alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected DPRK APT Related Activity (GET)"; flow:established,to_server; urilen:>40; http.method; content:"GET"; http.uri; content:".php?query=1"; endswith; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; http.host; content:".kr"; endswith; http.user_agent; content:!"Linux|3b 20|"; reference:url,twitter.com/500mk500/status/1648604685341716480; reference:md5,433a2a49a84545f23a038f3584f28b4a; classtype:trojan-activity; sid:2045182; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_04_25, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_25; target:src_ip;)