alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SERVER ATTACKER WebShell - Weevely - POSTed"; flow:established,to_server; http.request_body; content:"<?php|0A|$"; content:"="; distance:4; within:2; content:" str_replace("; distance:0; classtype:trojan-activity; sid:2020556; rev:3; metadata:created_at 2015_02_24, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_15;)