It's a harmless memory resident boot virus. It hooks INT 13h and writes itself to MBRs of hard drives and boot sectors of floppy disks. It contains text strings:
THIS PROGRAM WAS WRITTEN IN INDIA.(c)1993 FAT AVENGER PS. this program is not meant to be destructive
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
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