alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Malleable C2 (Wordpress Profile)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/admin"; bsize:6; http.cookie; content:"wordpress_"; startswith; pcre:"/^[a-z0-9]{32}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R"; http.accept_lang; content:"en-GB|3b|q=0.9,|20|*|3b|q=0.7"; fast_pattern; reference:md5,e75bef518faea38765cb91b71ba6c8a8; classtype:command-and-control; sid:2032755; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_02_16, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2021_02_16, reviewed_at 2023_08_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)