alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO SimpleHelp RMM machine ping Request to Server"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/machine-"; fast_pattern; startswith; pcre:"/^\d{13}/R"; content:"|3f|ping|3d|"; distance:0; content:"53475F"; distance:0; content:"5375697465"; distance:0; pcre:"/\x3fping\x3d[A-F0-9]{10,}$/"; threshold:type limit,track by_src,count 5,seconds 300; reference:url,simple-help.com/; classtype:misc-activity; sid:2067965; rev:1; metadata:affected_product SimpleHelp, attack_target Client_and_Server, tls_state plaintext, created_at 2026_03_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag RMM, updated_at 2026_03_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1219, mitre_technique_name Remote_Access_Software; target:src_ip;)