These are not dangerous memory resident parasitic viruses. They hook INT 8, 21h and write themselves to the end of COM files that are executed or opened. When the AIDSTEST anti-virus is executed, the viruses display one the messages and halt the system:
Abnormal program termination
?KMON-F-System read failure halt 177640
Unrecognised error. DMA failure.
Depending on the system date and their counters the virus blink the screen or display messages in Russian. The viruses also contain the text strings:
"Foma.972": STIN V:1.02
"Foma.1000": STIN V:1.01
"Foma.1200": STIN V:1.00
( CGA/EGA/VGA Terminal Color Invertor ) 11-Nov-1991.
Kpy ¼ «p á½ ¡¿ á¼ ¿ ¡Ñ ½áí ¼ ¿ «ó¿ á¼ »« ó áÑ all.....
"Foma.1733": FOMA V:1.01
"Foma.1900": FOMA V:1.00
