alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY XenArmor Password Recovery License Check"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/xen-check-portable-license.php?key="; fast_pattern; http.user_agent; content:"Software License Checker"; bsize:24; http.header_names; content:!"Referer"; classtype:policy-violation; sid:2030616; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_30, deployment Perimeter, confidence High, signature_severity Minor, updated_at 2020_07_30;)