alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Mirai Variant User-Agent (Outbound)"; flow:established,to_server; http.user_agent; pcre:"/^Messiah(?:(?:\/|\s)[0-9]\.0)?$/i"; content:"Messiah"; fast_pattern; startswith; classtype:web-application-attack; sid:2029029; rev:2; metadata:affected_product Linux, attack_target IoT, created_at 2019_11_21, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_23;)