alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE PHPs Labyrinth Backdoor Stage1 CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?host="; fast_pattern; content:"&password="; distance:0; pcre:"/\.php\?host=[^&]+&password=[a-f0-9]{32}$/"; reference:url,blog.prevailion.com/2020/02/phps-labyrinth-weaponized-wordpress.html; classtype:command-and-control; sid:2029499; rev:3; metadata:affected_product Wordpress_Plugins, attack_target Web_Server, created_at 2020_02_19, deployment Perimeter, deployment Datacenter, deployment SSLDecrypt, confidence High, signature_severity Major, updated_at 2020_12_10;)