Sadly, this plugin has not lived up to expectations. To be truly useful a script of this type requires monthly updates (but last update was in 2010?).
I do not recommend this script. You would be better serviced in looking at the actively developed malware plugins with high ratings, like:
- Bulletproof Security
And monitoring scripts like:
- File Monitor Plus
That said, I'm all for supporting a good malware checking and monitoring scripts, though installing any plugin more than a year old is probably not a very good security practice IMHO.