ET MALWARE Win32/Agent.TWI CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET 5000 (
    msg:"ET MALWARE Win32/Agent.TWI CnC Checkin";
    flow:established,to_server;
    http.request_line;
    content:"GET|20|/msg?msg="; startswith; fast_pattern;
    content:"&token="; distance:0;
    http.referer;
    content:":5000/msg?msg=";
    content:"&token="; distance:0;
    reference:md5,a487ab85983baa856fb089d9d01993fc;
    classtype:command-and-control;
    sid:2037898; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_02, deployment Perimeter, malware_family Win32_Agent_TWI, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_02;
)