alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon APT Style Delimiter Observed In HTTP Cookie"; flow:established,to_server; http.cookie; content:"|3a 3a 2f 2e|"; fast_pattern; reference:url,community.emergingthreats.net/t/sigs-possible-gamaredon-apt-delimiter/2667; reference:url,unit42.paloaltonetworks.com/trident-ursa/; classtype:command-and-control; sid:2061887; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_04_25, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Critical, tag Gamaredon, tag c2, updated_at 2025_04_25, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)