alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Bulta CnC Beacon"; flow:established,to_server; content:"|1f 93 97 d3 94 01 69 49 4d 7b a7 ac f6 7a|"; depth:14; reference:md5,8dd612b14a2a448e8b1b6f3d09909e45; classtype:command-and-control; sid:2022345; rev:2; metadata:attack_target Client_Endpoint, created_at 2016_01_09, deployment Perimeter, malware_family Win32_Bulta, confidence High, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)