alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Punto Loader Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/klog.php"; endswith; http.request_body; pcre:"/^[\x20-\x7e\r\n]{0,13}[^\x20-\x7e\r\n]/si"; http.accept; content:"text|2f|html|3b|q=0|2e|7|2c 20 2a 2f 2a 3b|q=1"; http.header_names; content:!"Referer"; classtype:command-and-control; sid:2026945; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_02_19, deployment Perimeter, malware_family Punto, performance_impact Low, confidence Medium, signature_severity Major, tag Loader, updated_at 2020_09_16;)