alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Common /mpp/ Phishing URI Structure 2016-02-08"; flow:to_server,established; http.uri; content:"/mpp/"; fast_pattern; pcre:"/(?:\/mpp\/[0-9a-f]{32}\/|\/[0-9a-f]{32}\/mpp\/)/i"; http.header_names; content:!"Referer|0d 0a|"; classtype:social-engineering; sid:2032370; rev:4; metadata:attack_target Client_Endpoint, created_at 2016_02_08, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_08_12;)