alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE AstarionRAT CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:40; content:"/intake/organizations/events|3f|channel|3d|app"; fast_pattern; http.user_agent; content:"Edge/18.19045"; http.cookie; content:"AFUAK|3d|1C5DEC09609A6B41|3b|"; startswith; content:"BLA|3d|"; within:10; content:"HFK=423b5828bc98f5c7c57e6c321"; distance:0; endswith; reference:url,www.huntress.com/blog/clickfix-matanbuchus-astarionrat-analysis; classtype:trojan-activity; sid:2067734; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_02_17, deployment Perimeter, malware_family AstarionRAT, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2026_02_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)