alert http $HOME_NET any -> [69.63.176.0/20,69.63.176.0/20,204.15.20.0/22] any (msg:"ET DELETED Facebook URL Redirect Vulnerability"; flow:established,to_server; content:"GET"; nocase; http_method; content:"/track.php?"; nocase; http_uri; content:"r="; nocase; http_uri; reference:url,lists.grok.org.uk/pipermail/full-disclosure/2011-February/079577.html; classtype:trojan-activity; sid:2012402; rev:7; metadata:created_at 2011_03_01, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)