alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JS/GootLoader Activity M2 (GET)"; flow:established,to_server; urilen:11; http.method; content:"GET"; http.uri; content:"/xmlrpc.php"; fast_pattern; http.header_names; content:!"Referer"; http.cookie; pcre:"/^[A-Za-z0-9/=+\x3b\x20]{1000,}$/"; reference:md5,88c6ced73d12d490a0fd10c6eac5aa6f; reference:url,securityintelligence.com/x-force/gootbot-gootloaders-new-approach-to-post-exploitation/; classtype:trojan-activity; sid:2050897; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_02_16, deployment Perimeter, deployment SSLDecrypt, malware_family JS_GootLoader, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_16; target:src_ip;)