alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Villain C2 Framework HTTP Command Response"; flow:established,to_server; http.method; content:"POST"; http.uri; pcre:"/^\/[a-f0-9]{8}$/"; http.header_names; to_lowercase; content:"|0d 0a|authorization|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; http.header; pcre:"/^Authorization\x3a\x20(?:[a-f0-9]{8}-){2}[a-f0-9]{8}[\r\n]+$/m"; http.user_agent; content:"WindowsPowerShell/"; fast_pattern; http.request_body; pcre:"/^(?:\d{1,3}\x20){10}/P"; classtype:trojan-activity; sid:2042663; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_12_12, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_20;)