alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SolarSys CnC Activity M1"; flow:established,to_server; http.request_line; content:"POST /login.php "; startswith; http.user_agent; bsize:114; content:"Mozilla/5.0 (Windows NT 6.1|3b 20|Win64|3b 20|x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36"; fast_pattern; http.request_body; content:"id="; nocase; startswith; pcre:"/^[A-F0-9]{128}$/R"; reference:url,blog.360totalsecurity.com/en/secret-stealing-trojan-active-in-brazil-releases-the-new-framework-solarsys/; classtype:command-and-control; sid:2031070; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_10_21, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_25;)