This virus adds 1-16 extra bytes to programs before it infects them. If it infects a very small file, it can sometimes not be removed. Two variants, 789 and 801 bytes long are known. The virus activates on September 18th, after 7:00 AM, overwriting the hard disk.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.
You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.
Probably an older variant - only able to infect EXE files.