alert http $HTTP_SERVERS any -> $EXTERNAL_NET any (msg:"ET WEB_SERVER WebShell ASPXShell - Title"; flow:established,to_client; file_data; content:"<title>"; content:"ASPX Shell"; fast_pattern; nocase; content:"</title>"; distance:0; classtype:trojan-activity; sid:2017183; rev:5; metadata:created_at 2013_07_24, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_19, reviewed_at 2024_02_07;)