alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET RETIRED Night Dragon CnC Beacon Outbound"; flow:established,to_server; dsize:16; content:"|01 50 00 00 00 00 00 00 00 00 00 01 68 57 24 13|"; threshold:type limit, count 1, seconds 60, track by_src; reference:url,www.mcafee.com/us/resources/white-papers/wp-global-energy-cyberattacks-night-dragon.pdf; classtype:command-and-control; sid:2012303; rev:5; metadata:attack_target Client_Endpoint, created_at 2011_02_10, deployment Perimeter, former_category MALWARE, confidence High, signature_severity Major, tag c2, updated_at 2024_12_03, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)