alert tcp $HOME_NET any -> [208.8.81.0/24,64.68.96.0/19] $HTTP_PORTS (msg:"ET DELETED MyWebEx Installation"; flow:to_server,established; content:"/pc/r.php?AT=RS"; nocase; threshold:type limit, track by_src, count 1, seconds 30; reference:url,www.mywebexpc.com; classtype:policy-violation; sid:2001713; rev:7; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)