alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED Skype VOIP Reporting Install"; flow:to_server,established; content:"/ui/"; nocase; http_uri; content:"/installed"; http_uri; nocase; reference:url,www1.cs.columbia.edu/~library/TR-repository/reports/reports-2004/cucs-039-04.pdf; classtype:policy-violation; sid:2001596; rev:11; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)