alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET SCAN Xenu Link Sleuth Scanner Outbound"; flow:to_server,established; http.method; content:"GET"; http.user_agent; content:"Xenu Link Sleuth"; fast_pattern; classtype:attempted-recon; sid:2021058; rev:5; metadata:created_at 2015_05_05, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_30;)