alert http [$HOME_NET,$HTTP_SERVERS] any -> any any (msg:"ET RETIRED IIS-Raid Module Backdoor - Successful PING in HTTP Response (PONG)"; flow:established,to_client; flowbits:isset,ET.IIS-Raid.PING; http.stat_code; content:"200"; http.header; content:"|3a 20|UElORw==|0d 0a|"; fast_pattern; reference:url,github.com/0x09AL/IIS-Raid; classtype:trojan-activity; sid:2046175; rev:2; metadata:attack_target Web_Server, created_at 2023_06_09, deployment Perimeter, deployment Internal, deployment SSLDecrypt, former_category MALWARE, malware_family IIS_Raid, performance_impact Low, confidence High, signature_severity Critical, updated_at 2025_05_19; target:src_ip;)