alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Spyder Loader CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.header; content:"zte|3a 20|eyJ"; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; http.content_len; byte_test:0,=,0,0,string,dec; reference:url,x.com/jaydinbas/status/1797968559668400536; reference:url,mp.weixin.qq.com/s?__biz=MzI2MDc2MDA4OA==&mid=2247508856&idx=1&sn=256ab2e8e63a406a37088f1b133eb6ff; classtype:trojan-activity; sid:2053269; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_06_05, deployment Perimeter, malware_family Spyder, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_06_05; target:src_ip;)