alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Mirai Variant User-Agent (Outbound)"; flow:established,to_server; content:"User-Agent|3a 20|Hello, World"; http_header; fast_pattern; pcre:"/^Hello, World(?:(?:\/|\s)[0-9]\.0)?$/Vi"; classtype:web-application-attack; sid:2029034; rev:1; metadata:affected_product Linux, attack_target IoT?, deployment Perimeter, signature_severity Major, created_at 2019_11_21, updated_at 2019_11_21;)

Added 2019-11-21 20:14:21 UTC