alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/CopperStealer CnC Activity"; flow:established,to_server; http.method; content:"GET"; urilen:>175; http.uri; content:".php?info=MzE4TZT-"; fast_pattern; http.accept_lang; content:"ko-KR,ko|3b|"; startswith; http.header; content:"upgrade-insecure-requests|3a 20|1|0d 0a|"; http.header_names; content:!"Referer"; reference:md5,12e9b4bbe894ab0bf357182a11d4c535; classtype:command-and-control; sid:2031916; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_14, deployment Perimeter, malware_family Win32_CopperStealer, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_11_14;)