alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO ISLOnline RMM Installer Activity"; flow:established,to_server; http.uri; content:"|2f|ISLAlwaysOn|3f|"; fast_pattern; http.host; content:"islonline.net"; endswith; reference:md5,205373cb713016d5aff8c7d3dc50a29a; reference:url,attack.mitre.org/techniques/T1219/; classtype:misc-activity; sid:2063689; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, tls_state TLSDecrypt, created_at 2025_07_24, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, tag RAT, tag RemoteAccessTool, updated_at 2025_07_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1219, mitre_technique_name Remote_Access_Software; target:src_ip;)