alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Turla APT/Kazuar Backdoor CnC Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.cookie; bsize:59; content:"AspNet.Cookies=MTY5NzM5ZTcyMTEyOTUxNDZhNjFkMzAwYzBmZWYwMmQ="; fast_pattern; http.request_body; content:"|3c|"; startswith; content:"|3e 3c|"; reference:url,community.emergingthreats.net/t/new-sig-et-trojan-w32-kazuar-backdoor-turla-apt-hardcoded-cookie/1136; reference:url,unit42.paloaltonetworks.com/pensive-ursa-uses-upgraded-kazuar-backdoor; classtype:trojan-activity; sid:2049264; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_20, deployment Perimeter, confidence High, signature_severity Critical, tag Turla, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_14;)