alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE GammaLoad CnC Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/joe"; content:"/josie.ai"; endswith; http.content_len; bsize:4; content:"7280"; http.cookie; bsize:8; content:"joyfully"; fast_pattern; http.user_agent; content:"|3a 3a 2f 2e|"; reference:url,go.recordedfuture.com/hubfs/reports/cta-ru-2024-1205.pdf; reference:url,ommunity.emergingthreats.net/t/et-malware-gamaredon-apt-trycloudflare-activity/2327; classtype:command-and-control; sid:2058994; 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_01_06, deployment Perimeter, deployment SSLDecrypt, malware_family GammaLoad, confidence High, signature_severity Critical, updated_at 2025_01_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)