ET RETIRED Win32/Fynloski.AA CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Win32/Fynloski.AA CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/ok?hw="; fast_pattern; startswith;
    content:"uuid={";
    pcre:"/^[A-F0-9]{8}-(?:[A-F0-9]{4}-){3}[A-F0-9]{12}\}/R";
    content:"ver=";
    content:"name=";
    content:"system=";
    content:"sysdate=";
    content:"act=";
    content:"str1=";
    content:"str2=";
    content:"str3=";
    http.header_names;
    content:!"Referer";
    content:"User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|";
    reference:md5,082ba31c83e3fc1114b6444111e88019;
    classtype:trojan-activity;
    sid:2037234; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_30, deployment Perimeter, former_category MALWARE, malware_family Win32_Fynloski_AA, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;
)