This is a simple boot sector virus which spreads on floppies. It infects the DBR of the hard drive instead of MBR.
RSY activates by random and overwrites some data on the hard drive.
Virus contains this text:
F-PROT 2.27 and 2.28 might miss this virus occasionally. If you suspect this, use the DOS version with the /PARANOID switch to double-check.
RSY was reported in the wild in Europe in December 1997.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
More information on scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.