Worm:OSX/Inqtana.A is a Java based proof of concept bluetooth worm that affects OSX 10.4 (Tiger) systems that have not been patched against vulnerability CAN-2005-1333.
Inqtana.A 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.
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Inqtana.A arrives to victim system as OBEX Push request, requiring user to accept the data transfer. When the transfer is done Inqtana.A uses directory traversal exploit to copy it's files so that it starts automatically on next reboot.
On reboot the Inqtana.A will activate and look for devices that accept OBEX Push transfers and try to send itself to those devices.
OSX/Inqtana.A affects only Mac OSX 10.4, if you use 10.4 make sure that you have installed latest OS updates from Apple.
When Inqtana.A replicates over bluetooth it tries to send three files to any device it finds over bluetooth that supports OBEX push:
The files are pushed with three separate OBEX Push requests which user has to accept, if user accepts the push requests the files copied to special locations using CAN-2005-1333 directory traversal exploit.
The files com.openbundle.plist and com.pwned.plist are dropped into location from where they are called during system startup. The openbundle.plist will unpack the worm components and com.pwned.plist executes the worm main binary.