alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Observed POST to xsph .ru Domain"; flow:established,to_server; http.method; content:"POST"; http.host; content:".xsph.ru"; endswith; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:bad-unknown; sid:2032531; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2021_04_08, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2024_04_24;)