alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RCtrl Backdoor CnC Checkin M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/infos/p"; bsize:8; fast_pattern; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a|"; reference:md5,373224fd766cb9b85e3d42d56d1702f3; reference:url,www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/eagle-eye-is-back-apt30/; classtype:command-and-control; sid:2030398; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_06_25, deployment Perimeter, malware_family APT30, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_25;)