Where to replace social icons on the footer?

They are loaded by footer.php and they are an the FTP server here:

wp-content/themes/WildCommunity/_inc/images/social-digg.png
wp-content/themes/WildCommunity/_inc/images/social-facebook.png
wp-content/themes/WildCommunity/_inc/images/social-stumbleupon.png
wp-content/themes/WildCommunity/_inc/images/social-technorati.png
wp-content/themes/WildCommunity/_inc/images/social-twitter.png