alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Bitter APT ZxxZ Downloader CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"profiles.php?profiles="; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,www.secuinfra.com/en/techtalk/whatever-floats-your-boat-bitter-apt-continues-to-target-bangladesh; classtype:trojan-activity; sid:2037718; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_07_07, deployment Perimeter, former_category MALWARE, malware_family ZxxZLoader, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;)