alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Ttint XORed CnC Checkin"; flow:established,to_server; urilen:1; http.method; content:"GET"; http.connection; content:"Upgrade"; http.request_body; content:"|a1 8a ee 02 e8 91 ff 04 be ac f7 09 b3 9c|"; offset:8; fast_pattern; reference:url,blog.netlab.360.com/ttint-an-iot-rat-uses-two-0-days-to-spread/; classtype:command-and-control; sid:2030924; rev:2; metadata:affected_product IoT, created_at 2020_09_30, deployment Perimeter, malware_family Ttint, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_30;)