ET MALWARE Suspected APT42/TA453 TAMECAT Loader Related Activity (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected APT42/TA453 TAMECAT Loader Related Activity (POST)";
    flow:established,to_server;
    urilen:<10;
    http.method;
    content:"POST";
    http.uri;
    content:!"|2e|";
    http.user_agent;
    content:"curl/"; startswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    http.content_type; bsize:33;
    content:"application/x-www-form-urlencoded";
    http.request_body;
    content:"1="; depth:3; fast_pattern;
    content:"&"; distance:0;
    content:"F1="; distance:1; within:3;
    content:"&"; distance:0;
    content:"F1="; distance:1; within:3;
    reference:md5,d7bf138d1aa2b70d6204a2f3c3bc72a7;
    reference:url,cloud.google.com/blog/topics/threat-intelligence/untangling-iran-apt42-operations;
    classtype:trojan-activity;
    sid:2052412; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_05_06, deployment Perimeter, malware_family TA453, malware_family APT42, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_06;
    target:src_ip;
)