alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Koadic RC4 Encrypted Payload Inbound M2"; flow:established,to_client; http.response_body; content:"|f9 0d a6 e9 6a 23 a6 ce 25 e9 89 7a 26 ab e4 1f cf 16 49 e2 b8 36 bb 65 b1 3b a9 40|"; startswith; fast_pattern; reference:md5,2b1aadc3c4eebdd8b4bbd4cbb1fb2468; classtype:trojan-activity; sid:2054104; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_06_27, deployment Perimeter, malware_family Koadic, confidence High, signature_severity Critical, updated_at 2024_06_27;)