alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Symmi Remote File Injector Initial CnC Beacon"; flow:established,to_server; http.uri; content:"/ggu.php"; fast_pattern; http.user_agent; content:"Mozilla/5.0"; depth:11; endswith; reference:url,www.deependresearch.org/2013/05/under-this-rock-vulnerable.html; classtype:command-and-control; sid:2016967; rev:5; metadata:attack_target Client_Endpoint, created_at 2013_06_04, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_15, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)