alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ELF/Muhstik Attempting to Download Payload"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?port="; fast_pattern; http.user_agent; content:"wget/"; http.header_names; content:!"Referer"; reference:url,blog.netlab.360.com/gpon-exploit-in-the-wild-i-muhstik-botnet-among-others-en/; classtype:trojan-activity; sid:2025575; rev:3; metadata:affected_product Linux, attack_target Networking_Equipment, created_at 2018_05_11, deployment Perimeter, malware_family Muhstik, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25;)