alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE KeyBoy CnC Beacon"; flow:established,to_server; content:"|8a 00 d1 00 8a 00 6a 00|"; depth:8; reference:url,citizenlab.org/2016/11/parliament-keyboy/; reference:md5,8846d109b457a2ee44ddbf54d1cf7944; classtype:command-and-control; sid:2023527; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_18, deployment Perimeter, malware_family KeyBoy, confidence Medium, 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;)