alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Malleable C2 Profile wordpress_ Cookie Test"; flow:established,to_server; http.cookie; content:"wordpress"; fast_pattern; pcre:"/^_?=?(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/"; http.header_names; content:!"Referer"; reference:url,thedfirreport.com/2021/06/20/from-word-to-lateral-movement-in-1-hour/; classtype:trojan-activity; sid:2033158; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_06_22, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_04_25, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)