alert http any any -> $HOME_NET any (msg:"ET RETIRED TA453 Modified IIS-Raid Backdoor Module Headers in HTTP Request"; flow:established,to_server; http.header; content:"X-Beserver-Verify|3a 20|"; fast_pattern; content:"X-Forward-Verify|3a 20|"; reference:url,www.bitdefender.com/blog/businessinsights/unpacking-bellaciao-a-closer-look-at-irans-latest-malware/; reference:url,github.com/0x09AL/IIS-Raid; classtype:trojan-activity; sid:2045222; rev:2; metadata:affected_product Microsoft_IIS, attack_target Web_Server, created_at 2023_04_27, deployment Perimeter, deployment Internal, deployment SSLDecrypt, former_category MALWARE, malware_family TA453, malware_family IIS_Raid, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_17, reviewed_at 2025_04_17; target:dest_ip;)