alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT28/Sofacy Zebrocy Go Variant CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?id_name="; fast_pattern; http.user_agent; content:"Go-http-client/"; startswith; http.request_body; content:"attach="; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,unit42.paloaltonetworks.com/sofacy-creates-new-go-variant-of-zebrocy-tool; reference:md5,400a162a9e5946be10b9fd7155a9ee48; classtype:targeted-activity; sid:2026752; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_03, deployment Perimeter, malware_family Sofacy, malware_family Zebrocy, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_05_01;)