alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ARM Binary Requested via WGET to Known IoT Malware Domain"; flow:to_server,established; http.method; content:"GET"; http.uri; pcre:"/\.(?:arm(?:5n|7)?|m(?:ips|psl))$/"; http.user_agent; content:"Wget/"; depth:5; http.host; content:"ntp.gtpnet.ir"; startswith; reference:url,blog.netlab.360.com/a-new-threat-an-iot-botnet-scanning-internet-on-port-81-en/; classtype:trojan-activity; sid:2024243; rev:3; metadata:attack_target IoT, created_at 2017_04_25, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_08_05;)