alert tcp $HOME_NET any -> $EXTERNAL_NET !80 (msg:"ET MALWARE njRAT Variant Outbound CnC Beacon"; flow:established,to_server; content:"|7c|nj-q8"; endswith; classtype:command-and-control; sid:2021057; rev:2; metadata:attack_target Client_Endpoint, created_at 2015_05_05, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2019_09_28, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)