alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO [eSentire] Possible Kali Linux Updates"; flow:established,to_server; http.method; content:"GET"; http.user_agent; content:"APT-HTTP|2f|"; http.host; content:"kali.org"; fast_pattern; pcre:"/^[a-z0-9.]+\.kali\.org/"; classtype:misc-activity; sid:2025627; rev:5; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2018_06_25, deployment Perimeter, confidence Medium, signature_severity Informational, updated_at 2023_05_02;)