Please help: How do i stop a recurring virus (.jnana/ofex.exe) trying to infect my mac

Can any offer me a solution to a fast becoming major problem.

I have a MacG5 10.5.8 running Norton AntiVirus 11.1..1

 

I've suddenly started getting a virus attack that is quarantined by Norton (details /private/var/root/.jnana/ifex.exe).

 

The attack tries to load several files (normal around 9) to a folder /private/var/root/.jnana.

 

The happens every few minutes which is getting quite tiresome.

Can anyone offer me any advice. :)

 

I've already tried making all folders visible via the terminal, finding the jnana folder and deleting it, but is hasn't helped.

 

thank you

Ed