Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Villain C2 Framework HTTP Server Response"; flow:established,to_client; http.response_line; content:"HTTP/1.0 200 OK"; http.header.raw; content:"Server|3a 20|Apache/2.4.1|20 0d 0a|"; fast_pattern; http.header; content:"Access-Control-Allow-Origin|3a 20|*"; threshold:type limit, seconds 120, count 1, track by_dst; classtype:trojan-activity; sid:2042770; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_12_13, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_13, reviewed_at 2025_07_14;)