alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TrochilusRAT CnC Beacon 2"; flow:established,to_server; dsize:13; content:"|07 0d 00 00 00 00 00 00 00 00 00 00 00|"; fast_pattern; reference:url,asert.arbornetworks.com/wp-content/uploads/2016/01/ASERT-Threat-Intelligence-Brief-Uncovering-the-Seven-Pointed-Dagger.pdf; classtype:command-and-control; sid:2022361; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_01_13, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2019_10_08, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)