ET MALWARE Win32/BUGHATCH SpawnAgent Request (GET) M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/BUGHATCH SpawnAgent Request (GET) M1";
    flow:to_server,established;
    urilen:12;
    http.method;
    content:"GET";
    http.uri;
    content:"/Agent64.bin"; fast_pattern;
    http.user_agent;
    content:"Mozilla|2f|"; startswith;
    http.host;
    pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/";
    pcre:"/^(4|5)\.0$/R";
    reference:url,businessinsights.bitdefender.com/technical-advisory-proxyhell-exploit-chains-in-the-wild;
    reference:url,elastic.co/security-labs/bughatch-malware-analysis;
    classtype:trojan-activity;
    sid:2044387; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_02_28, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_BUGHATCH, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_28;
)