alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED TA421 Wineloader CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api.php"; http.user_agent; content:"Mozilla/5.0|20 28|Windows NT 10.0|3b 20|Win64|3b 20|x64|3b 20|rv|3a|86.1|29 20|Gecko/20100101 Firefox/86.1"; fast_pattern; http.header; content:"Content-Length|3a 20|"; reference:url,www.zscaler.com/blogs/security-research/european-diplomats-targeted-spikedwine-wineloader; classtype:trojan-activity; sid:2051131; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_02_27, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family TA421, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_14, reviewed_at 2025_07_14; target:src_ip;)