Found index.php in files folder and all its subfolders? Anyone know what type of exploit is this? I'm cleaning up my drupal installations and i found in the files folder there was an index.php file and all its subfolders. 
screenshot: 


I still dont know what kind of exploit was done to get all these files in here. Anyone had something similar or know what this is?
Just an additional note, this looks like it could have been caused by the FCKEditor / CKEditor arbitrary file upload bug.

If using one of those WYSIWYGs, check this advisory:

http://drupal.org/node/1482528

and upgrade to latest