alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE [PTsecurity] Win32/SocStealer.Socelars C2 Response"; flow:established,to_client; http.stat_code; content:"200"; http.header; content:"Server-Key|3a 20|"; pcre:"/[A-Za-z0-9]{62}/R"; file.data; content:"[DATA]"; depth:6; fast_pattern; content:"[DATA]"; endswith; classtype:command-and-control; sid:2025458; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_04_03, deployment Perimeter, deprecation_reason Age, malware_family SocStealer, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_02_13, reviewed_at 2024_02_13;)