alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/SandCat CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"u_id="; depth:5; content:"&username="; content:"&computername="; content:"&arch="; content:"&os=Microsoft Windows|20|"; content:"&local_ip_address="; content:"&global_ip_address="; fast_pattern; http.header_names; content:!"Referer"; reference:md5,fe5338aee73b3aae375d7192067dc5c8; classtype:command-and-control; sid:2029643; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_17, deployment Perimeter, deployment SSLDecrypt, malware_family SandCat, confidence High, signature_severity Major, updated_at 2020_03_17;)