alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE LYCEUM MSIL/DanBot CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?id="; http.header; content:"Accept-Enconding|3a 20|gzip,deflate"; fast_pattern; http.user_agent; content:"|28|Windows|20|NT|20|10.0|3b 20|&|29|"; reference:md5,9df776b9933fbf95e3d462e04729d074; classtype:command-and-control; sid:2027921; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_28, deployment Perimeter, malware_family DanBot, performance_impact Low, confidence High, signature_severity Major, tag LYCEUM, updated_at 2020_09_01;)