alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Wifi Geolocation Lookup Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/geolocation/wifi"; startswith; fast_pattern; content:"bssid="; http.host; content:"api.mylnikov.org"; bsize:16; reference:md5,1bad0cbd09b05a21157d8255dc801778; classtype:policy-violation; sid:2033011; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_05_21, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_21;)