Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Remote Monitoring and Management (RMM) Tool in TLS SNI (simplehelp .io)"; flow:established,to_server; tls.sni; bsize:13; content:"simplehelp.io"; fast_pattern; reference:url,url,attack.mitre.org/techniques/T1219/; reference:url,url,help.gorelo.io/en/articles/8651857-gorelo-connect-remote-control; reference:url,url,discord.gorelo.io/m/1399561240031789116; classtype:misc-activity; sid:2067217; rev:1; metadata:affected_product Windows_11, affected_product Windows_8, affected_product Windows_10, affected_product SimpleHelp, attack_target Client_and_Server, tls_state TLSDecrypt, created_at 2026_01_30, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, tag RAT, tag RemoteAccessTool, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_01_30;)