ET MALWARE Win32.Agent.Y!c CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32.Agent.Y!c CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/vendas/Cadastra.php?pc="; startswith; fast_pattern;
    content:"&serial="; distance:0;
    http.user_agent;
    content:"Indy Library";
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Accept|0d 0a|Accept-Encoding|0d 0a|User-Agent|0d 0a 0d 0a|"; startswith;
    reference:md5,c0b6cbb039bdbd86dcdfce87d059d1c9;
    classtype:command-and-control;
    sid:2038894; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_16, reviewed_at 2024_12_24;
)