alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT43 GOLDDRAGON Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?filename="; fast_pattern; pcre:"/^[A-F0-9]{8}-[A-F0-9]{8}-[A-F0-9]{8}-[A-F0-9]{8}$/R"; http.user_agent; content:"Mozilla/5.0"; bsize:11; http.header_names; content:!"Referer|0d 0a|"; reference:md5,15ec5c7125e6c74f740d6fc3376c130d; reference:url,mandiant.widen.net/s/zvmfw5fnjs/apt43-report; classtype:trojan-activity; sid:2044851; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_03_31, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_31; target:src_ip;)