alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Privdog Checkin"; flow:established,to_server; http.uri; content:"/safecontent.php?"; http.user_agent; content:"Mozilla/5.0 (Windows|3b| U|3b| MSIE 7.0|3b| Windows NT 6.0|3b| en-US)"; fast_pattern; reference:url,blog.hboeck.de/archives/866-PrivDog-wants-to-protect-your-privacy-by-sending-data-home-in-clear-text.html; reference:url,blog.lumension.com/9848/whats-worse-than-superfish-meet-privdog-leaving-users-wide-open-to-attacks/; classtype:policy-violation; sid:2020579; rev:3; metadata:created_at 2015_02_27, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_15;)