alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Agent.AETZ CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.user_agent; content:"Microsoft Internet Explorer"; http.request_body; content:"|7b 22|token|22 3a 20 22|"; startswith; fast_pattern; content:"|22 2c 20 22|installid|22 3a 20 22|"; distance:0; content:"|22 2c 20 22|ver|22 3a 20 22|"; distance:0; content:"|22 2c 20 22|agent|22 3a 20 22|"; distance:0; threshold:type limit, track by_src, seconds 180, count 1; reference:md5,e4ca9c56bb6c3e7d68049ceca5d96f09; classtype:command-and-control; sid:2039616; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_11_01, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Agent_AETZ, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_01;)