alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING CoGUI Fingerprint Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:11; content:"/api/verify"; fast_pattern; http.content_type; content:"application/json"; http.request_body; content:"event_id"; content:"client_ua"; content:"honeypot"; content:"behavior"; classtype:bad-unknown; sid:2070062; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_06_25, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Minor, tag Phishing, tag CoGUI, updated_at 2026_06_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)