alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent SimpleClient 1.0"; flow:established,to_server; http.header; content:"User-Agent|3A| SimpleClient "; reference:url,www.fortiguard.com/encyclopedia/virus/symbos_sagasi.a!tr.html; classtype:bad-unknown; sid:2012860; rev:5; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2011_05_26, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, updated_at 2020_04_22;)