:
"Tabulero.2048.a": IUPLCM Wilmer
"Tabulero.2048.a": ODALUBAT atse CP us, otreum ah LEMRAC
--IUP LUIS CABALLERO MEJIAS--Wilmer 86-
ISRAEL
