alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SERVER Insomnia Shell HTTP Request"; flow:to_server,established; http.method; content:"POST"; http.uri; content:".aspx"; http.request_body; content:"txtRemoteHost="; fast_pattern; content:"txtRemotePort="; distance:0; content:"txtBindPort="; distance:0; content:"txtPipeName="; distance:0; reference:url,www.insomniasec.com/releases; classtype:trojan-activity; sid:2019899; rev:3; metadata:created_at 2014_12_09, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_14;)