alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ELF/Mirai Variant User-Agent (Outbound)"; flow:established,to_server; http.user_agent; content:"Katana/"; fast_pattern; startswith; classtype:web-application-attack; sid:2030910; rev:2; metadata:affected_product Linux, attack_target IoT, created_at 2020_09_28, deployment Perimeter, malware_family ELF_Mirai, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_28;)