OSX/Inqtana.C is a modified version of OSX/Inqtana.A that has modified startup routine so that it affects both OSX 10.4 and 10.3 that have not been patched against vulnerability CAN-2005-1333.
Inqtana.C has not been met in the wild and has internal counter that prevents it's operation after 24. February 2006. So it is unlikely that this variant would be a threat to Mac Users.
Patch your system by getting updates from AppleDelete following files
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note You need administrative rights to change the settings.
Inqtana.C arrives to victim system as OBEX Push request, requiring user to accept the data transfer. When the transfer is done Inqtana.B uses directory traversal exploit to copy it's files so that it starts when any application is started.