alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Neutrino EK Landing URI Format"; flow:established,to_server; content:"GET"; http_method; content:"/a"; depth:2; http_uri; pcre:"/^\/a[a-z]{4,13}\?(hash=[a-f0-9]{32}&)?q[a-z]{4,11}=\d{6,7}$/U"; classtype:exploit-kit; sid:2016975; rev:4; metadata:created_at 2013_06_05, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)