alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE W32/Eclipse.DDOSBot CnC Beacon Response"; flow:established,to_client; file_data; content:"<base>PGNtZD"; within:12; reference:url,www.arbornetworks.com/asert/2014/04/trojan-eclipse-a-bad-moon-rising/; classtype:command-and-control; sid:2018423; rev:3; metadata:attack_target Client_Endpoint, created_at 2014_04_28, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_09_27, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)