alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RubySleet APT TrollAgent CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/index.php"; http.user_agent; content:"Go-http-client/"; startswith; http.request_body; content:"a=3e53u2ZVzADd7ne7WWL7N"; fast_pattern; startswith; reference:url,mp.weixin.qq.com/s?__biz=MzI2MDc2MDA4OA==&mid=2247509476&idx=1&sn=b0e09436095203b75710836d718d6699; classtype:trojan-activity; sid:2050692; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2024_02_02, deployment Perimeter, malware_family TrollAgent, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_02_02; target:dest_ip;)