alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kazuar CnC Beacon"; flow:established,to_server; http.method; content:"GET"; http.cookie; bsize:54; content:"AuthToken="; fast_pattern; startswith; pcre:"/^AuthToken=[A-Za-z0-9+/]{43}=$/"; http.header_names; content:!"|0d 0a|Accept"; content:"|0d 0a|Referer|0d 0a|"; reference:md5,7a778e076e48ff269e91f17a15ea97d5; reference:url,researchcenter.paloaltonetworks.com/2017/05/unit42-kazuar-multiplatform-espionage-backdoor-api-access/; classtype:command-and-control; sid:2024270; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_05_04, deployment Perimeter, malware_family Turla, malware_family Kazuar, confidence High, signature_severity Major, tag APT, tag RUAPT, tag c2, updated_at 2024_03_04, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)