This plugin acts as a tripwire for you. It will give you a list of all files changed on your WordPress site in the last 1-99 days.
This is part 2 of a 3 part security suite for WordPress. This plugin acts as a tripwire, flagging all files that have been changed in the last 1 to 99 days. Simply choose how many days back in time you wish to go and and it will list all files changed in that time frame for you.