alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SunSeed Lua Downloader Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; pcre:"/^\/[0-9]{9,10}$/"; http.header_names; content:"|0d 0a|host|0d 0a|te|0d 0a|connection|0d 0a|user-agent|0d 0a 0d 0a|"; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; http.user_agent; content:"LuaSocket|20|"; fast_pattern; startswith; classtype:trojan-activity; sid:2035360; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_02_28, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_04;)