ET MALWARE JS/GootLoader CnC Exfil

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE JS/GootLoader CnC Exfil";
    flow:established,to_server;
    http.uri;
    content:"/xmlrpc.php"; bsize:11; fast_pattern;
    http.user_agent;
    content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|0|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chrome|2f|107|2e|0|2e|0|2e|0|20|Safari|2f|537|2e|36"; bsize:111;
    http.cookie;
    pcre:"/^[0-9A-Z]{10}\x3a\x20/";
    http.header_names;
    content:!"Referer";
    reference:url,esentire.com/blog/gootloader-striking-with-a-new-infection-technique;
    reference:url,twitter.com/GootLoaderSites/status/1594888020058337281;
    classtype:trojan-activity;
    sid:2042541; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_12_09, deployment Perimeter, deployment SSLDecrypt, malware_family JS_GootLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_25, reviewed_at 2025_10_24;
)