alert http $HOME_NET any -> any any (msg:"ET WEB_SPECIFIC_APPS N-able N-central Session ID Disclosure"; flow:established,to_client; flowbits:isset,ET.N_able_N_central.CVE_2025_9316; http.response_body; content:"ns1|3a|sessionHelloResponse"; fast_pattern; content:"|3c 2f|sessionid|3e|"; nocase; distance:0; pcre:"/\x3e\d+\x3c\x2fsessionid\x3e/i"; http.stat_code; content:"200"; reference:url,horizon3.ai/attack-research/attack-blogs/n-able-n-central-from-n-days-to-0-days/; classtype:web-application-attack; sid:2065914; rev:1; metadata:affected_product N_Able, attack_target Server, tls_state TLSDecrypt, created_at 2025_11_25, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Minor, updated_at 2025_11_25, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1082, mitre_technique_name System_Information_Discovery; target:dest_ip;)