alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Carbanak APT CnC Beacon 2"; flow:established,to_server; content:"|00 00|OS|3a 20|"; offset:10; depth:6; fast_pattern; content:"|2c 20|Domain|3a 20|"; distance:0; content:"|2c 20|User|3a 20|"; distance:0; content:"|00|"; distance:0; reference:url,securelist.com/files/2015/02/Carbanak_APT_eng.pdf; classtype:targeted-activity; sid:2020456; rev:1; metadata:attack_target Client_Endpoint, created_at 2015_02_17, deployment Perimeter, 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;)