Trojan attacks

Not sure if this is the right forum but I thought I should post this somewhere on the forums. During the course of a regular back up to my local PC, Norton blocked 2 files as it felt that these files contained Trojan viruses. Both files sitemaps.php and template_rss.php were found in the public_html folder outside the wordpress folder but looking as if they were regular WP files. Maybe as a precaution it would be worth all having a look at their set-ups. Both files were dated 22/03/2012